[PATCH 6.6 000/124] 6.6.58-rc1 review

[PATCH 6.6 000/124] 6.6.58-rc1 review

[Greg Kroah-Hartman]

This is the start of the stable review cycle for the 6.6.58 release.
There are 124 patches in this series, all will be posted as a response
to this one.  If anyone has any issues with these being applied, please
let me know.

Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
or in the git tree and branch at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 6.6.58-rc1

Vasiliy Kovalev <kovalev@altlinux.org>
    ALSA: hda/conexant - Use cached pin control for Node 0x1d on HP EliteOne 1000 G2

Ryusuke Konishi <konishi.ryusuke@gmail.com>
    nilfs2: propagate directory read errors from nilfs_find_entry()

Matthieu Baerts (NGI0) <matttbe@kernel.org>
    selftests: mptcp: remove duplicated variables

Paolo Abeni <pabeni@redhat.com>
    selftests: mptcp: join: test for prohibited MPC to port-based endp

Geliang Tang <tanggeliang@kylinos.cn>
    selftests: mptcp: join: change capture/checksum as bool

Paolo Abeni <pabeni@redhat.com>
    tcp: fix mptcp DSS corruption due to large pmtu xmit

Johan Hovold <johan+linaro@kernel.org>
    serial: qcom-geni: fix receiver enable

Johan Hovold <johan+linaro@kernel.org>
    serial: qcom-geni: fix dma rx cancellation

Johan Hovold <johan+linaro@kernel.org>
    serial: qcom-geni: revert broken hibernation support

Johan Hovold <johan+linaro@kernel.org>
    serial: qcom-geni: fix polled console initialisation

Nam Cao <namcao@linutronix.de>
    irqchip/sifive-plic: Unmask interrupt in plic_irq_enable()

Marc Zyngier <maz@kernel.org>
    irqchip/gic-v4: Don't allow a VMOVP on a dying VPE

Ma Ke <make24@iscas.ac.cn>
    pinctrl: apple: check devm_kasprintf() returned value

Ma Ke <make24@iscas.ac.cn>
    pinctrl: stm32: check devm_kasprintf() returned value

Sergey Matsievskiy <matsievskiysv@gmail.com>
    pinctrl: ocelot: fix system hang on level based interrupts

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/bugs: Use code segment selector for VERW operand

Longlong Xia <xialonglong@kylinos.cn>
    tty: n_gsm: Fix use-after-free in gsm_cleanup_mux

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/entry_32: Clear CPU buffers after register restore in NMI return

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/entry_32: Do not clobber user EFLAGS.ZF

John Allen <john.allen@amd.com>
    x86/CPU/AMD: Only apply Zenbleed fix for Zen2 during late microcode load

Zhang Rui <rui.zhang@intel.com>
    x86/apic: Always explicitly disarm TSC-deadline timer

Nathan Chancellor <nathan@kernel.org>
    x86/resctrl: Annotate get_mem_config() functions as __init

Takashi Iwai <tiwai@suse.de>
    parport: Proper fix for array out-of-bounds access

Marek Vasut <marex@denx.de>
    serial: imx: Update mctrl old_status on RTSD interrupt

Heiko Thiery <heiko.thiery@gmail.com>
    misc: microchip: pci1xxxx: add support for NVMEM_DEVID_AUTO for OTP device

Heiko Thiery <heiko.thiery@gmail.com>
    misc: microchip: pci1xxxx: add support for NVMEM_DEVID_AUTO for EEPROM device

Prashanth K <quic_prashk@quicinc.com>
    usb: dwc3: Wait for EndXfer completion before restoring GUSB2PHYCFG

Jonathan Marek <jonathan@marek.ca>
    usb: typec: qcom-pmic-typec: fix sink status being overwritten with RP_DEF

Daniele Palmas <dnlplm@gmail.com>
    USB: serial: option: add Telit FN920C04 MBIM compositions

Benjamin B. Frost <benjamin@geanix.com>
    USB: serial: option: add support for Quectel EG916Q-GL

Mathias Nyman <mathias.nyman@linux.intel.com>
    xhci: Mitigate failed set dequeue pointer commands

Mathias Nyman <mathias.nyman@linux.intel.com>
    xhci: Fix incorrect stream context type macro

Henry Lin <henryl@nvidia.com>
    xhci: tegra: fix checked USB2 port number

Jeongjun Park <aha310510@gmail.com>
    vt: prevent kernel-infoleak in con_font_get()

Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
    Bluetooth: btusb: Fix regression with fake CSR controllers 0a12:0001

Aaron Thompson <dev@aaront.org>
    Bluetooth: ISO: Fix multiple init when debugfs is disabled

Aaron Thompson <dev@aaront.org>
    Bluetooth: Remove debugfs directory on module init failure

Aaron Thompson <dev@aaront.org>
    Bluetooth: Call iso_exit() on module unload

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: accel: kx022a: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: adc: ti-ads124s08: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: adc: ti-lmp92064: add missing select REGMAP_SPI in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: dac: ad3552r: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: proximity: mb1232: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: dac: ad5766: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: light: bu27008: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: frequency: adf4377: add missing select REMAP_SPI in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: amplifiers: ada4250: add missing select REGMAP_SPI in Kconfig

Emil Gedenryd <emil.gedenryd@axis.com>
    iio: light: opt3001: add missing full-scale range value

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: light: veml6030: fix IIO device retrieval from embedded device

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: light: veml6030: fix ALS sensor resolution

Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    iio: hid-sensors: Fix an error handling path in _hid_sensor_set_report_latency()

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: adc: ti-ads8688: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: dac: stm32-dac-core: add missing select REGMAP_MMIO in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: dac: ltc1660: add missing select REGMAP_SPI in Kconfig

Javier Carrasco <javier.carrasco.cruz@gmail.com>
    iio: dac: ad5770r: add missing select REGMAP_SPI in Kconfig

Mohammed Anees <pvmohammedanees2003@gmail.com>
    drm/amdgpu: prevent BO_HANDLES error from being overwritten

Alex Deucher <alexander.deucher@amd.com>
    drm/amdgpu/swsmu: Only force workload setup on init

Nikolay Kuratov <kniv@yandex-team.ru>
    drm/vmwgfx: Handle surface check failure correctly

Ville Syrjälä <ville.syrjala@linux.intel.com>
    drm/radeon: Fix encoder->possible_clones

Peter Wang <peter.wang@mediatek.com>
    scsi: ufs: core: Fix the issue of ICU failure

Seunghwan Baek <sh8267.baek@samsung.com>
    scsi: ufs: core: Set SDEV_OFFLINE when UFS is shut down

John Edwards <uejji@uejji.net>
    Input: xpad - add support for MSI Claw A1M

Yun Lu <luyun@kylinos.cn>
    selftest: hid: add the missing tests directory

Ming Lei <ming.lei@redhat.com>
    ublk: don't allow user copy for unprivileged device

Jens Axboe <axboe@kernel.dk>
    io_uring/sqpoll: close race on waiting for sqring entries

Omar Sandoval <osandov@fb.com>
    blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race

Johannes Wikner <kwikner@ethz.ch>
    x86/bugs: Do not use UNTRAIN_RET with IBPB on entry

Johannes Wikner <kwikner@ethz.ch>
    x86/bugs: Skip RSB fill at VMEXIT

Johannes Wikner <kwikner@ethz.ch>
    x86/entry: Have entry_ibpb() invalidate return predictions

Johannes Wikner <kwikner@ethz.ch>
    x86/cpufeatures: Add a IBPB_NO_RET BUG flag

Jim Mattson <jmattson@google.com>
    x86/cpufeatures: Define X86_FEATURE_AMD_IBPB_RET

Michael Mueller <mimu@linux.ibm.com>
    KVM: s390: Change virtual to physical address access in diag 0x258 handler

Nico Boehr <nrb@linux.ibm.com>
    KVM: s390: gaccess: Check if guest address is in memslot

Thomas Weißschuh <thomas.weissschuh@linutronix.de>
    s390/sclp_vt220: Convert newlines to CRLF instead of LFCR

Thomas Weißschuh <thomas.weissschuh@linutronix.de>
    s390/sclp: Deactivate sclp after all its users

Lu Baolu <baolu.lu@linux.intel.com>
    iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices

Paolo Abeni <pabeni@redhat.com>
    mptcp: prevent MPC handshake on port-based signal endpoints

Csókás, Bence <csokas.bence@prolan.hu>
    net: fec: Remove duplicated code

Csókás, Bence <csokas.bence@prolan.hu>
    net: fec: Move `fec_ptp_read()` to the top of the file

Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
    maple_tree: correct tree corruption on spanning store

Darrick J. Wong <djwong@kernel.org>
    xfs: restrict when we try to align cow fork delalloc to cowextsz hints

Darrick J. Wong <djwong@kernel.org>
    xfs: allow unlinked symlinks and dirs with zero size

Christoph Hellwig <hch@lst.de>
    xfs: fix freeing speculative preallocations for preallocated files

Dave Chinner <dchinner@redhat.com>
    xfs: fix unlink vs cluster buffer instantiation race

Wengang Wang <wen.gang.wang@oracle.com>
    xfs: make sure sb_fdblocks is non-negative

Darrick J. Wong <djwong@kernel.org>
    xfs: allow symlinks with short remote targets

Zhang Yi <yi.zhang@huawei.com>
    xfs: convert delayed extents to unwritten when zeroing post eof blocks

Zhang Yi <yi.zhang@huawei.com>
    xfs: make xfs_bmapi_convert_delalloc() to allocate the target offset

Zhang Yi <yi.zhang@huawei.com>
    xfs: make the seq argument to xfs_bmapi_convert_delalloc() optional

Zhang Yi <yi.zhang@huawei.com>
    xfs: match lock mode in xfs_buffered_write_iomap_begin()

Darrick J. Wong <djwong@kernel.org>
    xfs: use dontcache for grabbing inodes during scrub

Darrick J. Wong <djwong@kernel.org>
    xfs: revert commit 44af6c7e59b12

Darrick J. Wong <djwong@kernel.org>
    xfs: enforce one namespace per attribute

Darrick J. Wong <djwong@kernel.org>
    xfs: validate recovered name buffers when recovering xattr items

Darrick J. Wong <djwong@kernel.org>
    xfs: check shortform attr entry flags specifically

Darrick J. Wong <djwong@kernel.org>
    xfs: fix missing check for invalid attr flags

Darrick J. Wong <djwong@kernel.org>
    xfs: check opcode and iovec count match in xlog_recover_attri_commit_pass2

Darrick J. Wong <djwong@kernel.org>
    xfs: require XFS_SB_FEAT_INCOMPAT_LOG_XATTRS for attr log intent item recovery

Christoph Hellwig <hch@lst.de>
    xfs: remove a racy if_bytes check in xfs_reflink_end_cow_extent

Christoph Hellwig <hch@lst.de>
    xfs: fix xfs_bmap_add_extent_delay_real for partial conversions

Christoph Hellwig <hch@lst.de>
    xfs: fix error returns from xfs_bmapi_write

Liu Shixin <liushixin2@huawei.com>
    mm/swapfile: skip HugeTLB pages for unuse_vma

Wei Xu <weixugc@google.com>
    mm/mglru: only clear kswapd_failures if reclaimable

Jann Horn <jannh@google.com>
    mm/mremap: fix move_normal_pmd/retract_page_tables race

Edward Liaw <edliaw@google.com>
    selftests/mm: fix deadlock for fork after pthread_create on ARM

Edward Liaw <edliaw@google.com>
    selftests/mm: replace atomic_bool with pthread_barrier_t

OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
    fat: fix uninitialized variable

Nianyao Tang <tangnianyao@huawei.com>
    irqchip/gic-v3-its: Fix VSYNC referencing an unmapped VPE on GIC v4.1

Jinjie Ruan <ruanjinjie@huawei.com>
    net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()

Oleksij Rempel <o.rempel@pengutronix.de>
    net: macb: Avoid 20s boot delay by skipping MDIO bus registration for fixed-link PHY

Mark Rutland <mark.rutland@arm.com>
    arm64: probes: Fix uprobes for big-endian kernels

Mark Rutland <mark.rutland@arm.com>
    arm64: probes: Fix simulate_ldr*_literal()

Mark Rutland <mark.rutland@arm.com>
    arm64: probes: Remove broken LDR (literal) uprobe support

Jinjie Ruan <ruanjinjie@huawei.com>
    posix-clock: Fix missing timespec64 check in pc_clock_settime()

Wei Fang <wei.fang@nxp.com>
    net: enetc: add missing static descriptor and inline keyword

Wei Fang <wei.fang@nxp.com>
    net: enetc: disable NAPI after all rings are disabled

Wei Fang <wei.fang@nxp.com>
    net: enetc: disable Tx BD rings after they are empty

Wei Fang <wei.fang@nxp.com>
    net: enetc: block concurrent XDP transmissions during ring reconfiguration

Wei Fang <wei.fang@nxp.com>
    net: enetc: remove xdp_drops statistic from enetc_xdp_drop()

Matthieu Baerts (NGI0) <matttbe@kernel.org>
    mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow

Vasiliy Kovalev <kovalev@altlinux.org>
    ALSA: hda/conexant - Fix audio routing for HP EliteOne 1000 G2

Namjae Jeon <linkinjeon@kernel.org>
    ksmbd: fix user-after-free from session log off

Roi Martin <jroi.martin@gmail.com>
    btrfs: fix uninitialized pointer free on read_alloc_one_name() error

Roi Martin <jroi.martin@gmail.com>
    btrfs: fix uninitialized pointer free in add_inode_ref()


-------------

Diffstat:

 Makefile                                           |   4 +-
 arch/arm64/include/asm/uprobes.h                   |   8 +-
 arch/arm64/kernel/probes/decode-insn.c             |  16 ++-
 arch/arm64/kernel/probes/simulate-insn.c           |  18 ++-
 arch/arm64/kernel/probes/uprobes.c                 |   4 +-
 arch/s390/kvm/diag.c                               |   2 +-
 arch/s390/kvm/gaccess.c                            |   4 +
 arch/s390/kvm/gaccess.h                            |  14 ++-
 arch/x86/entry/entry.S                             |   5 +
 arch/x86/entry/entry_32.S                          |   6 +-
 arch/x86/include/asm/cpufeatures.h                 |   4 +-
 arch/x86/include/asm/nospec-branch.h               |  11 +-
 arch/x86/kernel/apic/apic.c                        |  14 ++-
 arch/x86/kernel/cpu/amd.c                          |   3 +-
 arch/x86/kernel/cpu/bugs.c                         |  32 +++++
 arch/x86/kernel/cpu/common.c                       |   3 +
 arch/x86/kernel/cpu/resctrl/core.c                 |   4 +-
 block/blk-rq-qos.c                                 |   2 +-
 drivers/block/ublk_drv.c                           |  11 +-
 drivers/bluetooth/btusb.c                          |  13 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c             |   2 +-
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c          |   6 +-
 drivers/gpu/drm/radeon/radeon_encoders.c           |   2 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c                |   1 +
 drivers/iio/accel/Kconfig                          |   2 +
 drivers/iio/adc/Kconfig                            |   5 +
 drivers/iio/amplifiers/Kconfig                     |   1 +
 .../iio/common/hid-sensors/hid-sensor-trigger.c    |   2 +-
 drivers/iio/dac/Kconfig                            |   7 ++
 drivers/iio/frequency/Kconfig                      |   1 +
 drivers/iio/light/Kconfig                          |   2 +
 drivers/iio/light/opt3001.c                        |   4 +
 drivers/iio/light/veml6030.c                       |   5 +-
 drivers/iio/proximity/Kconfig                      |   2 +
 drivers/input/joystick/xpad.c                      |   2 +
 drivers/iommu/intel/iommu.c                        |   4 +-
 drivers/irqchip/irq-gic-v3-its.c                   |  26 ++--
 drivers/irqchip/irq-sifive-plic.c                  |  21 ++--
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c  |   2 +
 drivers/net/ethernet/cadence/macb_main.c           |  14 ++-
 drivers/net/ethernet/freescale/enetc/enetc.c       |  56 +++++++--
 drivers/net/ethernet/freescale/enetc/enetc.h       |   1 +
 drivers/net/ethernet/freescale/fec_ptp.c           |  58 ++++-----
 .../net/ethernet/microchip/vcap/vcap_api_kunit.c   |   2 +
 drivers/parport/procfs.c                           |  22 ++--
 drivers/pinctrl/pinctrl-apple-gpio.c               |   3 +
 drivers/pinctrl/pinctrl-ocelot.c                   |   8 +-
 drivers/pinctrl/stm32/pinctrl-stm32.c              |   9 +-
 drivers/s390/char/sclp.c                           |   3 +-
 drivers/s390/char/sclp_vt220.c                     |   4 +-
 drivers/tty/n_gsm.c                                |   2 +
 drivers/tty/serial/imx.c                           |  15 +++
 drivers/tty/serial/qcom_geni_serial.c              |  90 +++++++-------
 drivers/tty/vt/vt.c                                |   2 +-
 drivers/ufs/core/ufs-mcq.c                         |  15 +--
 drivers/ufs/core/ufshcd.c                          |   4 +-
 drivers/usb/dwc3/gadget.c                          |  10 +-
 drivers/usb/host/xhci-ring.c                       |   2 +-
 drivers/usb/host/xhci-tegra.c                      |   2 +-
 drivers/usb/host/xhci.h                            |   2 +-
 drivers/usb/serial/option.c                        |   8 ++
 drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c |   1 -
 fs/btrfs/tree-log.c                                |   6 +-
 fs/fat/namei_vfat.c                                |   2 +-
 fs/nilfs2/dir.c                                    |  50 ++++----
 fs/nilfs2/namei.c                                  |  39 ++++--
 fs/nilfs2/nilfs.h                                  |   2 +-
 fs/smb/server/mgmt/user_session.c                  |  26 +++-
 fs/smb/server/mgmt/user_session.h                  |   4 +
 fs/smb/server/server.c                             |   2 +
 fs/smb/server/smb2pdu.c                            |   8 +-
 fs/xfs/libxfs/xfs_attr.c                           |  11 ++
 fs/xfs/libxfs/xfs_attr.h                           |   4 +-
 fs/xfs/libxfs/xfs_attr_leaf.c                      |   6 +-
 fs/xfs/libxfs/xfs_attr_remote.c                    |   1 -
 fs/xfs/libxfs/xfs_bmap.c                           | 130 ++++++++++++++++----
 fs/xfs/libxfs/xfs_da_btree.c                       |  20 +--
 fs/xfs/libxfs/xfs_da_format.h                      |   5 +
 fs/xfs/libxfs/xfs_inode_buf.c                      |  49 ++++++--
 fs/xfs/libxfs/xfs_sb.c                             |   7 +-
 fs/xfs/scrub/attr.c                                |  47 ++++---
 fs/xfs/scrub/common.c                              |  12 +-
 fs/xfs/scrub/scrub.h                               |   7 ++
 fs/xfs/xfs_aops.c                                  |  54 +++------
 fs/xfs/xfs_attr_item.c                             |  98 ++++++++++++---
 fs/xfs/xfs_attr_list.c                             |  11 +-
 fs/xfs/xfs_bmap_util.c                             |  65 ++++++----
 fs/xfs/xfs_bmap_util.h                             |   2 +-
 fs/xfs/xfs_dquot.c                                 |   1 -
 fs/xfs/xfs_icache.c                                |   2 +-
 fs/xfs/xfs_inode.c                                 |  37 +++---
 fs/xfs/xfs_iomap.c                                 |  81 +++++++------
 fs/xfs/xfs_reflink.c                               |  20 ---
 fs/xfs/xfs_rtalloc.c                               |   2 -
 include/linux/fsl/enetc_mdio.h                     |   3 +-
 include/linux/irqchip/arm-gic-v4.h                 |   4 +-
 include/uapi/linux/ublk_cmd.h                      |   8 +-
 io_uring/io_uring.h                                |   9 +-
 kernel/time/posix-clock.c                          |   3 +
 lib/maple_tree.c                                   |  12 +-
 mm/mremap.c                                        |  11 +-
 mm/swapfile.c                                      |   2 +-
 mm/vmscan.c                                        |   4 +-
 net/bluetooth/af_bluetooth.c                       |   3 +
 net/bluetooth/iso.c                                |   6 +-
 net/ipv4/tcp_output.c                              |   4 +-
 net/mptcp/mib.c                                    |   1 +
 net/mptcp/mib.h                                    |   1 +
 net/mptcp/pm_netlink.c                             |   3 +-
 net/mptcp/protocol.h                               |   1 +
 net/mptcp/subflow.c                                |  11 ++
 sound/pci/hda/patch_conexant.c                     |  19 +++
 tools/testing/selftests/hid/Makefile               |   1 +
 tools/testing/selftests/mm/uffd-common.c           |   5 +-
 tools/testing/selftests/mm/uffd-common.h           |   3 +-
 tools/testing/selftests/mm/uffd-unit-tests.c       |  21 +++-
 tools/testing/selftests/net/mptcp/mptcp_join.sh    | 135 +++++++++++++++------
 tools/testing/selftests/net/mptcp/mptcp_lib.sh     |  11 --
 118 files changed, 1126 insertions(+), 574 deletions(-)

[PATCH 6.6 001/124] btrfs: fix uninitialized pointer free in add_inode_ref()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roi Martin <jroi.martin@gmail.com>

commit 66691c6e2f18d2aa4b22ffb624b9bdc97e9979e4 upstream.

The add_inode_ref() function does not initialize the "name" struct when
it is declared.  If any of the following calls to "read_one_inode()
returns NULL,

	dir = read_one_inode(root, parent_objectid);
	if (!dir) {
		ret = -ENOENT;
		goto out;
	}

	inode = read_one_inode(root, inode_objectid);
	if (!inode) {
		ret = -EIO;
		goto out;
	}

then "name.name" would be freed on "out" before being initialized.

out:
	...
	kfree(name.name);

This issue was reported by Coverity with CID 1526744.

Fixes: e43eec81c516 ("btrfs: use struct qstr instead of name and namelen pairs")
CC: stable@vger.kernel.org # 6.6+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Roi Martin <jroi.martin@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/btrfs/tree-log.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1374,7 +1374,7 @@ static noinline int add_inode_ref(struct
 	struct inode *inode = NULL;
 	unsigned long ref_ptr;
 	unsigned long ref_end;
-	struct fscrypt_str name;
+	struct fscrypt_str name = { 0 };
 	int ret;
 	int log_ref_ver = 0;
 	u64 parent_objectid;

[PATCH 6.6 002/124] btrfs: fix uninitialized pointer free on read_alloc_one_name() error

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roi Martin <jroi.martin@gmail.com>

commit 2ab5e243c2266c841e0f6904fad1514b18eaf510 upstream.

The function read_alloc_one_name() does not initialize the name field of
the passed fscrypt_str struct if kmalloc fails to allocate the
corresponding buffer.  Thus, it is not guaranteed that
fscrypt_str.name is initialized when freeing it.

This is a follow-up to the linked patch that fixes the remaining
instances of the bug introduced by commit e43eec81c516 ("btrfs: use
struct qstr instead of name and namelen pairs").

Link: https://lore.kernel.org/linux-btrfs/20241009080833.1355894-1-jroi.martin@gmail.com/
Fixes: e43eec81c516 ("btrfs: use struct qstr instead of name and namelen pairs")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Roi Martin <jroi.martin@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/btrfs/tree-log.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1846,7 +1846,7 @@ static noinline int replay_one_name(stru
 				    struct btrfs_dir_item *di,
 				    struct btrfs_key *key)
 {
-	struct fscrypt_str name;
+	struct fscrypt_str name = { 0 };
 	struct btrfs_dir_item *dir_dst_di;
 	struct btrfs_dir_item *index_dst_di;
 	bool dir_dst_matches = false;
@@ -2126,7 +2126,7 @@ static noinline int check_item_in_log(st
 	struct extent_buffer *eb;
 	int slot;
 	struct btrfs_dir_item *di;
-	struct fscrypt_str name;
+	struct fscrypt_str name = { 0 };
 	struct inode *inode = NULL;
 	struct btrfs_key location;
 

[PATCH 6.6 003/124] ksmbd: fix user-after-free from session log off

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Namjae Jeon <linkinjeon@kernel.org>

commit 7aa8804c0b67b3cb263a472d17f2cb50d7f1a930 upstream.

There is racy issue between smb2 session log off and smb2 session setup.
It will cause user-after-free from session log off.
This add session_lock when setting SMB2_SESSION_EXPIRED and referece
count to session struct not to free session while it is being used.

Cc: stable@vger.kernel.org # v5.15+
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-25282
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/smb/server/mgmt/user_session.c |   26 +++++++++++++++++++++-----
 fs/smb/server/mgmt/user_session.h |    4 ++++
 fs/smb/server/server.c            |    2 ++
 fs/smb/server/smb2pdu.c           |    8 +++++++-
 4 files changed, 34 insertions(+), 6 deletions(-)

--- a/fs/smb/server/mgmt/user_session.c
+++ b/fs/smb/server/mgmt/user_session.c
@@ -176,9 +176,10 @@ static void ksmbd_expire_session(struct
 
 	down_write(&conn->session_lock);
 	xa_for_each(&conn->sessions, id, sess) {
-		if (sess->state != SMB2_SESSION_VALID ||
-		    time_after(jiffies,
-			       sess->last_active + SMB2_SESSION_TIMEOUT)) {
+		if (atomic_read(&sess->refcnt) == 0 &&
+		    (sess->state != SMB2_SESSION_VALID ||
+		     time_after(jiffies,
+			       sess->last_active + SMB2_SESSION_TIMEOUT))) {
 			xa_erase(&conn->sessions, sess->id);
 			hash_del(&sess->hlist);
 			ksmbd_session_destroy(sess);
@@ -268,8 +269,6 @@ struct ksmbd_session *ksmbd_session_look
 
 	down_read(&sessions_table_lock);
 	sess = __session_lookup(id);
-	if (sess)
-		sess->last_active = jiffies;
 	up_read(&sessions_table_lock);
 
 	return sess;
@@ -288,6 +287,22 @@ struct ksmbd_session *ksmbd_session_look
 	return sess;
 }
 
+void ksmbd_user_session_get(struct ksmbd_session *sess)
+{
+	atomic_inc(&sess->refcnt);
+}
+
+void ksmbd_user_session_put(struct ksmbd_session *sess)
+{
+	if (!sess)
+		return;
+
+	if (atomic_read(&sess->refcnt) <= 0)
+		WARN_ON(1);
+	else
+		atomic_dec(&sess->refcnt);
+}
+
 struct preauth_session *ksmbd_preauth_session_alloc(struct ksmbd_conn *conn,
 						    u64 sess_id)
 {
@@ -390,6 +405,7 @@ static struct ksmbd_session *__session_c
 	xa_init(&sess->rpc_handle_list);
 	sess->sequence_number = 1;
 	rwlock_init(&sess->tree_conns_lock);
+	atomic_set(&sess->refcnt, 1);
 
 	ret = __init_smb2_session(sess);
 	if (ret)
--- a/fs/smb/server/mgmt/user_session.h
+++ b/fs/smb/server/mgmt/user_session.h
@@ -61,6 +61,8 @@ struct ksmbd_session {
 	struct ksmbd_file_table		file_table;
 	unsigned long			last_active;
 	rwlock_t			tree_conns_lock;
+
+	atomic_t			refcnt;
 };
 
 static inline int test_session_flag(struct ksmbd_session *sess, int bit)
@@ -104,4 +106,6 @@ void ksmbd_release_tree_conn_id(struct k
 int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name);
 void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id);
 int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id);
+void ksmbd_user_session_get(struct ksmbd_session *sess);
+void ksmbd_user_session_put(struct ksmbd_session *sess);
 #endif /* __USER_SESSION_MANAGEMENT_H__ */
--- a/fs/smb/server/server.c
+++ b/fs/smb/server/server.c
@@ -238,6 +238,8 @@ static void __handle_ksmbd_work(struct k
 	} while (is_chained == true);
 
 send:
+	if (work->sess)
+		ksmbd_user_session_put(work->sess);
 	if (work->tcon)
 		ksmbd_tree_connect_put(work->tcon);
 	smb3_preauth_hash_rsp(work);
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -605,8 +605,10 @@ int smb2_check_user_session(struct ksmbd
 
 	/* Check for validity of user session */
 	work->sess = ksmbd_session_lookup_all(conn, sess_id);
-	if (work->sess)
+	if (work->sess) {
+		ksmbd_user_session_get(work->sess);
 		return 1;
+	}
 	ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 	return -ENOENT;
 }
@@ -1743,6 +1745,7 @@ int smb2_sess_setup(struct ksmbd_work *w
 		}
 
 		conn->binding = true;
+		ksmbd_user_session_get(sess);
 	} else if ((conn->dialect < SMB30_PROT_ID ||
 		    server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
 		   (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
@@ -1769,6 +1772,7 @@ int smb2_sess_setup(struct ksmbd_work *w
 		}
 
 		conn->binding = false;
+		ksmbd_user_session_get(sess);
 	}
 	work->sess = sess;
 
@@ -2229,7 +2233,9 @@ int smb2_session_logoff(struct ksmbd_wor
 	}
 
 	ksmbd_destroy_file_table(&sess->file_table);
+	down_write(&conn->session_lock);
 	sess->state = SMB2_SESSION_EXPIRED;
+	up_write(&conn->session_lock);
 
 	ksmbd_free_user(sess->user);
 	sess->user = NULL;

[PATCH 6.6 004/124] ALSA: hda/conexant - Fix audio routing for HP EliteOne 1000 G2

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vasiliy Kovalev <kovalev@altlinux.org>

commit 9988844c457f6f17fb2e75aa000b6c3b1b673bb9 upstream.

There is a problem with simultaneous audio output to headphones and
speakers, and when headphones are turned off, the speakers also turn
off and do not turn them on.

However, it was found that if you boot linux immediately after windows,
there are no such problems. When comparing alsa-info, the only difference
is the different configuration of Node 0x1d:

working conf. (windows): Pin-ctls: 0x80: HP
not working     (linux): Pin-ctls: 0xc0: OUT HP

This patch disable the AC_PINCTL_OUT_EN bit of Node 0x1d and fixes the
described problem.

Signed-off-by: Vasiliy Kovalev <kovalev@altlinux.org>
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20241009134248.662175-1-kovalev@altlinux.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/pci/hda/patch_conexant.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -307,6 +307,7 @@ enum {
 	CXT_FIXUP_HP_SPECTRE,
 	CXT_FIXUP_HP_GATE_MIC,
 	CXT_FIXUP_MUTE_LED_GPIO,
+	CXT_FIXUP_HP_ELITEONE_OUT_DIS,
 	CXT_FIXUP_HP_ZBOOK_MUTE_LED,
 	CXT_FIXUP_HEADSET_MIC,
 	CXT_FIXUP_HP_MIC_NO_PRESENCE,
@@ -324,6 +325,19 @@ static void cxt_fixup_stereo_dmic(struct
 	spec->gen.inv_dmic_split = 1;
 }
 
+/* fix widget control pin settings */
+static void cxt_fixup_update_pinctl(struct hda_codec *codec,
+				   const struct hda_fixup *fix, int action)
+{
+	if (action == HDA_FIXUP_ACT_PROBE) {
+		/* Unset OUT_EN for this Node pin, leaving only HP_EN.
+		 * This is the value stored in the codec register after
+		 * the correct initialization of the previous windows boot.
+		 */
+		snd_hda_set_pin_ctl(codec, 0x1d, AC_PINCTL_HP_EN);
+	}
+}
+
 static void cxt5066_increase_mic_boost(struct hda_codec *codec,
 				   const struct hda_fixup *fix, int action)
 {
@@ -975,6 +989,10 @@ static const struct hda_fixup cxt_fixups
 		.type = HDA_FIXUP_FUNC,
 		.v.func = cxt_fixup_mute_led_gpio,
 	},
+	[CXT_FIXUP_HP_ELITEONE_OUT_DIS] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = cxt_fixup_update_pinctl,
+	},
 	[CXT_FIXUP_HP_ZBOOK_MUTE_LED] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = cxt_fixup_hp_zbook_mute_led,
@@ -1065,6 +1083,7 @@ static const struct snd_pci_quirk cxt506
 	SND_PCI_QUIRK(0x103c, 0x83b2, "HP EliteBook 840 G5", CXT_FIXUP_HP_DOCK),
 	SND_PCI_QUIRK(0x103c, 0x83b3, "HP EliteBook 830 G5", CXT_FIXUP_HP_DOCK),
 	SND_PCI_QUIRK(0x103c, 0x83d3, "HP ProBook 640 G4", CXT_FIXUP_HP_DOCK),
+	SND_PCI_QUIRK(0x103c, 0x83e5, "HP EliteOne 1000 G2", CXT_FIXUP_HP_ELITEONE_OUT_DIS),
 	SND_PCI_QUIRK(0x103c, 0x8402, "HP ProBook 645 G4", CXT_FIXUP_MUTE_LED_GPIO),
 	SND_PCI_QUIRK(0x103c, 0x8427, "HP ZBook Studio G5", CXT_FIXUP_HP_ZBOOK_MUTE_LED),
 	SND_PCI_QUIRK(0x103c, 0x844f, "HP ZBook Studio G5", CXT_FIXUP_HP_ZBOOK_MUTE_LED),

[PATCH 6.6 005/124] mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matthieu Baerts (NGI0) <matttbe@kernel.org>

commit 7decd1f5904a489d3ccdcf131972f94645681689 upstream.

Syzkaller reported this splat:

  ==================================================================
  BUG: KASAN: slab-use-after-free in mptcp_pm_nl_rm_addr_or_subflow+0xb44/0xcc0 net/mptcp/pm_netlink.c:881
  Read of size 4 at addr ffff8880569ac858 by task syz.1.2799/14662

  CPU: 0 UID: 0 PID: 14662 Comm: syz.1.2799 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
  Call Trace:
   <TASK>
   __dump_stack lib/dump_stack.c:94 [inline]
   dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
   print_address_description mm/kasan/report.c:377 [inline]
   print_report+0xc3/0x620 mm/kasan/report.c:488
   kasan_report+0xd9/0x110 mm/kasan/report.c:601
   mptcp_pm_nl_rm_addr_or_subflow+0xb44/0xcc0 net/mptcp/pm_netlink.c:881
   mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:914 [inline]
   mptcp_nl_remove_id_zero_address+0x305/0x4a0 net/mptcp/pm_netlink.c:1572
   mptcp_pm_nl_del_addr_doit+0x5c9/0x770 net/mptcp/pm_netlink.c:1603
   genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
   genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
   genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
   netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
   genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
   netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
   netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
   netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
   sock_sendmsg_nosec net/socket.c:729 [inline]
   __sock_sendmsg net/socket.c:744 [inline]
   ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2607
   ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
   __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
   do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
   __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
   do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
   entry_SYSENTER_compat_after_hwframe+0x84/0x8e
  RIP: 0023:0xf7fe4579
  Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
  RSP: 002b:00000000f574556c EFLAGS: 00000296 ORIG_RAX: 0000000000000172
  RAX: ffffffffffffffda RBX: 000000000000000b RCX: 0000000020000140
  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
  RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
  R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
   </TASK>

  Allocated by task 5387:
   kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
   kasan_save_track+0x14/0x30 mm/kasan/common.c:68
   poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
   __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
   kmalloc_noprof include/linux/slab.h:878 [inline]
   kzalloc_noprof include/linux/slab.h:1014 [inline]
   subflow_create_ctx+0x87/0x2a0 net/mptcp/subflow.c:1803
   subflow_ulp_init+0xc3/0x4d0 net/mptcp/subflow.c:1956
   __tcp_set_ulp net/ipv4/tcp_ulp.c:146 [inline]
   tcp_set_ulp+0x326/0x7f0 net/ipv4/tcp_ulp.c:167
   mptcp_subflow_create_socket+0x4ae/0x10a0 net/mptcp/subflow.c:1764
   __mptcp_subflow_connect+0x3cc/0x1490 net/mptcp/subflow.c:1592
   mptcp_pm_create_subflow_or_signal_addr+0xbda/0x23a0 net/mptcp/pm_netlink.c:642
   mptcp_pm_nl_fully_established net/mptcp/pm_netlink.c:650 [inline]
   mptcp_pm_nl_work+0x3a1/0x4f0 net/mptcp/pm_netlink.c:943
   mptcp_worker+0x15a/0x1240 net/mptcp/protocol.c:2777
   process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
   process_scheduled_works kernel/workqueue.c:3310 [inline]
   worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
   kthread+0x2c1/0x3a0 kernel/kthread.c:389
   ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
   ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

  Freed by task 113:
   kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
   kasan_save_track+0x14/0x30 mm/kasan/common.c:68
   kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
   poison_slab_object mm/kasan/common.c:247 [inline]
   __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
   kasan_slab_free include/linux/kasan.h:230 [inline]
   slab_free_hook mm/slub.c:2342 [inline]
   slab_free mm/slub.c:4579 [inline]
   kfree+0x14f/0x4b0 mm/slub.c:4727
   kvfree+0x47/0x50 mm/util.c:701
   kvfree_rcu_list+0xf5/0x2c0 kernel/rcu/tree.c:3423
   kvfree_rcu_drain_ready kernel/rcu/tree.c:3563 [inline]
   kfree_rcu_monitor+0x503/0x8b0 kernel/rcu/tree.c:3632
   kfree_rcu_shrink_scan+0x245/0x3a0 kernel/rcu/tree.c:3966
   do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
   shrink_slab+0x32b/0x12a0 mm/shrinker.c:662
   shrink_one+0x47e/0x7b0 mm/vmscan.c:4818
   shrink_many mm/vmscan.c:4879 [inline]
   lru_gen_shrink_node mm/vmscan.c:4957 [inline]
   shrink_node+0x2452/0x39d0 mm/vmscan.c:5937
   kswapd_shrink_node mm/vmscan.c:6765 [inline]
   balance_pgdat+0xc19/0x18f0 mm/vmscan.c:6957
   kswapd+0x5ea/0xbf0 mm/vmscan.c:7226
   kthread+0x2c1/0x3a0 kernel/kthread.c:389
   ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
   ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

  Last potentially related work creation:
   kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
   __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
   kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3810
   subflow_ulp_release+0x2ae/0x350 net/mptcp/subflow.c:2009
   tcp_cleanup_ulp+0x7c/0x130 net/ipv4/tcp_ulp.c:124
   tcp_v4_destroy_sock+0x1c5/0x6a0 net/ipv4/tcp_ipv4.c:2541
   inet_csk_destroy_sock+0x1a3/0x440 net/ipv4/inet_connection_sock.c:1293
   tcp_done+0x252/0x350 net/ipv4/tcp.c:4870
   tcp_rcv_state_process+0x379b/0x4f30 net/ipv4/tcp_input.c:6933
   tcp_v4_do_rcv+0x1ad/0xa90 net/ipv4/tcp_ipv4.c:1938
   sk_backlog_rcv include/net/sock.h:1115 [inline]
   __release_sock+0x31b/0x400 net/core/sock.c:3072
   __tcp_close+0x4f3/0xff0 net/ipv4/tcp.c:3142
   __mptcp_close_ssk+0x331/0x14d0 net/mptcp/protocol.c:2489
   mptcp_close_ssk net/mptcp/protocol.c:2543 [inline]
   mptcp_close_ssk+0x150/0x220 net/mptcp/protocol.c:2526
   mptcp_pm_nl_rm_addr_or_subflow+0x2be/0xcc0 net/mptcp/pm_netlink.c:878
   mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:914 [inline]
   mptcp_nl_remove_id_zero_address+0x305/0x4a0 net/mptcp/pm_netlink.c:1572
   mptcp_pm_nl_del_addr_doit+0x5c9/0x770 net/mptcp/pm_netlink.c:1603
   genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
   genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
   genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
   netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
   genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
   netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
   netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
   netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
   sock_sendmsg_nosec net/socket.c:729 [inline]
   __sock_sendmsg net/socket.c:744 [inline]
   ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2607
   ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
   __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
   do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
   __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
   do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
   entry_SYSENTER_compat_after_hwframe+0x84/0x8e

  The buggy address belongs to the object at ffff8880569ac800
   which belongs to the cache kmalloc-512 of size 512
  The buggy address is located 88 bytes inside of
   freed 512-byte region [ffff8880569ac800, ffff8880569aca00)

  The buggy address belongs to the physical page:
  page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x569ac
  head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
  flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
  page_type: f5(slab)
  raw: 04fff00000000040 ffff88801ac42c80 dead000000000100 dead000000000122
  raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000
  head: 04fff00000000040 ffff88801ac42c80 dead000000000100 dead000000000122
  head: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000
  head: 04fff00000000002 ffffea00015a6b01 ffffffffffffffff 0000000000000000
  head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
  page dumped because: kasan: bad access detected
  page_owner tracks the page as allocated
  page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 10238, tgid 10238 (kworker/u32:6), ts 597403252405, free_ts 597177952947
   set_page_owner include/linux/page_owner.h:32 [inline]
   post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
   prep_new_page mm/page_alloc.c:1545 [inline]
   get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457
   __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
   alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
   alloc_slab_page mm/slub.c:2412 [inline]
   allocate_slab mm/slub.c:2578 [inline]
   new_slab+0x2ba/0x3f0 mm/slub.c:2631
   ___slab_alloc+0xd1d/0x16f0 mm/slub.c:3818
   __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
   __slab_alloc_node mm/slub.c:3961 [inline]
   slab_alloc_node mm/slub.c:4122 [inline]
   __kmalloc_cache_noprof+0x2c5/0x310 mm/slub.c:4290
   kmalloc_noprof include/linux/slab.h:878 [inline]
   kzalloc_noprof include/linux/slab.h:1014 [inline]
   mld_add_delrec net/ipv6/mcast.c:743 [inline]
   igmp6_leave_group net/ipv6/mcast.c:2625 [inline]
   igmp6_group_dropped+0x4ab/0xe40 net/ipv6/mcast.c:723
   __ipv6_dev_mc_dec+0x281/0x360 net/ipv6/mcast.c:979
   addrconf_leave_solict net/ipv6/addrconf.c:2253 [inline]
   __ipv6_ifa_notify+0x3f6/0xc30 net/ipv6/addrconf.c:6283
   addrconf_ifdown.isra.0+0xef9/0x1a20 net/ipv6/addrconf.c:3982
   addrconf_notify+0x220/0x19c0 net/ipv6/addrconf.c:3781
   notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
   call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
   call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
   call_netdevice_notifiers net/core/dev.c:2048 [inline]
   dev_close_many+0x333/0x6a0 net/core/dev.c:1589
  page last free pid 13136 tgid 13136 stack trace:
   reset_page_owner include/linux/page_owner.h:25 [inline]
   free_pages_prepare mm/page_alloc.c:1108 [inline]
   free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
   stack_depot_save_flags+0x2da/0x900 lib/stackdepot.c:666
   kasan_save_stack+0x42/0x60 mm/kasan/common.c:48
   kasan_save_track+0x14/0x30 mm/kasan/common.c:68
   unpoison_slab_object mm/kasan/common.c:319 [inline]
   __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
   kasan_slab_alloc include/linux/kasan.h:247 [inline]
   slab_post_alloc_hook mm/slub.c:4085 [inline]
   slab_alloc_node mm/slub.c:4134 [inline]
   kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141
   skb_clone+0x190/0x3f0 net/core/skbuff.c:2084
   do_one_broadcast net/netlink/af_netlink.c:1462 [inline]
   netlink_broadcast_filtered+0xb11/0xef0 net/netlink/af_netlink.c:1540
   netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1564
   uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
   kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
   kobject_uevent_env+0xacd/0x1670 lib/kobject_uevent.c:608
   device_del+0x623/0x9f0 drivers/base/core.c:3882
   snd_card_disconnect.part.0+0x58a/0x7c0 sound/core/init.c:546
   snd_card_disconnect+0x1f/0x30 sound/core/init.c:495
   snd_usx2y_disconnect+0xe9/0x1f0 sound/usb/usx2y/usbusx2y.c:417
   usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461
   device_remove drivers/base/dd.c:569 [inline]
   device_remove+0x122/0x170 drivers/base/dd.c:561

That's because 'subflow' is used just after 'mptcp_close_ssk(subflow)',
which will initiate the release of its memory. Even if it is very likely
the release and the re-utilisation will be done later on, it is of
course better to avoid any issues and read the content of 'subflow'
before closing it.

Fixes: 1c1f72137598 ("mptcp: pm: only decrement add_addr_accepted for MPJ req")
Cc: stable@vger.kernel.org
Reported-by: syzbot+3c8b7a8e7df6a2a226ca@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/670d7337.050a0220.4cbc0.004f.GAE@google.com
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/20241015-net-mptcp-uaf-pm-rm-v1-1-c4ee5d987a64@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mptcp/pm_netlink.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -877,12 +877,12 @@ static void mptcp_pm_nl_rm_addr_or_subfl
 				 i, rm_id, id, remote_id, msk->mpc_endpoint_id);
 			spin_unlock_bh(&msk->pm.lock);
 			mptcp_subflow_shutdown(sk, ssk, how);
+			removed |= subflow->request_join;
 
 			/* the following takes care of updating the subflows counter */
 			mptcp_close_ssk(sk, ssk, subflow);
 			spin_lock_bh(&msk->pm.lock);
 
-			removed |= subflow->request_join;
 			if (rm_type == MPTCP_MIB_RMSUBFLOW)
 				__MPTCP_INC_STATS(sock_net(sk), rm_type);
 		}

[PATCH 6.6 006/124] net: enetc: remove xdp_drops statistic from enetc_xdp_drop()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <wei.fang@nxp.com>

commit 412950d5746f7aa139e14fe95338694c1f09b595 upstream.

The xdp_drops statistic indicates the number of XDP frames dropped in
the Rx direction. However, enetc_xdp_drop() is also used in XDP_TX and
XDP_REDIRECT actions. If frame loss occurs in these two actions, the
frames loss count should not be included in xdp_drops, because there
are already xdp_tx_drops and xdp_redirect_failures to count the frame
loss of these two actions, so it's better to remove xdp_drops statistic
from enetc_xdp_drop() and increase xdp_drops in XDP_DROP action.

Fixes: 7ed2bc80074e ("net: enetc: add support for XDP_TX")
Cc: stable@vger.kernel.org
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241010092056.298128-2-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/enetc/enetc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -1524,7 +1524,6 @@ static void enetc_xdp_drop(struct enetc_
 				  &rx_ring->rx_swbd[rx_ring_first]);
 		enetc_bdr_idx_inc(rx_ring, &rx_ring_first);
 	}
-	rx_ring->stats.xdp_drops++;
 }
 
 static int enetc_clean_rx_ring_xdp(struct enetc_bdr *rx_ring,
@@ -1589,6 +1588,7 @@ static int enetc_clean_rx_ring_xdp(struc
 			fallthrough;
 		case XDP_DROP:
 			enetc_xdp_drop(rx_ring, orig_i, i);
+			rx_ring->stats.xdp_drops++;
 			break;
 		case XDP_PASS:
 			rxbd = orig_rxbd;

[PATCH 6.6 007/124] net: enetc: block concurrent XDP transmissions during ring reconfiguration

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <wei.fang@nxp.com>

commit c728a95ccf2a8ba544facfc30a4418d4c68c39f0 upstream.

When testing the XDP_REDIRECT function on the LS1028A platform, we
found a very reproducible issue that the Tx frames can no longer be
sent out even if XDP_REDIRECT is turned off. Specifically, if there
is a lot of traffic on Rx direction, when XDP_REDIRECT is turned on,
the console may display some warnings like "timeout for tx ring #6
clear", and all redirected frames will be dropped, the detailed log
is as follows.

root@ls1028ardb:~# ./xdp-bench redirect eno0 eno2
Redirecting from eno0 (ifindex 3; driver fsl_enetc) to eno2 (ifindex 4; driver fsl_enetc)
[203.849809] fsl_enetc 0000:00:00.2 eno2: timeout for tx ring #5 clear
[204.006051] fsl_enetc 0000:00:00.2 eno2: timeout for tx ring #6 clear
[204.161944] fsl_enetc 0000:00:00.2 eno2: timeout for tx ring #7 clear
eno0->eno2     1420505 rx/s       1420590 err,drop/s      0 xmit/s
  xmit eno0->eno2    0 xmit/s     1420590 drop/s     0 drv_err/s     15.71 bulk-avg
eno0->eno2     1420484 rx/s       1420485 err,drop/s      0 xmit/s
  xmit eno0->eno2    0 xmit/s     1420485 drop/s     0 drv_err/s     15.71 bulk-avg

By analyzing the XDP_REDIRECT implementation of enetc driver, the
driver will reconfigure Tx and Rx BD rings when a bpf program is
installed or uninstalled, but there is no mechanisms to block the
redirected frames when enetc driver reconfigures rings. Similarly,
XDP_TX verdicts on received frames can also lead to frames being
enqueued in the Tx rings. Because XDP ignores the state set by the
netif_tx_wake_queue() API, so introduce the ENETC_TX_DOWN flag to
suppress transmission of XDP frames.

Fixes: c33bfaf91c4c ("net: enetc: set up XDP program under enetc_reconfigure()")
Cc: stable@vger.kernel.org
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241010092056.298128-3-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/enetc/enetc.c |   14 ++++++++++++++
 drivers/net/ethernet/freescale/enetc/enetc.h |    1 +
 2 files changed, 15 insertions(+)

--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -902,6 +902,7 @@ static bool enetc_clean_tx_ring(struct e
 
 	if (unlikely(tx_frm_cnt && netif_carrier_ok(ndev) &&
 		     __netif_subqueue_stopped(ndev, tx_ring->index) &&
+		     !test_bit(ENETC_TX_DOWN, &priv->flags) &&
 		     (enetc_bd_unused(tx_ring) >= ENETC_TXBDS_MAX_NEEDED))) {
 		netif_wake_subqueue(ndev, tx_ring->index);
 	}
@@ -1380,6 +1381,9 @@ int enetc_xdp_xmit(struct net_device *nd
 	int xdp_tx_bd_cnt, i, k;
 	int xdp_tx_frm_cnt = 0;
 
+	if (unlikely(test_bit(ENETC_TX_DOWN, &priv->flags)))
+		return -ENETDOWN;
+
 	enetc_lock_mdio();
 
 	tx_ring = priv->xdp_tx_ring[smp_processor_id()];
@@ -1605,6 +1609,12 @@ static int enetc_clean_rx_ring_xdp(struc
 			break;
 		case XDP_TX:
 			tx_ring = priv->xdp_tx_ring[rx_ring->index];
+			if (unlikely(test_bit(ENETC_TX_DOWN, &priv->flags))) {
+				enetc_xdp_drop(rx_ring, orig_i, i);
+				tx_ring->stats.xdp_tx_drops++;
+				break;
+			}
+
 			xdp_tx_bd_cnt = enetc_rx_swbd_to_xdp_tx_swbd(xdp_tx_arr,
 								     rx_ring,
 								     orig_i, i);
@@ -2466,6 +2476,8 @@ void enetc_start(struct net_device *ndev
 	enetc_enable_bdrs(priv);
 
 	netif_tx_start_all_queues(ndev);
+
+	clear_bit(ENETC_TX_DOWN, &priv->flags);
 }
 EXPORT_SYMBOL_GPL(enetc_start);
 
@@ -2523,6 +2535,8 @@ void enetc_stop(struct net_device *ndev)
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	int i;
 
+	set_bit(ENETC_TX_DOWN, &priv->flags);
+
 	netif_tx_stop_all_queues(ndev);
 
 	enetc_disable_bdrs(priv);
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -328,6 +328,7 @@ enum enetc_active_offloads {
 
 enum enetc_flags_bit {
 	ENETC_TX_ONESTEP_TSTAMP_IN_PROGRESS = 0,
+	ENETC_TX_DOWN,
 };
 
 /* interrupt coalescing modes */

[PATCH 6.6 008/124] net: enetc: disable Tx BD rings after they are empty

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <wei.fang@nxp.com>

commit 0a93f2ca4be6c4616d371f18a3fabad2df7f8d55 upstream.

The Tx BD rings are disabled first in enetc_stop() and the driver
waits for them to become empty. This operation is not safe while
the ring is actively transmitting frames, and will cause the ring
to not be empty and hardware exception. As described in the NETC
block guide, software should only disable an active Tx ring after
all pending ring entries have been consumed (i.e. when PI = CI).
Disabling a transmit ring that is actively processing BDs risks
a HW-SW race hazard whereby a hardware resource becomes assigned
to work on one or more ring entries only to have those entries be
removed due to the ring becoming disabled.

When testing XDP_REDIRECT feautre, although all frames were blocked
from being put into Tx rings during ring reconfiguration, the similar
warning log was still encountered:

fsl_enetc 0000:00:00.2 eno2: timeout for tx ring #6 clear
fsl_enetc 0000:00:00.2 eno2: timeout for tx ring #7 clear

The reason is that when there are still unsent frames in the Tx ring,
disabling the Tx ring causes the remaining frames to be unable to be
sent out. And the Tx ring cannot be restored, which means that even
if the xdp program is uninstalled, the Tx frames cannot be sent out
anymore. Therefore, correct the operation order in enect_start() and
enect_stop().

Fixes: ff58fda09096 ("net: enetc: prioritize ability to go down over packet processing")
Cc: stable@vger.kernel.org
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241010092056.298128-4-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/enetc/enetc.c |   36 +++++++++++++++++++--------
 1 file changed, 26 insertions(+), 10 deletions(-)

--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -2236,18 +2236,24 @@ static void enetc_enable_rxbdr(struct en
 	enetc_rxbdr_wr(hw, idx, ENETC_RBMR, rbmr);
 }
 
-static void enetc_enable_bdrs(struct enetc_ndev_priv *priv)
+static void enetc_enable_rx_bdrs(struct enetc_ndev_priv *priv)
 {
 	struct enetc_hw *hw = &priv->si->hw;
 	int i;
 
-	for (i = 0; i < priv->num_tx_rings; i++)
-		enetc_enable_txbdr(hw, priv->tx_ring[i]);
-
 	for (i = 0; i < priv->num_rx_rings; i++)
 		enetc_enable_rxbdr(hw, priv->rx_ring[i]);
 }
 
+static void enetc_enable_tx_bdrs(struct enetc_ndev_priv *priv)
+{
+	struct enetc_hw *hw = &priv->si->hw;
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_enable_txbdr(hw, priv->tx_ring[i]);
+}
+
 static void enetc_disable_rxbdr(struct enetc_hw *hw, struct enetc_bdr *rx_ring)
 {
 	int idx = rx_ring->index;
@@ -2264,18 +2270,24 @@ static void enetc_disable_txbdr(struct e
 	enetc_txbdr_wr(hw, idx, ENETC_TBMR, 0);
 }
 
-static void enetc_disable_bdrs(struct enetc_ndev_priv *priv)
+static void enetc_disable_rx_bdrs(struct enetc_ndev_priv *priv)
 {
 	struct enetc_hw *hw = &priv->si->hw;
 	int i;
 
-	for (i = 0; i < priv->num_tx_rings; i++)
-		enetc_disable_txbdr(hw, priv->tx_ring[i]);
-
 	for (i = 0; i < priv->num_rx_rings; i++)
 		enetc_disable_rxbdr(hw, priv->rx_ring[i]);
 }
 
+static void enetc_disable_tx_bdrs(struct enetc_ndev_priv *priv)
+{
+	struct enetc_hw *hw = &priv->si->hw;
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_disable_txbdr(hw, priv->tx_ring[i]);
+}
+
 static void enetc_wait_txbdr(struct enetc_hw *hw, struct enetc_bdr *tx_ring)
 {
 	int delay = 8, timeout = 100;
@@ -2465,6 +2477,8 @@ void enetc_start(struct net_device *ndev
 
 	enetc_setup_interrupts(priv);
 
+	enetc_enable_tx_bdrs(priv);
+
 	for (i = 0; i < priv->bdr_int_num; i++) {
 		int irq = pci_irq_vector(priv->si->pdev,
 					 ENETC_BDR_INT_BASE_IDX + i);
@@ -2473,7 +2487,7 @@ void enetc_start(struct net_device *ndev
 		enable_irq(irq);
 	}
 
-	enetc_enable_bdrs(priv);
+	enetc_enable_rx_bdrs(priv);
 
 	netif_tx_start_all_queues(ndev);
 
@@ -2539,7 +2553,7 @@ void enetc_stop(struct net_device *ndev)
 
 	netif_tx_stop_all_queues(ndev);
 
-	enetc_disable_bdrs(priv);
+	enetc_disable_rx_bdrs(priv);
 
 	for (i = 0; i < priv->bdr_int_num; i++) {
 		int irq = pci_irq_vector(priv->si->pdev,
@@ -2552,6 +2566,8 @@ void enetc_stop(struct net_device *ndev)
 
 	enetc_wait_bdrs(priv);
 
+	enetc_disable_tx_bdrs(priv);
+
 	enetc_clear_interrupts(priv);
 }
 EXPORT_SYMBOL_GPL(enetc_stop);

[PATCH 6.6 009/124] net: enetc: disable NAPI after all rings are disabled

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <wei.fang@nxp.com>

commit 6b58fadd44aafbbd6af5f0b965063e1fd2063992 upstream.

When running "xdp-bench tx eno0" to test the XDP_TX feature of ENETC
on LS1028A, it was found that if the command was re-run multiple times,
Rx could not receive the frames, and the result of xdp-bench showed
that the rx rate was 0.

root@ls1028ardb:~# ./xdp-bench tx eno0
Hairpinning (XDP_TX) packets on eno0 (ifindex 3; driver fsl_enetc)
Summary                      2046 rx/s                  0 err,drop/s
Summary                         0 rx/s                  0 err,drop/s
Summary                         0 rx/s                  0 err,drop/s
Summary                         0 rx/s                  0 err,drop/s

By observing the Rx PIR and CIR registers, CIR is always 0x7FF and
PIR is always 0x7FE, which means that the Rx ring is full and can no
longer accommodate other Rx frames. Therefore, the problem is caused
by the Rx BD ring not being cleaned up.

Further analysis of the code revealed that the Rx BD ring will only
be cleaned if the "cleaned_cnt > xdp_tx_in_flight" condition is met.
Therefore, some debug logs were added to the driver and the current
values of cleaned_cnt and xdp_tx_in_flight were printed when the Rx
BD ring was full. The logs are as follows.

[  178.762419] [XDP TX] >> cleaned_cnt:1728, xdp_tx_in_flight:2140
[  178.771387] [XDP TX] >> cleaned_cnt:1941, xdp_tx_in_flight:2110
[  178.776058] [XDP TX] >> cleaned_cnt:1792, xdp_tx_in_flight:2110

>From the results, the max value of xdp_tx_in_flight has reached 2140.
However, the size of the Rx BD ring is only 2048. So xdp_tx_in_flight
did not drop to 0 after enetc_stop() is called and the driver does not
clear it. The root cause is that NAPI is disabled too aggressively,
without having waited for the pending XDP_TX frames to be transmitted,
and their buffers recycled, so that xdp_tx_in_flight cannot naturally
drop to 0. Later, enetc_free_tx_ring() does free those stale, unsent
XDP_TX packets, but it is not coded up to also reset xdp_tx_in_flight,
hence the manifestation of the bug.

One option would be to cover this extra condition in enetc_free_tx_ring(),
but now that the ENETC_TX_DOWN exists, we have created a window at
the beginning of enetc_stop() where NAPI can still be scheduled, but
any concurrent enqueue will be blocked. Therefore, enetc_wait_bdrs()
and enetc_disable_tx_bdrs() can be called with NAPI still scheduled,
and it is guaranteed that this will not wait indefinitely, but instead
give us an indication that the pending TX frames have orderly dropped
to zero. Only then should we call napi_disable().

This way, enetc_free_tx_ring() becomes entirely redundant and can be
dropped as part of subsequent cleanup.

The change also refactors enetc_start() so that it looks like the
mirror opposite procedure of enetc_stop().

Fixes: ff58fda09096 ("net: enetc: prioritize ability to go down over packet processing")
Cc: stable@vger.kernel.org
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241010092056.298128-5-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/enetc/enetc.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -2477,8 +2477,6 @@ void enetc_start(struct net_device *ndev
 
 	enetc_setup_interrupts(priv);
 
-	enetc_enable_tx_bdrs(priv);
-
 	for (i = 0; i < priv->bdr_int_num; i++) {
 		int irq = pci_irq_vector(priv->si->pdev,
 					 ENETC_BDR_INT_BASE_IDX + i);
@@ -2487,6 +2485,8 @@ void enetc_start(struct net_device *ndev
 		enable_irq(irq);
 	}
 
+	enetc_enable_tx_bdrs(priv);
+
 	enetc_enable_rx_bdrs(priv);
 
 	netif_tx_start_all_queues(ndev);
@@ -2555,6 +2555,10 @@ void enetc_stop(struct net_device *ndev)
 
 	enetc_disable_rx_bdrs(priv);
 
+	enetc_wait_bdrs(priv);
+
+	enetc_disable_tx_bdrs(priv);
+
 	for (i = 0; i < priv->bdr_int_num; i++) {
 		int irq = pci_irq_vector(priv->si->pdev,
 					 ENETC_BDR_INT_BASE_IDX + i);
@@ -2564,10 +2568,6 @@ void enetc_stop(struct net_device *ndev)
 		napi_disable(&priv->int_vector[i]->napi);
 	}
 
-	enetc_wait_bdrs(priv);
-
-	enetc_disable_tx_bdrs(priv);
-
 	enetc_clear_interrupts(priv);
 }
 EXPORT_SYMBOL_GPL(enetc_stop);

[PATCH 6.6 010/124] net: enetc: add missing static descriptor and inline keyword

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <wei.fang@nxp.com>

commit 1d7b2ce43d2c22a21dadaf689cb36a69570346a6 upstream.

Fix the build warnings when CONFIG_FSL_ENETC_MDIO is not enabled.
The detailed warnings are shown as follows.

include/linux/fsl/enetc_mdio.h:62:18: warning: no previous prototype for function 'enetc_hw_alloc' [-Wmissing-prototypes]
      62 | struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
         |                  ^
include/linux/fsl/enetc_mdio.h:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      62 | struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
         | ^
         | static
8 warnings generated.

Fixes: 6517798dd343 ("enetc: Make MDIO accessors more generic and export to include/linux/fsl")
Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202410102136.jQHZOcS4-lkp@intel.com/
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241011030103.392362-1-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/fsl/enetc_mdio.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/include/linux/fsl/enetc_mdio.h
+++ b/include/linux/fsl/enetc_mdio.h
@@ -59,7 +59,8 @@ static inline int enetc_mdio_read_c45(st
 static inline int enetc_mdio_write_c45(struct mii_bus *bus, int phy_id,
 				       int devad, int regnum, u16 value)
 { return -EINVAL; }
-struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
+static inline struct enetc_hw *enetc_hw_alloc(struct device *dev,
+					      void __iomem *port_regs)
 { return ERR_PTR(-EINVAL); }
 
 #endif

[PATCH 6.6 011/124] posix-clock: Fix missing timespec64 check in pc_clock_settime()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jinjie Ruan <ruanjinjie@huawei.com>

commit d8794ac20a299b647ba9958f6d657051fc51a540 upstream.

As Andrew pointed out, it will make sense that the PTP core
checked timespec64 struct's tv_sec and tv_nsec range before calling
ptp->info->settime64().

As the man manual of clock_settime() said, if tp.tv_sec is negative or
tp.tv_nsec is outside the range [0..999,999,999], it should return EINVAL,
which include dynamic clocks which handles PTP clock, and the condition is
consistent with timespec64_valid(). As Thomas suggested, timespec64_valid()
only check the timespec is valid, but not ensure that the time is
in a valid range, so check it ahead using timespec64_valid_strict()
in pc_clock_settime() and return -EINVAL if not valid.

There are some drivers that use tp->tv_sec and tp->tv_nsec directly to
write registers without validity checks and assume that the higher layer
has checked it, which is dangerous and will benefit from this, such as
hclge_ptp_settime(), igb_ptp_settime_i210(), _rcar_gen4_ptp_settime(),
and some drivers can remove the checks of itself.

Cc: stable@vger.kernel.org
Fixes: 0606f422b453 ("posix clocks: Introduce dynamic clocks")
Acked-by: Richard Cochran <richardcochran@gmail.com>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20241009072302.1754567-2-ruanjinjie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 kernel/time/posix-clock.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/kernel/time/posix-clock.c
+++ b/kernel/time/posix-clock.c
@@ -299,6 +299,9 @@ static int pc_clock_settime(clockid_t id
 		goto out;
 	}
 
+	if (!timespec64_valid_strict(ts))
+		return -EINVAL;
+
 	if (cd.clk->ops.clock_settime)
 		err = cd.clk->ops.clock_settime(cd.clk, ts);
 	else

[PATCH 6.6 012/124] arm64: probes: Remove broken LDR (literal) uprobe support

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Rutland <mark.rutland@arm.com>

commit acc450aa07099d071b18174c22a1119c57da8227 upstream.

The simulate_ldr_literal() and simulate_ldrsw_literal() functions are
unsafe to use for uprobes. Both functions were originally written for
use with kprobes, and access memory with plain C accesses. When uprobes
was added, these were reused unmodified even though they cannot safely
access user memory.

There are three key problems:

1) The plain C accesses do not have corresponding extable entries, and
   thus if they encounter a fault the kernel will treat these as
   unintentional accesses to user memory, resulting in a BUG() which
   will kill the kernel thread, and likely lead to further issues (e.g.
   lockup or panic()).

2) The plain C accesses are subject to HW PAN and SW PAN, and so when
   either is in use, any attempt to simulate an access to user memory
   will fault. Thus neither simulate_ldr_literal() nor
   simulate_ldrsw_literal() can do anything useful when simulating a
   user instruction on any system with HW PAN or SW PAN.

3) The plain C accesses are privileged, as they run in kernel context,
   and in practice can access a small range of kernel virtual addresses.
   The instructions they simulate have a range of +/-1MiB, and since the
   simulated instructions must itself be a user instructions in the
   TTBR0 address range, these can address the final 1MiB of the TTBR1
   acddress range by wrapping downwards from an address in the first
   1MiB of the TTBR0 address range.

   In contemporary kernels the last 8MiB of TTBR1 address range is
   reserved, and accesses to this will always fault, meaning this is no
   worse than (1).

   Historically, it was theoretically possible for the linear map or
   vmemmap to spill into the final 8MiB of the TTBR1 address range, but
   in practice this is extremely unlikely to occur as this would
   require either:

   * Having enough physical memory to fill the entire linear map all the
     way to the final 1MiB of the TTBR1 address range.

   * Getting unlucky with KASLR randomization of the linear map such
     that the populated region happens to overlap with the last 1MiB of
     the TTBR address range.

   ... and in either case if we were to spill into the final page there
   would be larger problems as the final page would alias with error
   pointers.

Practically speaking, (1) and (2) are the big issues. Given there have
been no reports of problems since the broken code was introduced, it
appears that no-one is relying on probing these instructions with
uprobes.

Avoid these issues by not allowing uprobes on LDR (literal) and LDRSW
(literal), limiting the use of simulate_ldr_literal() and
simulate_ldrsw_literal() to kprobes. Attempts to place uprobes on LDR
(literal) and LDRSW (literal) will be rejected as
arm_probe_decode_insn() will return INSN_REJECTED. In future we can
consider introducing working uprobes support for these instructions, but
this will require more significant work.

Fixes: 9842ceae9fa8 ("arm64: Add uprobe support")
Cc: stable@vger.kernel.org
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20241008155851.801546-2-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm64/kernel/probes/decode-insn.c |   16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

--- a/arch/arm64/kernel/probes/decode-insn.c
+++ b/arch/arm64/kernel/probes/decode-insn.c
@@ -99,10 +99,6 @@ arm_probe_decode_insn(probe_opcode_t ins
 	    aarch64_insn_is_blr(insn) ||
 	    aarch64_insn_is_ret(insn)) {
 		api->handler = simulate_br_blr_ret;
-	} else if (aarch64_insn_is_ldr_lit(insn)) {
-		api->handler = simulate_ldr_literal;
-	} else if (aarch64_insn_is_ldrsw_lit(insn)) {
-		api->handler = simulate_ldrsw_literal;
 	} else {
 		/*
 		 * Instruction cannot be stepped out-of-line and we don't
@@ -140,6 +136,17 @@ arm_kprobe_decode_insn(kprobe_opcode_t *
 	probe_opcode_t insn = le32_to_cpu(*addr);
 	probe_opcode_t *scan_end = NULL;
 	unsigned long size = 0, offset = 0;
+	struct arch_probe_insn *api = &asi->api;
+
+	if (aarch64_insn_is_ldr_lit(insn)) {
+		api->handler = simulate_ldr_literal;
+		decoded = INSN_GOOD_NO_SLOT;
+	} else if (aarch64_insn_is_ldrsw_lit(insn)) {
+		api->handler = simulate_ldrsw_literal;
+		decoded = INSN_GOOD_NO_SLOT;
+	} else {
+		decoded = arm_probe_decode_insn(insn, &asi->api);
+	}
 
 	/*
 	 * If there's a symbol defined in front of and near enough to
@@ -157,7 +164,6 @@ arm_kprobe_decode_insn(kprobe_opcode_t *
 		else
 			scan_end = addr - MAX_ATOMIC_CONTEXT_SIZE;
 	}
-	decoded = arm_probe_decode_insn(insn, &asi->api);
 
 	if (decoded != INSN_REJECTED && scan_end)
 		if (is_probed_address_atomic(addr - 1, scan_end))

[PATCH 6.6 013/124] arm64: probes: Fix simulate_ldr*_literal()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Rutland <mark.rutland@arm.com>

commit 50f813e57601c22b6f26ced3193b9b94d70a2640 upstream.

The simulate_ldr_literal() code always loads a 64-bit quantity, and when
simulating a 32-bit load into a 'W' register, it discards the most
significant 32 bits. For big-endian kernels this means that the relevant
bits are discarded, and the value returned is the the subsequent 32 bits
in memory (i.e. the value at addr + 4).

Additionally, simulate_ldr_literal() and simulate_ldrsw_literal() use a
plain C load, which the compiler may tear or elide (e.g. if the target
is the zero register). Today this doesn't happen to matter, but it may
matter in future if trampoline code uses a LDR (literal) or LDRSW
(literal).

Update simulate_ldr_literal() and simulate_ldrsw_literal() to use an
appropriately-sized READ_ONCE() to perform the access, which avoids
these problems.

Fixes: 39a67d49ba35 ("arm64: kprobes instruction simulation support")
Cc: stable@vger.kernel.org
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20241008155851.801546-3-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm64/kernel/probes/simulate-insn.c |   18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

--- a/arch/arm64/kernel/probes/simulate-insn.c
+++ b/arch/arm64/kernel/probes/simulate-insn.c
@@ -171,17 +171,15 @@ simulate_tbz_tbnz(u32 opcode, long addr,
 void __kprobes
 simulate_ldr_literal(u32 opcode, long addr, struct pt_regs *regs)
 {
-	u64 *load_addr;
+	unsigned long load_addr;
 	int xn = opcode & 0x1f;
-	int disp;
 
-	disp = ldr_displacement(opcode);
-	load_addr = (u64 *) (addr + disp);
+	load_addr = addr + ldr_displacement(opcode);
 
 	if (opcode & (1 << 30))	/* x0-x30 */
-		set_x_reg(regs, xn, *load_addr);
+		set_x_reg(regs, xn, READ_ONCE(*(u64 *)load_addr));
 	else			/* w0-w30 */
-		set_w_reg(regs, xn, *load_addr);
+		set_w_reg(regs, xn, READ_ONCE(*(u32 *)load_addr));
 
 	instruction_pointer_set(regs, instruction_pointer(regs) + 4);
 }
@@ -189,14 +187,12 @@ simulate_ldr_literal(u32 opcode, long ad
 void __kprobes
 simulate_ldrsw_literal(u32 opcode, long addr, struct pt_regs *regs)
 {
-	s32 *load_addr;
+	unsigned long load_addr;
 	int xn = opcode & 0x1f;
-	int disp;
 
-	disp = ldr_displacement(opcode);
-	load_addr = (s32 *) (addr + disp);
+	load_addr = addr + ldr_displacement(opcode);
 
-	set_x_reg(regs, xn, *load_addr);
+	set_x_reg(regs, xn, READ_ONCE(*(s32 *)load_addr));
 
 	instruction_pointer_set(regs, instruction_pointer(regs) + 4);
 }

[PATCH 6.6 014/124] arm64: probes: Fix uprobes for big-endian kernels

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Rutland <mark.rutland@arm.com>

commit 13f8f1e05f1dc36dbba6cba0ae03354c0dafcde7 upstream.

The arm64 uprobes code is broken for big-endian kernels as it doesn't
convert the in-memory instruction encoding (which is always
little-endian) into the kernel's native endianness before analyzing and
simulating instructions. This may result in a few distinct problems:

* The kernel may may erroneously reject probing an instruction which can
  safely be probed.

* The kernel may erroneously erroneously permit stepping an
  instruction out-of-line when that instruction cannot be stepped
  out-of-line safely.

* The kernel may erroneously simulate instruction incorrectly dur to
  interpretting the byte-swapped encoding.

The endianness mismatch isn't caught by the compiler or sparse because:

* The arch_uprobe::{insn,ixol} fields are encoded as arrays of u8, so
  the compiler and sparse have no idea these contain a little-endian
  32-bit value. The core uprobes code populates these with a memcpy()
  which similarly does not handle endianness.

* While the uprobe_opcode_t type is an alias for __le32, both
  arch_uprobe_analyze_insn() and arch_uprobe_skip_sstep() cast from u8[]
  to the similarly-named probe_opcode_t, which is an alias for u32.
  Hence there is no endianness conversion warning.

Fix this by changing the arch_uprobe::{insn,ixol} fields to __le32 and
adding the appropriate __le32_to_cpu() conversions prior to consuming
the instruction encoding. The core uprobes copies these fields as opaque
ranges of bytes, and so is unaffected by this change.

At the same time, remove MAX_UINSN_BYTES and consistently use
AARCH64_INSN_SIZE for clarity.

Tested with the following:

| #include <stdio.h>
| #include <stdbool.h>
|
| #define noinline __attribute__((noinline))
|
| static noinline void *adrp_self(void)
| {
|         void *addr;
|
|         asm volatile(
|         "       adrp    %x0, adrp_self\n"
|         "       add     %x0, %x0, :lo12:adrp_self\n"
|         : "=r" (addr));
| }
|
|
| int main(int argc, char *argv)
| {
|         void *ptr = adrp_self();
|         bool equal = (ptr == adrp_self);
|
|         printf("adrp_self   => %p\n"
|                "adrp_self() => %p\n"
|                "%s\n",
|                adrp_self, ptr, equal ? "EQUAL" : "NOT EQUAL");
|
|         return 0;
| }

.... where the adrp_self() function was compiled to:

| 00000000004007e0 <adrp_self>:
|   4007e0:       90000000        adrp    x0, 400000 <__ehdr_start>
|   4007e4:       911f8000        add     x0, x0, #0x7e0
|   4007e8:       d65f03c0        ret

Before this patch, the ADRP is not recognized, and is assumed to be
steppable, resulting in corruption of the result:

| # ./adrp-self
| adrp_self   => 0x4007e0
| adrp_self() => 0x4007e0
| EQUAL
| # echo 'p /root/adrp-self:0x007e0' > /sys/kernel/tracing/uprobe_events
| # echo 1 > /sys/kernel/tracing/events/uprobes/enable
| # ./adrp-self
| adrp_self   => 0x4007e0
| adrp_self() => 0xffffffffff7e0
| NOT EQUAL

After this patch, the ADRP is correctly recognized and simulated:

| # ./adrp-self
| adrp_self   => 0x4007e0
| adrp_self() => 0x4007e0
| EQUAL
| #
| # echo 'p /root/adrp-self:0x007e0' > /sys/kernel/tracing/uprobe_events
| # echo 1 > /sys/kernel/tracing/events/uprobes/enable
| # ./adrp-self
| adrp_self   => 0x4007e0
| adrp_self() => 0x4007e0
| EQUAL

Fixes: 9842ceae9fa8 ("arm64: Add uprobe support")
Cc: stable@vger.kernel.org
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20241008155851.801546-4-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm64/include/asm/uprobes.h   |    8 +++-----
 arch/arm64/kernel/probes/uprobes.c |    4 ++--
 2 files changed, 5 insertions(+), 7 deletions(-)

--- a/arch/arm64/include/asm/uprobes.h
+++ b/arch/arm64/include/asm/uprobes.h
@@ -10,11 +10,9 @@
 #include <asm/insn.h>
 #include <asm/probes.h>
 
-#define MAX_UINSN_BYTES		AARCH64_INSN_SIZE
-
 #define UPROBE_SWBP_INSN	cpu_to_le32(BRK64_OPCODE_UPROBES)
 #define UPROBE_SWBP_INSN_SIZE	AARCH64_INSN_SIZE
-#define UPROBE_XOL_SLOT_BYTES	MAX_UINSN_BYTES
+#define UPROBE_XOL_SLOT_BYTES	AARCH64_INSN_SIZE
 
 typedef __le32 uprobe_opcode_t;
 
@@ -23,8 +21,8 @@ struct arch_uprobe_task {
 
 struct arch_uprobe {
 	union {
-		u8 insn[MAX_UINSN_BYTES];
-		u8 ixol[MAX_UINSN_BYTES];
+		__le32 insn;
+		__le32 ixol;
 	};
 	struct arch_probe_insn api;
 	bool simulate;
--- a/arch/arm64/kernel/probes/uprobes.c
+++ b/arch/arm64/kernel/probes/uprobes.c
@@ -42,7 +42,7 @@ int arch_uprobe_analyze_insn(struct arch
 	else if (!IS_ALIGNED(addr, AARCH64_INSN_SIZE))
 		return -EINVAL;
 
-	insn = *(probe_opcode_t *)(&auprobe->insn[0]);
+	insn = le32_to_cpu(auprobe->insn);
 
 	switch (arm_probe_decode_insn(insn, &auprobe->api)) {
 	case INSN_REJECTED:
@@ -108,7 +108,7 @@ bool arch_uprobe_skip_sstep(struct arch_
 	if (!auprobe->simulate)
 		return false;
 
-	insn = *(probe_opcode_t *)(&auprobe->insn[0]);
+	insn = le32_to_cpu(auprobe->insn);
 	addr = instruction_pointer(regs);
 
 	if (auprobe->api.handler)

[PATCH 6.6 015/124] net: macb: Avoid 20s boot delay by skipping MDIO bus registration for fixed-link PHY

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleksij Rempel <o.rempel@pengutronix.de>

commit d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 upstream.

A boot delay was introduced by commit 79540d133ed6 ("net: macb: Fix
handling of fixed-link node"). This delay was caused by the call to
`mdiobus_register()` in cases where a fixed-link PHY was present. The
MDIO bus registration triggered unnecessary PHY address scans, leading
to a 20-second delay due to attempts to detect Clause 45 (C45)
compatible PHYs, despite no MDIO bus being attached.

The commit 79540d133ed6 ("net: macb: Fix handling of fixed-link node")
was originally introduced to fix a regression caused by commit
7897b071ac3b4 ("net: macb: convert to phylink"), which caused the driver
to misinterpret fixed-link nodes as PHY nodes. This resulted in warnings
like:
mdio_bus f0028000.ethernet-ffffffff: fixed-link has invalid PHY address
mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 0
...
mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 31

This patch reworks the logic to avoid registering and allocation of the
MDIO bus when:
  - The device tree contains a fixed-link node.
  - There is no "mdio" child node in the device tree.

If a child node named "mdio" exists, the MDIO bus will be registered to
support PHYs  attached to the MACB's MDIO bus. Otherwise, with only a
fixed-link, the MDIO bus is skipped.

Tested on a sama5d35 based system with a ksz8863 switch attached to
macb0.

Fixes: 79540d133ed6 ("net: macb: Fix handling of fixed-link node")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: stable@vger.kernel.org
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241013052916.3115142-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/cadence/macb_main.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -930,9 +930,6 @@ static int macb_mdiobus_register(struct
 		return ret;
 	}
 
-	if (of_phy_is_fixed_link(np))
-		return mdiobus_register(bp->mii_bus);
-
 	/* Only create the PHY from the device tree if at least one PHY is
 	 * described. Otherwise scan the entire MDIO bus. We do this to support
 	 * old device tree that did not follow the best practices and did not
@@ -953,8 +950,19 @@ static int macb_mdiobus_register(struct
 
 static int macb_mii_init(struct macb *bp)
 {
+	struct device_node *child, *np = bp->pdev->dev.of_node;
 	int err = -ENXIO;
 
+	/* With fixed-link, we don't need to register the MDIO bus,
+	 * except if we have a child named "mdio" in the device tree.
+	 * In that case, some devices may be attached to the MACB's MDIO bus.
+	 */
+	child = of_get_child_by_name(np, "mdio");
+	if (child)
+		of_node_put(child);
+	else if (of_phy_is_fixed_link(np))
+		return macb_mii_probe(bp->dev);
+
 	/* Enable management port */
 	macb_writel(bp, NCR, MACB_BIT(MPE));
 

[PATCH 6.6 016/124] net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jinjie Ruan <ruanjinjie@huawei.com>

commit 217a3d98d1e9891a8b1438a27dfbc64ddf01f691 upstream.

Commit a3c1e45156ad ("net: microchip: vcap: Fix use-after-free error in
kunit test") fixed the use-after-free error, but introduced below
memory leaks by removing necessary vcap_free_rule(), add it to fix it.

	unreferenced object 0xffffff80ca58b700 (size 192):
	  comm "kunit_try_catch", pid 1215, jiffies 4294898264
	  hex dump (first 32 bytes):
	    00 12 7a 00 05 00 00 00 0a 00 00 00 64 00 00 00  ..z.........d...
	    00 00 00 00 00 00 00 00 00 04 0b cc 80 ff ff ff  ................
	  backtrace (crc 9c09c3fe):
	    [<0000000052a0be73>] kmemleak_alloc+0x34/0x40
	    [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4
	    [<0000000040a01b8d>] vcap_alloc_rule+0x3cc/0x9c4
	    [<000000003fe86110>] vcap_api_encode_rule_test+0x1ac/0x16b0
	    [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac
	    [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec
	    [<00000000c5d82c9a>] kthread+0x2e8/0x374
	    [<00000000f4287308>] ret_from_fork+0x10/0x20
	unreferenced object 0xffffff80cc0b0400 (size 64):
	  comm "kunit_try_catch", pid 1215, jiffies 4294898265
	  hex dump (first 32 bytes):
	    80 04 0b cc 80 ff ff ff 18 b7 58 ca 80 ff ff ff  ..........X.....
	    39 00 00 00 02 00 00 00 06 05 04 03 02 01 ff ff  9...............
	  backtrace (crc daf014e9):
	    [<0000000052a0be73>] kmemleak_alloc+0x34/0x40
	    [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4
	    [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528
	    [<00000000dfdb1e81>] vcap_api_encode_rule_test+0x224/0x16b0
	    [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac
	    [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec
	    [<00000000c5d82c9a>] kthread+0x2e8/0x374
	    [<00000000f4287308>] ret_from_fork+0x10/0x20
	unreferenced object 0xffffff80cc0b0700 (size 64):
	  comm "kunit_try_catch", pid 1215, jiffies 4294898265
	  hex dump (first 32 bytes):
	    80 07 0b cc 80 ff ff ff 28 b7 58 ca 80 ff ff ff  ........(.X.....
	    3c 00 00 00 00 00 00 00 01 2f 03 b3 ec ff ff ff  <......../......
	  backtrace (crc 8d877792):
	    [<0000000052a0be73>] kmemleak_alloc+0x34/0x40
	    [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4
	    [<000000006eadfab7>] vcap_rule_add_action+0x2d0/0x52c
	    [<00000000323475d1>] vcap_api_encode_rule_test+0x4d4/0x16b0
	    [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac
	    [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec
	    [<00000000c5d82c9a>] kthread+0x2e8/0x374
	    [<00000000f4287308>] ret_from_fork+0x10/0x20
	unreferenced object 0xffffff80cc0b0900 (size 64):
	  comm "kunit_try_catch", pid 1215, jiffies 4294898266
	  hex dump (first 32 bytes):
	    80 09 0b cc 80 ff ff ff 80 06 0b cc 80 ff ff ff  ................
	    7d 00 00 00 01 00 00 00 00 00 00 00 ff 00 00 00  }...............
	  backtrace (crc 34181e56):
	    [<0000000052a0be73>] kmemleak_alloc+0x34/0x40
	    [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4
	    [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528
	    [<00000000991e3564>] vcap_val_rule+0xcf0/0x13e8
	    [<00000000fc9868e5>] vcap_api_encode_rule_test+0x678/0x16b0
	    [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac
	    [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec
	    [<00000000c5d82c9a>] kthread+0x2e8/0x374
	    [<00000000f4287308>] ret_from_fork+0x10/0x20
	unreferenced object 0xffffff80cc0b0980 (size 64):
	  comm "kunit_try_catch", pid 1215, jiffies 4294898266
	  hex dump (first 32 bytes):
	    18 b7 58 ca 80 ff ff ff 00 09 0b cc 80 ff ff ff  ..X.............
	    67 00 00 00 00 00 00 00 01 01 74 88 c0 ff ff ff  g.........t.....
	  backtrace (crc 275fd9be):
	    [<0000000052a0be73>] kmemleak_alloc+0x34/0x40
	    [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4
	    [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528
	    [<000000001396a1a2>] test_add_def_fields+0xb0/0x100
	    [<000000006e7621f0>] vcap_val_rule+0xa98/0x13e8
	    [<00000000fc9868e5>] vcap_api_encode_rule_test+0x678/0x16b0
	    [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac
	    [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec
	    [<00000000c5d82c9a>] kthread+0x2e8/0x374
	    [<00000000f4287308>] ret_from_fork+0x10/0x20
	......

Cc: stable@vger.kernel.org
Fixes: a3c1e45156ad ("net: microchip: vcap: Fix use-after-free error in kunit test")
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jens Emil Schulz Østergaard <jensemil.schulzostergaard@microchip.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20241014121922.1280583-1-ruanjinjie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/microchip/vcap/vcap_api_kunit.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_kunit.c b/drivers/net/ethernet/microchip/vcap/vcap_api_kunit.c
index f2a5a36fdacd..7251121ab196 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api_kunit.c
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api_kunit.c
@@ -1444,6 +1444,8 @@ static void vcap_api_encode_rule_test(struct kunit *test)
 
 	ret = vcap_del_rule(&test_vctrl, &test_netdev, id);
 	KUNIT_EXPECT_EQ(test, 0, ret);
+
+	vcap_free_rule(rule);
 }
 
 static void vcap_api_set_rule_counter_test(struct kunit *test)
-- 
2.47.0

[PATCH 6.6 017/124] irqchip/gic-v3-its: Fix VSYNC referencing an unmapped VPE on GIC v4.1

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nianyao Tang <tangnianyao@huawei.com>

commit 80e9963fb3b5509dfcabe9652d56bf4b35542055 upstream.

As per the GICv4.1 spec (Arm IHI 0069H, 5.3.19):

 "A VMAPP with {V, Alloc}=={0, x} is self-synchronizing, This means the ITS
  command queue does not show the command as consumed until all of its
  effects are completed."

Furthermore, VSYNC is allowed to deliver an SError when referencing a
non existent VPE.

By these definitions, a VMAPP followed by a VSYNC is a bug, as the
later references a VPE that has been unmapped by the former.

Fix it by eliding the VSYNC in this scenario.

Fixes: 64edfaa9a234 ("irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP")
Signed-off-by: Nianyao Tang <tangnianyao@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20240406022737.3898763-1-tangnianyao@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-gic-v3-its.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -786,6 +786,7 @@ static struct its_vpe *its_build_vmapp_c
 					   struct its_cmd_block *cmd,
 					   struct its_cmd_desc *desc)
 {
+	struct its_vpe *vpe = valid_vpe(its, desc->its_vmapp_cmd.vpe);
 	unsigned long vpt_addr, vconf_addr;
 	u64 target;
 	bool alloc;
@@ -798,6 +799,11 @@ static struct its_vpe *its_build_vmapp_c
 		if (is_v4_1(its)) {
 			alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count);
 			its_encode_alloc(cmd, alloc);
+			/*
+			 * Unmapping a VPE is self-synchronizing on GICv4.1,
+			 * no need to issue a VSYNC.
+			 */
+			vpe = NULL;
 		}
 
 		goto out;
@@ -832,7 +838,7 @@ static struct its_vpe *its_build_vmapp_c
 out:
 	its_fixup_cmd(cmd);
 
-	return valid_vpe(its, desc->its_vmapp_cmd.vpe);
+	return vpe;
 }
 
 static struct its_vpe *its_build_vmapti_cmd(struct its_node *its,

[PATCH 6.6 018/124] fat: fix uninitialized variable

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

commit 963a7f4d3b90ee195b895ca06b95757fcba02d1a upstream.

syszbot produced this with a corrupted fs image.  In theory, however an IO
error would trigger this also.

This affects just an error report, so should not be a serious error.

Link: https://lkml.kernel.org/r/87r08wjsnh.fsf@mail.parknet.co.jp
Link: https://lkml.kernel.org/r/66ff2c95.050a0220.49194.03e9.GAE@google.com
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reported-by: syzbot+ef0d7bc412553291aa86@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/fat/namei_vfat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1037,7 +1037,7 @@ error_inode:
 	if (corrupt < 0) {
 		fat_fs_error(new_dir->i_sb,
 			     "%s: Filesystem corrupted (i_pos %lld)",
-			     __func__, sinfo.i_pos);
+			     __func__, new_i_pos);
 	}
 	goto out;
 }

[PATCH 6.6 019/124] selftests/mm: replace atomic_bool with pthread_barrier_t

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Edward Liaw <edliaw@google.com>

commit e61ef21e27e8deed8c474e9f47f4aa7bc37e138c upstream.

Patch series "selftests/mm: fix deadlock after pthread_create".

On Android arm, pthread_create followed by a fork caused a deadlock in the
case where the fork required work to be completed by the created thread.

Update the synchronization primitive to use pthread_barrier instead of
atomic_bool.

Apply the same fix to the wp-fork-with-event test.


This patch (of 2):

Swap synchronization primitive with pthread_barrier, so that stdatomic.h
does not need to be included.

The synchronization is needed on Android ARM64; we see a deadlock with
pthread_create when the parent thread races forward before the child has a
chance to start doing work.

Link: https://lkml.kernel.org/r/20241003211716.371786-1-edliaw@google.com
Link: https://lkml.kernel.org/r/20241003211716.371786-2-edliaw@google.com
Fixes: cff294582798 ("selftests/mm: extend and rename uffd pagemap test")
Signed-off-by: Edward Liaw <edliaw@google.com>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/mm/uffd-common.c     |    5 +++--
 tools/testing/selftests/mm/uffd-common.h     |    3 +--
 tools/testing/selftests/mm/uffd-unit-tests.c |   14 ++++++++------
 3 files changed, 12 insertions(+), 10 deletions(-)

--- a/tools/testing/selftests/mm/uffd-common.c
+++ b/tools/testing/selftests/mm/uffd-common.c
@@ -17,7 +17,7 @@ bool map_shared;
 bool test_uffdio_wp = true;
 unsigned long long *count_verify;
 uffd_test_ops_t *uffd_test_ops;
-atomic_bool ready_for_fork;
+pthread_barrier_t ready_for_fork;
 
 static int uffd_mem_fd_create(off_t mem_size, bool hugetlb)
 {
@@ -508,7 +508,8 @@ void *uffd_poll_thread(void *arg)
 	pollfd[1].fd = pipefd[cpu*2];
 	pollfd[1].events = POLLIN;
 
-	ready_for_fork = true;
+	/* Ready for parent thread to fork */
+	pthread_barrier_wait(&ready_for_fork);
 
 	for (;;) {
 		ret = poll(pollfd, 2, -1);
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -33,7 +33,6 @@
 #include <inttypes.h>
 #include <stdint.h>
 #include <sys/random.h>
-#include <stdatomic.h>
 
 #include "../kselftest.h"
 #include "vm_util.h"
@@ -99,7 +98,7 @@ extern bool map_shared;
 extern bool test_uffdio_wp;
 extern unsigned long long *count_verify;
 extern volatile bool test_uffdio_copy_eexist;
-extern atomic_bool ready_for_fork;
+extern pthread_barrier_t ready_for_fork;
 
 extern uffd_test_ops_t anon_uffd_test_ops;
 extern uffd_test_ops_t shmem_uffd_test_ops;
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -770,7 +770,7 @@ static void uffd_sigbus_test_common(bool
 	char c;
 	struct uffd_args args = { 0 };
 
-	ready_for_fork = false;
+	pthread_barrier_init(&ready_for_fork, NULL, 2);
 
 	fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
 
@@ -787,8 +787,9 @@ static void uffd_sigbus_test_common(bool
 	if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
 		err("uffd_poll_thread create");
 
-	while (!ready_for_fork)
-		; /* Wait for the poll_thread to start executing before forking */
+	/* Wait for child thread to start before forking */
+	pthread_barrier_wait(&ready_for_fork);
+	pthread_barrier_destroy(&ready_for_fork);
 
 	pid = fork();
 	if (pid < 0)
@@ -829,7 +830,7 @@ static void uffd_events_test_common(bool
 	char c;
 	struct uffd_args args = { 0 };
 
-	ready_for_fork = false;
+	pthread_barrier_init(&ready_for_fork, NULL, 2);
 
 	fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
 	if (uffd_register(uffd, area_dst, nr_pages * page_size,
@@ -840,8 +841,9 @@ static void uffd_events_test_common(bool
 	if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
 		err("uffd_poll_thread create");
 
-	while (!ready_for_fork)
-		; /* Wait for the poll_thread to start executing before forking */
+	/* Wait for child thread to start before forking */
+	pthread_barrier_wait(&ready_for_fork);
+	pthread_barrier_destroy(&ready_for_fork);
 
 	pid = fork();
 	if (pid < 0)

[PATCH 6.6 020/124] selftests/mm: fix deadlock for fork after pthread_create on ARM

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Edward Liaw <edliaw@google.com>

commit e142cc87ac4ec618f2ccf5f68aedcd6e28a59d9d upstream.

On Android with arm, there is some synchronization needed to avoid a
deadlock when forking after pthread_create.

Link: https://lkml.kernel.org/r/20241003211716.371786-3-edliaw@google.com
Fixes: cff294582798 ("selftests/mm: extend and rename uffd pagemap test")
Signed-off-by: Edward Liaw <edliaw@google.com>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/mm/uffd-unit-tests.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -237,6 +237,9 @@ static void *fork_event_consumer(void *d
 	fork_event_args *args = data;
 	struct uffd_msg msg = { 0 };
 
+	/* Ready for parent thread to fork */
+	pthread_barrier_wait(&ready_for_fork);
+
 	/* Read until a full msg received */
 	while (uffd_read_msg(args->parent_uffd, &msg));
 
@@ -304,8 +307,12 @@ static int pagemap_test_fork(int uffd, b
 
 	/* Prepare a thread to resolve EVENT_FORK */
 	if (with_event) {
+		pthread_barrier_init(&ready_for_fork, NULL, 2);
 		if (pthread_create(&thread, NULL, fork_event_consumer, &args))
 			err("pthread_create()");
+		/* Wait for child thread to start before forking */
+		pthread_barrier_wait(&ready_for_fork);
+		pthread_barrier_destroy(&ready_for_fork);
 	}
 
 	child = fork();

[PATCH 6.6 021/124] mm/mremap: fix move_normal_pmd/retract_page_tables race

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jann Horn <jannh@google.com>

commit 6fa1066fc5d00cb9f1b0e83b7ff6ef98d26ba2aa upstream.

In mremap(), move_page_tables() looks at the type of the PMD entry and the
specified address range to figure out by which method the next chunk of
page table entries should be moved.

At that point, the mmap_lock is held in write mode, but no rmap locks are
held yet.  For PMD entries that point to page tables and are fully covered
by the source address range, move_pgt_entry(NORMAL_PMD, ...) is called,
which first takes rmap locks, then does move_normal_pmd().
move_normal_pmd() takes the necessary page table locks at source and
destination, then moves an entire page table from the source to the
destination.

The problem is: The rmap locks, which protect against concurrent page
table removal by retract_page_tables() in the THP code, are only taken
after the PMD entry has been read and it has been decided how to move it.
So we can race as follows (with two processes that have mappings of the
same tmpfs file that is stored on a tmpfs mount with huge=advise); note
that process A accesses page tables through the MM while process B does it
through the file rmap:

process A                      process B
=========                      =========
mremap
  mremap_to
    move_vma
      move_page_tables
        get_old_pmd
        alloc_new_pmd
                      *** PREEMPT ***
                               madvise(MADV_COLLAPSE)
                                 do_madvise
                                   madvise_walk_vmas
                                     madvise_vma_behavior
                                       madvise_collapse
                                         hpage_collapse_scan_file
                                           collapse_file
                                             retract_page_tables
                                               i_mmap_lock_read(mapping)
                                               pmdp_collapse_flush
                                               i_mmap_unlock_read(mapping)
        move_pgt_entry(NORMAL_PMD, ...)
          take_rmap_locks
          move_normal_pmd
          drop_rmap_locks

When this happens, move_normal_pmd() can end up creating bogus PMD entries
in the line `pmd_populate(mm, new_pmd, pmd_pgtable(pmd))`.  The effect
depends on arch-specific and machine-specific details; on x86, you can end
up with physical page 0 mapped as a page table, which is likely
exploitable for user->kernel privilege escalation.

Fix the race by letting process B recheck that the PMD still points to a
page table after the rmap locks have been taken.  Otherwise, we bail and
let the caller fall back to the PTE-level copying path, which will then
bail immediately at the pmd_none() check.

Bug reachability: Reaching this bug requires that you can create
shmem/file THP mappings - anonymous THP uses different code that doesn't
zap stuff under rmap locks.  File THP is gated on an experimental config
flag (CONFIG_READ_ONLY_THP_FOR_FS), so on normal distro kernels you need
shmem THP to hit this bug.  As far as I know, getting shmem THP normally
requires that you can mount your own tmpfs with the right mount flags,
which would require creating your own user+mount namespace; though I don't
know if some distros maybe enable shmem THP by default or something like
that.

Bug impact: This issue can likely be used for user->kernel privilege
escalation when it is reachable.

Link: https://lkml.kernel.org/r/20241007-move_normal_pmd-vs-collapse-fix-2-v1-1-5ead9631f2ea@google.com
Fixes: 1d65b771bc08 ("mm/khugepaged: retract_page_tables() without mmap or vma lock")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Co-developed-by: David Hildenbrand <david@redhat.com>
Closes: https://project-zero.issues.chromium.org/371047675
Acked-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/mremap.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index 24712f8dbb6b..dda09e957a5d 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -238,6 +238,7 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr,
 {
 	spinlock_t *old_ptl, *new_ptl;
 	struct mm_struct *mm = vma->vm_mm;
+	bool res = false;
 	pmd_t pmd;
 
 	if (!arch_supports_page_table_move())
@@ -277,19 +278,25 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr,
 	if (new_ptl != old_ptl)
 		spin_lock_nested(new_ptl, SINGLE_DEPTH_NESTING);
 
-	/* Clear the pmd */
 	pmd = *old_pmd;
+
+	/* Racing with collapse? */
+	if (unlikely(!pmd_present(pmd) || pmd_leaf(pmd)))
+		goto out_unlock;
+	/* Clear the pmd */
 	pmd_clear(old_pmd);
+	res = true;
 
 	VM_BUG_ON(!pmd_none(*new_pmd));
 
 	pmd_populate(mm, new_pmd, pmd_pgtable(pmd));
 	flush_tlb_range(vma, old_addr, old_addr + PMD_SIZE);
+out_unlock:
 	if (new_ptl != old_ptl)
 		spin_unlock(new_ptl);
 	spin_unlock(old_ptl);
 
-	return true;
+	return res;
 }
 #else
 static inline bool move_normal_pmd(struct vm_area_struct *vma,
-- 
2.47.0

[PATCH 6.6 022/124] mm/mglru: only clear kswapd_failures if reclaimable

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Xu <weixugc@google.com>

commit b130ba4a6259f6b64d8af15e9e7ab1e912bcb7ad upstream.

lru_gen_shrink_node() unconditionally clears kswapd_failures, which can
prevent kswapd from sleeping and cause 100% kswapd cpu usage even when
kswapd repeatedly fails to make progress in reclaim.

Only clear kswap_failures in lru_gen_shrink_node() if reclaim makes some
progress, similar to shrink_node().

I happened to run into this problem in one of my tests recently.  It
requires a combination of several conditions: The allocator needs to
allocate a right amount of pages such that it can wake up kswapd
without itself being OOM killed; there is no memory for kswapd to
reclaim (My test disables swap and cleans page cache first); no other
process frees enough memory at the same time.

Link: https://lkml.kernel.org/r/20241014221211.832591-1-weixugc@google.com
Fixes: e4dde56cd208 ("mm: multi-gen LRU: per-node lru_gen_folio lists")
Signed-off-by: Wei Xu <weixugc@google.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Jan Alexander Steffens <heftig@archlinux.org>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/vmscan.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -5603,8 +5603,8 @@ static void lru_gen_shrink_node(struct p
 
 	blk_finish_plug(&plug);
 done:
-	/* kswapd should never fail */
-	pgdat->kswapd_failures = 0;
+	if (sc->nr_reclaimed > reclaimed)
+		pgdat->kswapd_failures = 0;
 }
 
 /******************************************************************************

[PATCH 6.6 023/124] mm/swapfile: skip HugeTLB pages for unuse_vma

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Liu Shixin <liushixin2@huawei.com>

commit 7528c4fb1237512ee18049f852f014eba80bbe8d upstream.

I got a bad pud error and lost a 1GB HugeTLB when calling swapoff.  The
problem can be reproduced by the following steps:

 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.
 2. Swapout the above anonymous memory.
 3. run swapoff and we will get a bad pud error in kernel message:

  mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)

We can tell that pud_clear_bad is called by pud_none_or_clear_bad in
unuse_pud_range() by ftrace.  And therefore the HugeTLB pages will never
be freed because we lost it from page table.  We can skip HugeTLB pages
for unuse_vma to fix it.

Link: https://lkml.kernel.org/r/20241015014521.570237-1-liushixin2@huawei.com
Fixes: 0fe6e20b9c4c ("hugetlb, rmap: add reverse mapping for hugepage")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Muchun Song <muchun.song@linux.dev>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/swapfile.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2003,7 +2003,7 @@ static int unuse_mm(struct mm_struct *mm
 
 	mmap_read_lock(mm);
 	for_each_vma(vmi, vma) {
-		if (vma->anon_vma) {
+		if (vma->anon_vma && !is_vm_hugetlb_page(vma)) {
 			ret = unuse_vma(vma, type);
 			if (ret)
 				break;

[PATCH 6.6 024/124] xfs: fix error returns from xfs_bmapi_write

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christoph Hellwig <hch@lst.de>

commit 6773da870ab89123d1b513da63ed59e32a29cb77 upstream.

[backport: resolve conflicts due to missing quota_repair.c,
rtbitmap_repair.c, xfs_bmap_mark_sick()]

xfs_bmapi_write can return 0 without actually returning a mapping in
mval in two different cases:

 1) when there is absolutely no space available to do an allocation
 2) when converting delalloc space, and the allocation is so small
    that it only covers parts of the delalloc extent before the
    range requested by the caller

Callers at best can handle one of these cases, but in many cases can't
cope with either one.  Switch xfs_bmapi_write to always return a
mapping or return an error code instead.  For case 1) above ENOSPC is
the obvious choice which is very much what the callers expect anyway.
For case 2) there is no really good error code, so pick a funky one
from the SysV streams portfolio.

This fixes the reproducer here:

    https://lore.kernel.org/linux-xfs/CAEJPjCvT3Uag-pMTYuigEjWZHn1sGMZ0GCjVVCv29tNHK76Cgg@mail.gmail.com0/

which uses reserved blocks to create file systems that are gravely
out of space and thus cause at least xfs_file_alloc_space to hang
and trigger the lack of ENOSPC handling in xfs_dquot_disk_alloc.

Note that this patch does not actually make any caller but
xfs_alloc_file_space deal intelligently with case 2) above.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: 刘通 <lyutoon@gmail.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_attr_remote.c |    1 
 fs/xfs/libxfs/xfs_bmap.c        |   46 ++++++++++++++++++++++++++++++++--------
 fs/xfs/libxfs/xfs_da_btree.c    |   20 ++++-------------
 fs/xfs/xfs_bmap_util.c          |   31 +++++++++++++-------------
 fs/xfs/xfs_dquot.c              |    1 
 fs/xfs/xfs_iomap.c              |    8 ------
 fs/xfs/xfs_reflink.c            |   14 ------------
 fs/xfs/xfs_rtalloc.c            |    2 -
 8 files changed, 57 insertions(+), 66 deletions(-)

--- a/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -619,7 +619,6 @@ xfs_attr_rmtval_set_blk(
 	if (error)
 		return error;
 
-	ASSERT(nmap == 1);
 	ASSERT((map->br_startblock != DELAYSTARTBLOCK) &&
 	       (map->br_startblock != HOLESTARTBLOCK));
 
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4128,8 +4128,10 @@ xfs_bmapi_allocate(
 	} else {
 		error = xfs_bmap_alloc_userdata(bma);
 	}
-	if (error || bma->blkno == NULLFSBLOCK)
+	if (error)
 		return error;
+	if (bma->blkno == NULLFSBLOCK)
+		return -ENOSPC;
 
 	if (bma->flags & XFS_BMAPI_ZERO) {
 		error = xfs_zero_extent(bma->ip, bma->blkno, bma->length);
@@ -4309,6 +4311,15 @@ xfs_bmapi_finish(
  * extent state if necessary.  Details behaviour is controlled by the flags
  * parameter.  Only allocates blocks from a single allocation group, to avoid
  * locking problems.
+ *
+ * Returns 0 on success and places the extent mappings in mval.  nmaps is used
+ * as an input/output parameter where the caller specifies the maximum number
+ * of mappings that may be returned and xfs_bmapi_write passes back the number
+ * of mappings (including existing mappings) it found.
+ *
+ * Returns a negative error code on failure, including -ENOSPC when it could not
+ * allocate any blocks and -ENOSR when it did allocate blocks to convert a
+ * delalloc range, but those blocks were before the passed in range.
  */
 int
 xfs_bmapi_write(
@@ -4436,10 +4447,16 @@ xfs_bmapi_write(
 			ASSERT(len > 0);
 			ASSERT(bma.length > 0);
 			error = xfs_bmapi_allocate(&bma);
-			if (error)
+			if (error) {
+				/*
+				 * If we already allocated space in a previous
+				 * iteration return what we go so far when
+				 * running out of space.
+				 */
+				if (error == -ENOSPC && bma.nallocs)
+					break;
 				goto error0;
-			if (bma.blkno == NULLFSBLOCK)
-				break;
+			}
 
 			/*
 			 * If this is a CoW allocation, record the data in
@@ -4477,7 +4494,6 @@ xfs_bmapi_write(
 		if (!xfs_iext_next_extent(ifp, &bma.icur, &bma.got))
 			eof = true;
 	}
-	*nmap = n;
 
 	error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags,
 			whichfork);
@@ -4488,7 +4504,22 @@ xfs_bmapi_write(
 	       ifp->if_nextents > XFS_IFORK_MAXEXT(ip, whichfork));
 	xfs_bmapi_finish(&bma, whichfork, 0);
 	xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
-		orig_nmap, *nmap);
+		orig_nmap, n);
+
+	/*
+	 * When converting delayed allocations, xfs_bmapi_allocate ignores
+	 * the passed in bno and always converts from the start of the found
+	 * delalloc extent.
+	 *
+	 * To avoid a successful return with *nmap set to 0, return the magic
+	 * -ENOSR error code for this particular case so that the caller can
+	 * handle it.
+	 */
+	if (!n) {
+		ASSERT(bma.nallocs >= *nmap);
+		return -ENOSR;
+	}
+	*nmap = n;
 	return 0;
 error0:
 	xfs_bmapi_finish(&bma, whichfork, error);
@@ -4595,9 +4626,6 @@ xfs_bmapi_convert_delalloc(
 	if (error)
 		goto out_finish;
 
-	error = -ENOSPC;
-	if (WARN_ON_ONCE(bma.blkno == NULLFSBLOCK))
-		goto out_finish;
 	error = -EFSCORRUPTED;
 	if (WARN_ON_ONCE(!xfs_valid_startblock(ip, bma.got.br_startblock)))
 		goto out_finish;
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -2158,8 +2158,8 @@ xfs_da_grow_inode_int(
 	struct xfs_inode	*dp = args->dp;
 	int			w = args->whichfork;
 	xfs_rfsblock_t		nblks = dp->i_nblocks;
-	struct xfs_bmbt_irec	map, *mapp;
-	int			nmap, error, got, i, mapi;
+	struct xfs_bmbt_irec	map, *mapp = &map;
+	int			nmap, error, got, i, mapi = 1;
 
 	/*
 	 * Find a spot in the file space to put the new block.
@@ -2175,14 +2175,7 @@ xfs_da_grow_inode_int(
 	error = xfs_bmapi_write(tp, dp, *bno, count,
 			xfs_bmapi_aflag(w)|XFS_BMAPI_METADATA|XFS_BMAPI_CONTIG,
 			args->total, &map, &nmap);
-	if (error)
-		return error;
-
-	ASSERT(nmap <= 1);
-	if (nmap == 1) {
-		mapp = &map;
-		mapi = 1;
-	} else if (nmap == 0 && count > 1) {
+	if (error == -ENOSPC && count > 1) {
 		xfs_fileoff_t		b;
 		int			c;
 
@@ -2199,16 +2192,13 @@ xfs_da_grow_inode_int(
 					args->total, &mapp[mapi], &nmap);
 			if (error)
 				goto out_free_map;
-			if (nmap < 1)
-				break;
 			mapi += nmap;
 			b = mapp[mapi - 1].br_startoff +
 			    mapp[mapi - 1].br_blockcount;
 		}
-	} else {
-		mapi = 0;
-		mapp = NULL;
 	}
+	if (error)
+		goto out_free_map;
 
 	/*
 	 * Count the blocks we got, make sure it matches the total.
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -868,33 +868,32 @@ xfs_alloc_file_space(
 		if (error)
 			goto error;
 
-		error = xfs_bmapi_write(tp, ip, startoffset_fsb,
-				allocatesize_fsb, XFS_BMAPI_PREALLOC, 0, imapp,
-				&nimaps);
-		if (error)
-			goto error;
-
-		ip->i_diflags |= XFS_DIFLAG_PREALLOC;
-		xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-
-		error = xfs_trans_commit(tp);
-		xfs_iunlock(ip, XFS_ILOCK_EXCL);
-		if (error)
-			break;
-
 		/*
 		 * If the allocator cannot find a single free extent large
 		 * enough to cover the start block of the requested range,
-		 * xfs_bmapi_write will return 0 but leave *nimaps set to 0.
+		 * xfs_bmapi_write will return -ENOSR.
 		 *
 		 * In that case we simply need to keep looping with the same
 		 * startoffset_fsb so that one of the following allocations
 		 * will eventually reach the requested range.
 		 */
-		if (nimaps) {
+		error = xfs_bmapi_write(tp, ip, startoffset_fsb,
+				allocatesize_fsb, XFS_BMAPI_PREALLOC, 0, imapp,
+				&nimaps);
+		if (error) {
+			if (error != -ENOSR)
+				goto error;
+			error = 0;
+		} else {
 			startoffset_fsb += imapp->br_blockcount;
 			allocatesize_fsb -= imapp->br_blockcount;
 		}
+
+		ip->i_diflags |= XFS_DIFLAG_PREALLOC;
+		xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+		error = xfs_trans_commit(tp);
+		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	}
 
 	return error;
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -333,7 +333,6 @@ xfs_dquot_disk_alloc(
 		goto err_cancel;
 
 	ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
-	ASSERT(nmaps == 1);
 	ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
 	       (map.br_startblock != HOLESTARTBLOCK));
 
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -317,14 +317,6 @@ xfs_iomap_write_direct(
 	if (error)
 		goto out_unlock;
 
-	/*
-	 * Copy any maps to caller's array and return any error.
-	 */
-	if (nimaps == 0) {
-		error = -ENOSPC;
-		goto out_unlock;
-	}
-
 	if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock)))
 		error = xfs_alert_fsblock_zero(ip, imap);
 
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -429,13 +429,6 @@ xfs_reflink_fill_cow_hole(
 	if (error)
 		return error;
 
-	/*
-	 * Allocation succeeded but the requested range was not even partially
-	 * satisfied?  Bail out!
-	 */
-	if (nimaps == 0)
-		return -ENOSPC;
-
 convert:
 	return xfs_reflink_convert_unwritten(ip, imap, cmap, convert_now);
 
@@ -498,13 +491,6 @@ xfs_reflink_fill_delalloc(
 		error = xfs_trans_commit(tp);
 		if (error)
 			return error;
-
-		/*
-		 * Allocation succeeded but the requested range was not even
-		 * partially satisfied?  Bail out!
-		 */
-		if (nimaps == 0)
-			return -ENOSPC;
 	} while (cmap->br_startoff + cmap->br_blockcount <= imap->br_startoff);
 
 	return xfs_reflink_convert_unwritten(ip, imap, cmap, convert_now);
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -840,8 +840,6 @@ xfs_growfs_rt_alloc(
 		nmap = 1;
 		error = xfs_bmapi_write(tp, ip, oblocks, nblocks - oblocks,
 					XFS_BMAPI_METADATA, 0, &map, &nmap);
-		if (!error && nmap < 1)
-			error = -ENOSPC;
 		if (error)
 			goto out_trans_cancel;
 		/*

[PATCH 6.6 025/124] xfs: fix xfs_bmap_add_extent_delay_real for partial conversions

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christoph Hellwig <hch@lst.de>

commit d69bee6a35d3c5e4873b9e164dd1a9711351a97c upstream.

[backport: resolve conflict due to xfs_mod_freecounter refactor]

xfs_bmap_add_extent_delay_real takes parts or all of a delalloc extent
and converts them to a real extent.  It is written to deal with any
potential overlap of the to be converted range with the delalloc extent,
but it turns out that currently only converting the entire extents, or a
part starting at the beginning is actually exercised, as the only caller
always tries to convert the entire delalloc extent, and either succeeds
or at least progresses partially from the start.

If it only converts a tiny part of a delalloc extent, the indirect block
calculation for the new delalloc extent (da_new) might be equivalent to that
of the existing delalloc extent (da_old).  If this extent conversion now
requires allocating an indirect block that gets accounted into da_new,
leading to the assert that da_new must be smaller or equal to da_new
unless we split the extent to trigger.

Except for the assert that case is actually handled by just trying to
allocate more space, as that already handled for the split case (which
currently can't be reached at all), so just reusing it should be fine.
Except that without dipping into the reserved block pool that would make
it a bit too easy to trigger a fs shutdown due to ENOSPC.  So in addition
to adjusting the assert, also dip into the reserved block pool.

Note that I could only reproduce the assert with a change to only convert
the actually asked range instead of the full delalloc extent from
xfs_bmapi_write.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_bmap.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -1549,6 +1549,7 @@ xfs_bmap_add_extent_delay_real(
 			if (error)
 				goto done;
 		}
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
@@ -1578,6 +1579,7 @@ xfs_bmap_add_extent_delay_real(
 			if (error)
 				goto done;
 		}
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
@@ -1611,6 +1613,7 @@ xfs_bmap_add_extent_delay_real(
 			if (error)
 				goto done;
 		}
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
@@ -1643,6 +1646,7 @@ xfs_bmap_add_extent_delay_real(
 				goto done;
 			}
 		}
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
@@ -1680,6 +1684,7 @@ xfs_bmap_add_extent_delay_real(
 			if (error)
 				goto done;
 		}
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_LEFT_FILLING:
@@ -1767,6 +1772,7 @@ xfs_bmap_add_extent_delay_real(
 		xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV);
 		xfs_iext_next(ifp, &bma->icur);
 		xfs_iext_update_extent(bma->ip, state, &bma->icur, &RIGHT);
+		ASSERT(da_new <= da_old);
 		break;
 
 	case BMAP_RIGHT_FILLING:
@@ -1814,6 +1820,7 @@ xfs_bmap_add_extent_delay_real(
 		PREV.br_blockcount = temp;
 		xfs_iext_insert(bma->ip, &bma->icur, &PREV, state);
 		xfs_iext_next(ifp, &bma->icur);
+		ASSERT(da_new <= da_old);
 		break;
 
 	case 0:
@@ -1934,11 +1941,9 @@ xfs_bmap_add_extent_delay_real(
 	}
 
 	/* adjust for changes in reserved delayed indirect blocks */
-	if (da_new != da_old) {
-		ASSERT(state == 0 || da_new < da_old);
+	if (da_new != da_old)
 		error = xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new),
-				false);
-	}
+				true);
 
 	xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork);
 done:

[PATCH 6.6 026/124] xfs: remove a racy if_bytes check in xfs_reflink_end_cow_extent

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christoph Hellwig <hch@lst.de>

commit 86de848403abda05bf9c16dcdb6bef65a8d88c41 upstream.

Accessing if_bytes without the ilock is racy.  Remove the initial
if_bytes == 0 check in xfs_reflink_end_cow_extent and let
ext_iext_lookup_extent fail for this case after we've taken the ilock.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_reflink.c |    6 ------
 1 file changed, 6 deletions(-)

--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -716,12 +716,6 @@ xfs_reflink_end_cow_extent(
 	int			nmaps;
 	int			error;
 
-	/* No COW extents?  That's easy! */
-	if (ifp->if_bytes == 0) {
-		*offset_fsb = end_fsb;
-		return 0;
-	}
-
 	resblks = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK);
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, resblks, 0,
 			XFS_TRANS_RESERVE, &tp);

[PATCH 6.6 027/124] xfs: require XFS_SB_FEAT_INCOMPAT_LOG_XATTRS for attr log intent item recovery

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 8ef1d96a985e4dc07ffbd71bd7fc5604a80cc644 upstream.

The XFS_SB_FEAT_INCOMPAT_LOG_XATTRS feature bit protects a filesystem
from old kernels that do not know how to recover extended attribute log
intent items.  Make this check mandatory instead of a debugging assert.

Fixes: fd920008784ea ("xfs: Set up infrastructure for log attribute replay")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_attr_item.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -510,6 +510,9 @@ xfs_attri_validate(
 	unsigned int			op = attrp->alfi_op_flags &
 					     XFS_ATTRI_OP_FLAGS_TYPE_MASK;
 
+	if (!xfs_sb_version_haslogxattrs(&mp->m_sb))
+		return false;
+
 	if (attrp->__pad != 0)
 		return false;
 
@@ -602,8 +605,6 @@ xfs_attri_item_recover(
 	args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
 			 XFS_DA_OP_LOGGED;
 
-	ASSERT(xfs_sb_version_haslogxattrs(&mp->m_sb));
-
 	switch (attr->xattri_op_flags) {
 	case XFS_ATTRI_OP_FLAGS_SET:
 	case XFS_ATTRI_OP_FLAGS_REPLACE:

[PATCH 6.6 028/124] xfs: check opcode and iovec count match in xlog_recover_attri_commit_pass2

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit ad206ae50eca62836c5460ab5bbf2a6c59a268e7 upstream.

Check that the number of recovered log iovecs is what is expected for
the xattri opcode is expecting.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_attr_item.c |   27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -719,6 +719,7 @@ xlog_recover_attri_commit_pass2(
 	const void			*attr_value = NULL;
 	const void			*attr_name;
 	size_t				len;
+	unsigned int			op;
 
 	attri_formatp = item->ri_buf[0].i_addr;
 	attr_name = item->ri_buf[1].i_addr;
@@ -737,6 +738,32 @@ xlog_recover_attri_commit_pass2(
 		return -EFSCORRUPTED;
 	}
 
+	/* Check the number of log iovecs makes sense for the op code. */
+	op = attri_formatp->alfi_op_flags & XFS_ATTRI_OP_FLAGS_TYPE_MASK;
+	switch (op) {
+	case XFS_ATTRI_OP_FLAGS_SET:
+	case XFS_ATTRI_OP_FLAGS_REPLACE:
+		/* Log item, attr name, attr value */
+		if (item->ri_total != 3) {
+			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+					     attri_formatp, len);
+			return -EFSCORRUPTED;
+		}
+		break;
+	case XFS_ATTRI_OP_FLAGS_REMOVE:
+		/* Log item, attr name */
+		if (item->ri_total != 2) {
+			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+					     attri_formatp, len);
+			return -EFSCORRUPTED;
+		}
+		break;
+	default:
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+				     attri_formatp, len);
+		return -EFSCORRUPTED;
+	}
+
 	/* Validate the attr name */
 	if (item->ri_buf[1].i_len !=
 			xlog_calc_iovec_len(attri_formatp->alfi_name_len)) {

[PATCH 6.6 029/124] xfs: fix missing check for invalid attr flags

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit f660ec8eaeb50d0317c29601aacabdb15e5f2203 upstream.

[backport: fix build errors in xchk_xattr_listent]

The xattr scrubber doesn't check for undefined flags in shortform attr
entries.  Therefore, define a mask XFS_ATTR_ONDISK_MASK that has all
possible XFS_ATTR_* flags in it, and use that to check for unknown bits
in xchk_xattr_actor.

Refactor the check in the dabtree scanner function to use the new mask
as well.  The redundant checks need to be in place because the dabtree
check examines the hash mappings and therefore needs to decode the attr
leaf entries to compute the namehash.  This happens before the walk of
the xattr entries themselves.

Fixes: ae0506eba78fd ("xfs: check used space of shortform xattr structures")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_da_format.h |    5 +++++
 fs/xfs/scrub/attr.c           |   13 +++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)

--- a/fs/xfs/libxfs/xfs_da_format.h
+++ b/fs/xfs/libxfs/xfs_da_format.h
@@ -703,8 +703,13 @@ struct xfs_attr3_leafblock {
 #define XFS_ATTR_ROOT		(1u << XFS_ATTR_ROOT_BIT)
 #define XFS_ATTR_SECURE		(1u << XFS_ATTR_SECURE_BIT)
 #define XFS_ATTR_INCOMPLETE	(1u << XFS_ATTR_INCOMPLETE_BIT)
+
 #define XFS_ATTR_NSP_ONDISK_MASK	(XFS_ATTR_ROOT | XFS_ATTR_SECURE)
 
+#define XFS_ATTR_ONDISK_MASK	(XFS_ATTR_NSP_ONDISK_MASK | \
+				 XFS_ATTR_LOCAL | \
+				 XFS_ATTR_INCOMPLETE)
+
 /*
  * Alignment for namelist and valuelist entries (since they are mixed
  * there can be only one alignment value)
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -182,6 +182,11 @@ xchk_xattr_listent(
 		return;
 	}
 
+	if (flags & ~XFS_ATTR_ONDISK_MASK) {
+		xchk_fblock_set_corrupt(sx->sc, XFS_ATTR_FORK, args.blkno);
+		goto fail_xref;
+	}
+
 	if (flags & XFS_ATTR_INCOMPLETE) {
 		/* Incomplete attr key, just mark the inode for preening. */
 		xchk_ino_set_preen(sx->sc, context->dp->i_ino);
@@ -463,7 +468,6 @@ xchk_xattr_rec(
 	xfs_dahash_t			hash;
 	int				nameidx;
 	int				hdrsize;
-	unsigned int			badflags;
 	int				error;
 
 	ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
@@ -493,10 +497,11 @@ xchk_xattr_rec(
 
 	/* Retrieve the entry and check it. */
 	hash = be32_to_cpu(ent->hashval);
-	badflags = ~(XFS_ATTR_LOCAL | XFS_ATTR_ROOT | XFS_ATTR_SECURE |
-			XFS_ATTR_INCOMPLETE);
-	if ((ent->flags & badflags) != 0)
+	if (ent->flags & ~XFS_ATTR_ONDISK_MASK) {
 		xchk_da_set_corrupt(ds, level);
+		return 0;
+	}
+
 	if (ent->flags & XFS_ATTR_LOCAL) {
 		lentry = (struct xfs_attr_leaf_name_local *)
 				(((char *)bp->b_addr) + nameidx);

[PATCH 6.6 030/124] xfs: check shortform attr entry flags specifically

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 309dc9cbbb4379241bcc9b5a6a42c04279a0e5a7 upstream.

While reviewing flag checking in the attr scrub functions, we noticed
that the shortform attr scanner didn't catch entries that have the LOCAL
or INCOMPLETE bits set.  Neither of these flags can ever be set on a
shortform attr, so we need to check this narrower set of valid flags.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/scrub/attr.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -566,6 +566,15 @@ xchk_xattr_check_sf(
 			break;
 		}
 
+		/*
+		 * Shortform entries do not set LOCAL or INCOMPLETE, so the
+		 * only valid flag bits here are for namespaces.
+		 */
+		if (sfe->flags & ~XFS_ATTR_NSP_ONDISK_MASK) {
+			xchk_fblock_set_corrupt(sc, XFS_ATTR_FORK, 0);
+			break;
+		}
+
 		if (!xchk_xattr_set_map(sc, ab->usedmap,
 				(char *)sfe - (char *)sf,
 				sizeof(struct xfs_attr_sf_entry))) {

[PATCH 6.6 031/124] xfs: validate recovered name buffers when recovering xattr items

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 1c7f09d210aba2f2bb206e2e8c97c9f11a3fd880 upstream.

Strengthen the xattri log item recovery code by checking that we
actually have the required name and newname buffers for whatever
operation we're replaying.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_attr_item.c |   58 +++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 47 insertions(+), 11 deletions(-)

--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -719,22 +719,20 @@ xlog_recover_attri_commit_pass2(
 	const void			*attr_value = NULL;
 	const void			*attr_name;
 	size_t				len;
-	unsigned int			op;
-
-	attri_formatp = item->ri_buf[0].i_addr;
-	attr_name = item->ri_buf[1].i_addr;
+	unsigned int			op, i = 0;
 
 	/* Validate xfs_attri_log_format before the large memory allocation */
 	len = sizeof(struct xfs_attri_log_format);
-	if (item->ri_buf[0].i_len != len) {
+	if (item->ri_buf[i].i_len != len) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 				item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
 		return -EFSCORRUPTED;
 	}
 
+	attri_formatp = item->ri_buf[i].i_addr;
 	if (!xfs_attri_validate(mp, attri_formatp)) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-				item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
+				attri_formatp, len);
 		return -EFSCORRUPTED;
 	}
 
@@ -763,31 +761,69 @@ xlog_recover_attri_commit_pass2(
 				     attri_formatp, len);
 		return -EFSCORRUPTED;
 	}
+	i++;
 
 	/* Validate the attr name */
-	if (item->ri_buf[1].i_len !=
+	if (item->ri_buf[i].i_len !=
 			xlog_calc_iovec_len(attri_formatp->alfi_name_len)) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-				item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
+				attri_formatp, len);
 		return -EFSCORRUPTED;
 	}
 
+	attr_name = item->ri_buf[i].i_addr;
 	if (!xfs_attr_namecheck(attr_name, attri_formatp->alfi_name_len)) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-				item->ri_buf[1].i_addr, item->ri_buf[1].i_len);
+				attri_formatp, len);
 		return -EFSCORRUPTED;
 	}
+	i++;
 
 	/* Validate the attr value, if present */
 	if (attri_formatp->alfi_value_len != 0) {
-		if (item->ri_buf[2].i_len != xlog_calc_iovec_len(attri_formatp->alfi_value_len)) {
+		if (item->ri_buf[i].i_len != xlog_calc_iovec_len(attri_formatp->alfi_value_len)) {
 			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 					item->ri_buf[0].i_addr,
 					item->ri_buf[0].i_len);
 			return -EFSCORRUPTED;
 		}
 
-		attr_value = item->ri_buf[2].i_addr;
+		attr_value = item->ri_buf[i].i_addr;
+		i++;
+	}
+
+	/*
+	 * Make sure we got the correct number of buffers for the operation
+	 * that we just loaded.
+	 */
+	if (i != item->ri_total) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+				attri_formatp, len);
+		return -EFSCORRUPTED;
+	}
+
+	switch (op) {
+	case XFS_ATTRI_OP_FLAGS_REMOVE:
+		/* Regular remove operations operate only on names. */
+		if (attr_value != NULL || attri_formatp->alfi_value_len != 0) {
+			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+					     attri_formatp, len);
+			return -EFSCORRUPTED;
+		}
+		fallthrough;
+	case XFS_ATTRI_OP_FLAGS_SET:
+	case XFS_ATTRI_OP_FLAGS_REPLACE:
+		/*
+		 * Regular xattr set/remove/replace operations require a name
+		 * and do not take a newname.  Values are optional for set and
+		 * replace.
+		 */
+		if (attr_name == NULL || attri_formatp->alfi_name_len == 0) {
+			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+					     attri_formatp, len);
+			return -EFSCORRUPTED;
+		}
+		break;
 	}
 
 	/*

[PATCH 6.6 032/124] xfs: enforce one namespace per attribute

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit ea0b3e814741fb64e7785b564ea619578058e0b0 upstream.

[backport: fix conflicts due to various xattr refactoring]

Create a standardized helper function to enforce one namespace bit per
extended attribute, and refactor all the open-coded hweight logic.  This
function is not a static inline to avoid porting hassles in userspace.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_attr.c      |   11 +++++++++++
 fs/xfs/libxfs/xfs_attr.h      |    4 +++-
 fs/xfs/libxfs/xfs_attr_leaf.c |    6 +++++-
 fs/xfs/scrub/attr.c           |   12 +++++-------
 fs/xfs/xfs_attr_item.c        |   10 ++++++++--
 fs/xfs/xfs_attr_list.c        |   11 +++++++----
 6 files changed, 39 insertions(+), 15 deletions(-)

--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -1565,12 +1565,23 @@ out_release:
 	return error;
 }
 
+/* Enforce that there is at most one namespace bit per attr. */
+inline bool xfs_attr_check_namespace(unsigned int attr_flags)
+{
+	return hweight32(attr_flags & XFS_ATTR_NSP_ONDISK_MASK) < 2;
+}
+
 /* Returns true if the attribute entry name is valid. */
 bool
 xfs_attr_namecheck(
+	unsigned int	attr_flags,
 	const void	*name,
 	size_t		length)
 {
+	/* Only one namespace bit allowed. */
+	if (!xfs_attr_check_namespace(attr_flags))
+		return false;
+
 	/*
 	 * MAXNAMELEN includes the trailing null, but (name/length) leave it
 	 * out, so use >= for the length check.
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -547,7 +547,9 @@ int xfs_attr_get(struct xfs_da_args *arg
 int xfs_attr_set(struct xfs_da_args *args);
 int xfs_attr_set_iter(struct xfs_attr_intent *attr);
 int xfs_attr_remove_iter(struct xfs_attr_intent *attr);
-bool xfs_attr_namecheck(const void *name, size_t length);
+bool xfs_attr_check_namespace(unsigned int attr_flags);
+bool xfs_attr_namecheck(unsigned int attr_flags, const void *name,
+		size_t length);
 int xfs_attr_calc_size(struct xfs_da_args *args, int *local);
 void xfs_init_attr_trans(struct xfs_da_args *args, struct xfs_trans_res *tres,
 			 unsigned int *total);
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -984,6 +984,10 @@ xfs_attr_shortform_to_leaf(
 		nargs.hashval = xfs_da_hashname(sfe->nameval,
 						sfe->namelen);
 		nargs.attr_filter = sfe->flags & XFS_ATTR_NSP_ONDISK_MASK;
+		if (!xfs_attr_check_namespace(sfe->flags)) {
+			error = -EFSCORRUPTED;
+			goto out;
+		}
 		error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */
 		ASSERT(error == -ENOATTR);
 		error = xfs_attr3_leaf_add(bp, &nargs);
@@ -1105,7 +1109,7 @@ xfs_attr_shortform_verify(
 		 * one namespace flag per xattr, so we can just count the
 		 * bits (i.e. hweight) here.
 		 */
-		if (hweight8(sfep->flags & XFS_ATTR_NSP_ONDISK_MASK) > 1)
+		if (!xfs_attr_check_namespace(sfep->flags))
 			return __this_address;
 
 		sfep = next_sfep;
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -193,14 +193,8 @@ xchk_xattr_listent(
 		return;
 	}
 
-	/* Only one namespace bit allowed. */
-	if (hweight32(flags & XFS_ATTR_NSP_ONDISK_MASK) > 1) {
-		xchk_fblock_set_corrupt(sx->sc, XFS_ATTR_FORK, args.blkno);
-		goto fail_xref;
-	}
-
 	/* Does this name make sense? */
-	if (!xfs_attr_namecheck(name, namelen)) {
+	if (!xfs_attr_namecheck(flags, name, namelen)) {
 		xchk_fblock_set_corrupt(sx->sc, XFS_ATTR_FORK, args.blkno);
 		goto fail_xref;
 	}
@@ -501,6 +495,10 @@ xchk_xattr_rec(
 		xchk_da_set_corrupt(ds, level);
 		return 0;
 	}
+	if (!xfs_attr_check_namespace(ent->flags)) {
+		xchk_da_set_corrupt(ds, level);
+		return 0;
+	}
 
 	if (ent->flags & XFS_ATTR_LOCAL) {
 		lentry = (struct xfs_attr_leaf_name_local *)
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -522,6 +522,10 @@ xfs_attri_validate(
 	if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK)
 		return false;
 
+	if (!xfs_attr_check_namespace(attrp->alfi_attr_filter &
+				      XFS_ATTR_NSP_ONDISK_MASK))
+		return false;
+
 	/* alfi_op_flags should be either a set or remove */
 	switch (op) {
 	case XFS_ATTRI_OP_FLAGS_SET:
@@ -572,7 +576,8 @@ xfs_attri_item_recover(
 	 */
 	attrp = &attrip->attri_format;
 	if (!xfs_attri_validate(mp, attrp) ||
-	    !xfs_attr_namecheck(nv->name.i_addr, nv->name.i_len))
+	    !xfs_attr_namecheck(attrp->alfi_attr_filter, nv->name.i_addr,
+				nv->name.i_len))
 		return -EFSCORRUPTED;
 
 	error = xlog_recover_iget(mp,  attrp->alfi_ino, &ip);
@@ -772,7 +777,8 @@ xlog_recover_attri_commit_pass2(
 	}
 
 	attr_name = item->ri_buf[i].i_addr;
-	if (!xfs_attr_namecheck(attr_name, attri_formatp->alfi_name_len)) {
+	if (!xfs_attr_namecheck(attri_formatp->alfi_attr_filter, attr_name,
+				attri_formatp->alfi_name_len)) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 				attri_formatp, len);
 		return -EFSCORRUPTED;
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -82,7 +82,8 @@ xfs_attr_shortform_list(
 	     (dp->i_af.if_bytes + sf->hdr.count * 16) < context->bufsize)) {
 		for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
 			if (XFS_IS_CORRUPT(context->dp->i_mount,
-					   !xfs_attr_namecheck(sfe->nameval,
+					   !xfs_attr_namecheck(sfe->flags,
+							       sfe->nameval,
 							       sfe->namelen)))
 				return -EFSCORRUPTED;
 			context->put_listent(context,
@@ -120,7 +121,8 @@ xfs_attr_shortform_list(
 	for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
 		if (unlikely(
 		    ((char *)sfe < (char *)sf) ||
-		    ((char *)sfe >= ((char *)sf + dp->i_af.if_bytes)))) {
+		    ((char *)sfe >= ((char *)sf + dp->i_af.if_bytes)) ||
+		    !xfs_attr_check_namespace(sfe->flags))) {
 			XFS_CORRUPTION_ERROR("xfs_attr_shortform_list",
 					     XFS_ERRLEVEL_LOW,
 					     context->dp->i_mount, sfe,
@@ -174,7 +176,7 @@ xfs_attr_shortform_list(
 			cursor->offset = 0;
 		}
 		if (XFS_IS_CORRUPT(context->dp->i_mount,
-				   !xfs_attr_namecheck(sbp->name,
+				   !xfs_attr_namecheck(sbp->flags, sbp->name,
 						       sbp->namelen))) {
 			error = -EFSCORRUPTED;
 			goto out;
@@ -465,7 +467,8 @@ xfs_attr3_leaf_list_int(
 		}
 
 		if (XFS_IS_CORRUPT(context->dp->i_mount,
-				   !xfs_attr_namecheck(name, namelen)))
+				   !xfs_attr_namecheck(entry->flags, name,
+						       namelen)))
 			return -EFSCORRUPTED;
 		context->put_listent(context, entry->flags,
 					      name, namelen, valuelen);

[PATCH 6.6 033/124] xfs: revert commit 44af6c7e59b12

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 2a009397eb5ae178670cbd7101e9635cf6412b35 upstream.

[backport: resolve conflicts due to new xattr walk helper]

In my haste to fix what I thought was a performance problem in the attr
scrub code, I neglected to notice that the xfs_attr_get_ilocked also had
the effect of checking that attributes can actually be looked up through
the attr dabtree.  Fix this.

Fixes: 44af6c7e59b12 ("xfs: don't load local xattr values during scrub")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/scrub/attr.c |   13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -200,14 +200,6 @@ xchk_xattr_listent(
 	}
 
 	/*
-	 * Local xattr values are stored in the attr leaf block, so we don't
-	 * need to retrieve the value from a remote block to detect corruption
-	 * problems.
-	 */
-	if (flags & XFS_ATTR_LOCAL)
-		goto fail_xref;
-
-	/*
 	 * Try to allocate enough memory to extrat the attr value.  If that
 	 * doesn't work, we overload the seen_enough variable to convey
 	 * the error message back to the main scrub function.
@@ -222,6 +214,11 @@ xchk_xattr_listent(
 
 	args.value = ab->value;
 
+	/*
+	 * Get the attr value to ensure that lookup can find this attribute
+	 * through the dabtree indexing and that remote value retrieval also
+	 * works correctly.
+	 */
 	error = xfs_attr_get_ilocked(&args);
 	/* ENODATA means the hash lookup failed and the attr is bad */
 	if (error == -ENODATA)

[PATCH 6.6 034/124] xfs: use dontcache for grabbing inodes during scrub

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit b27ce0da60a523fc32e3795f96b2de5490642235 upstream.

[backport: resolve conflict due to missing iscan.c]

Back when I wrote commit a03297a0ca9f2, I had thought that we'd be doing
users a favor by only marking inodes dontcache at the end of a scrub
operation, and only if there's only one reference to that inode.  This
was more or less true back when I_DONTCACHE was an XFS iflag and the
only thing it did was change the outcome of xfs_fs_drop_inode to 1.

Note: If there are dentries pointing to the inode when scrub finishes,
the inode will have positive i_count and stay around in cache until
dentry reclaim.

But now we have d_mark_dontcache, which cause the inode *and* the
dentries attached to it all to be marked I_DONTCACHE, which means that
we drop the dentries ASAP, which drops the inode ASAP.

This is bad if scrub found problems with the inode, because now they can
be scheduled for inactivation, which can cause inodegc to trip on it and
shut down the filesystem.

Even if the inode isn't bad, this is still suboptimal because phases 3-7
each initiate inode scans.  Dropping the inode immediately during phase
3 is silly because phase 5 will reload it and drop it immediately, etc.
It's fine to mark the inodes dontcache, but if there have been accesses
to the file that set up dentries, we should keep them.

I validated this by setting up ftrace to capture xfs_iget_recycle*
tracepoints and ran xfs/285 for 30 seconds.  With current djwong-wtf I
saw ~30,000 recycle events.  I then dropped the d_mark_dontcache calls
and set XFS_IGET_DONTCACHE, and the recycle events dropped to ~5,000 per
30 seconds.

Therefore, grab the inode with XFS_IGET_DONTCACHE, which only has the
effect of setting I_DONTCACHE for cache misses.  Remove the
d_mark_dontcache call that can happen in xchk_irele.

Fixes: a03297a0ca9f2 ("xfs: manage inode DONTCACHE status at irele time")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/scrub/common.c |   12 +++---------
 fs/xfs/scrub/scrub.h  |    7 +++++++
 2 files changed, 10 insertions(+), 9 deletions(-)

--- a/fs/xfs/scrub/common.c
+++ b/fs/xfs/scrub/common.c
@@ -735,7 +735,7 @@ xchk_iget(
 {
 	ASSERT(sc->tp != NULL);
 
-	return xfs_iget(sc->mp, sc->tp, inum, XFS_IGET_UNTRUSTED, 0, ipp);
+	return xfs_iget(sc->mp, sc->tp, inum, XCHK_IGET_FLAGS, 0, ipp);
 }
 
 /*
@@ -786,8 +786,8 @@ again:
 	if (error)
 		return error;
 
-	error = xfs_iget(mp, tp, inum,
-			XFS_IGET_NORETRY | XFS_IGET_UNTRUSTED, 0, ipp);
+	error = xfs_iget(mp, tp, inum, XFS_IGET_NORETRY | XCHK_IGET_FLAGS, 0,
+			ipp);
 	if (error == -EAGAIN) {
 		/*
 		 * The inode may be in core but temporarily unavailable and may
@@ -994,12 +994,6 @@ xchk_irele(
 		spin_lock(&VFS_I(ip)->i_lock);
 		VFS_I(ip)->i_state &= ~I_DONTCACHE;
 		spin_unlock(&VFS_I(ip)->i_lock);
-	} else if (atomic_read(&VFS_I(ip)->i_count) == 1) {
-		/*
-		 * If this is the last reference to the inode and the caller
-		 * permits it, set DONTCACHE to avoid thrashing.
-		 */
-		d_mark_dontcache(VFS_I(ip));
 	}
 
 	xfs_irele(ip);
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -17,6 +17,13 @@ struct xfs_scrub;
 #define XCHK_GFP_FLAGS	((__force gfp_t)(GFP_KERNEL | __GFP_NOWARN | \
 					 __GFP_RETRY_MAYFAIL))
 
+/*
+ * For opening files by handle for fsck operations, we don't trust the inumber
+ * or the allocation state; therefore, perform an untrusted lookup.  We don't
+ * want these inodes to pollute the cache, so mark them for immediate removal.
+ */
+#define XCHK_IGET_FLAGS	(XFS_IGET_UNTRUSTED | XFS_IGET_DONTCACHE)
+
 /* Type info and names for the scrub types. */
 enum xchk_type {
 	ST_NONE = 1,	/* disabled */

[PATCH 6.6 035/124] xfs: match lock mode in xfs_buffered_write_iomap_begin()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Yi <yi.zhang@huawei.com>

commit bb712842a85d595525e72f0e378c143e620b3ea2 upstream.

Commit 1aa91d9c9933 ("xfs: Add async buffered write support") replace
xfs_ilock(XFS_ILOCK_EXCL) with xfs_ilock_for_iomap() when locking the
writing inode, and a new variable lockmode is used to indicate the lock
mode. Although the lockmode should always be XFS_ILOCK_EXCL, it's still
better to use this variable instead of useing XFS_ILOCK_EXCL directly
when unlocking the inode.

Fixes: 1aa91d9c9933 ("xfs: Add async buffered write support")
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_iomap.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1141,13 +1141,13 @@ retry:
 	 * them out if the write happens to fail.
 	 */
 	seq = xfs_iomap_inode_sequence(ip, IOMAP_F_NEW);
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(ip, lockmode);
 	trace_xfs_iomap_alloc(ip, offset, count, allocfork, &imap);
 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, IOMAP_F_NEW, seq);
 
 found_imap:
 	seq = xfs_iomap_inode_sequence(ip, 0);
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(ip, lockmode);
 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, 0, seq);
 
 found_cow:
@@ -1157,17 +1157,17 @@ found_cow:
 		if (error)
 			goto out_unlock;
 		seq = xfs_iomap_inode_sequence(ip, IOMAP_F_SHARED);
-		xfs_iunlock(ip, XFS_ILOCK_EXCL);
+		xfs_iunlock(ip, lockmode);
 		return xfs_bmbt_to_iomap(ip, iomap, &cmap, flags,
 					 IOMAP_F_SHARED, seq);
 	}
 
 	xfs_trim_extent(&cmap, offset_fsb, imap.br_startoff - offset_fsb);
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(ip, lockmode);
 	return xfs_bmbt_to_iomap(ip, iomap, &cmap, flags, 0, seq);
 
 out_unlock:
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(ip, lockmode);
 	return error;
 }
 

[PATCH 6.6 036/124] xfs: make the seq argument to xfs_bmapi_convert_delalloc() optional

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Yi <yi.zhang@huawei.com>

commit fc8d0ba0ff5fe4700fa02008b7751ec6b84b7677 upstream.

Allow callers to pass a NULLL seq argument if they don't care about
the fork sequence number.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_bmap.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4595,7 +4595,8 @@ xfs_bmapi_convert_delalloc(
 	if (!isnullstartblock(bma.got.br_startblock)) {
 		xfs_bmbt_to_iomap(ip, iomap, &bma.got, 0, flags,
 				xfs_iomap_inode_sequence(ip, flags));
-		*seq = READ_ONCE(ifp->if_seq);
+		if (seq)
+			*seq = READ_ONCE(ifp->if_seq);
 		goto out_trans_cancel;
 	}
 
@@ -4641,7 +4642,8 @@ xfs_bmapi_convert_delalloc(
 	ASSERT(!isnullstartblock(bma.got.br_startblock));
 	xfs_bmbt_to_iomap(ip, iomap, &bma.got, 0, flags,
 				xfs_iomap_inode_sequence(ip, flags));
-	*seq = READ_ONCE(ifp->if_seq);
+	if (seq)
+		*seq = READ_ONCE(ifp->if_seq);
 
 	if (whichfork == XFS_COW_FORK)
 		xfs_refcount_alloc_cow_extent(tp, bma.blkno, bma.length);

[PATCH 6.6 037/124] xfs: make xfs_bmapi_convert_delalloc() to allocate the target offset

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Yi <yi.zhang@huawei.com>

commit 2e08371a83f1c06fd85eea8cd37c87a224cc4cc4 upstream.

Since xfs_bmapi_convert_delalloc() only attempts to allocate the entire
delalloc extent and require multiple invocations to allocate the target
offset. So xfs_convert_blocks() add a loop to do this job and we call it
in the write back path, but xfs_convert_blocks() isn't a common helper.
Let's do it in xfs_bmapi_convert_delalloc() and drop
xfs_convert_blocks(), preparing for the post EOF delalloc blocks
converting in the buffered write begin path.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_bmap.c |   34 +++++++++++++++++++++++++++--
 fs/xfs/xfs_aops.c        |   54 ++++++++++++-----------------------------------
 2 files changed, 46 insertions(+), 42 deletions(-)

--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4537,8 +4537,8 @@ error0:
  * invocations to allocate the target offset if a large enough physical extent
  * is not available.
  */
-int
-xfs_bmapi_convert_delalloc(
+static int
+xfs_bmapi_convert_one_delalloc(
 	struct xfs_inode	*ip,
 	int			whichfork,
 	xfs_off_t		offset,
@@ -4666,6 +4666,36 @@ out_trans_cancel:
 	return error;
 }
 
+/*
+ * Pass in a dellalloc extent and convert it to real extents, return the real
+ * extent that maps offset_fsb in iomap.
+ */
+int
+xfs_bmapi_convert_delalloc(
+	struct xfs_inode	*ip,
+	int			whichfork,
+	loff_t			offset,
+	struct iomap		*iomap,
+	unsigned int		*seq)
+{
+	int			error;
+
+	/*
+	 * Attempt to allocate whatever delalloc extent currently backs offset
+	 * and put the result into iomap.  Allocate in a loop because it may
+	 * take several attempts to allocate real blocks for a contiguous
+	 * delalloc extent if free space is sufficiently fragmented.
+	 */
+	do {
+		error = xfs_bmapi_convert_one_delalloc(ip, whichfork, offset,
+					iomap, seq);
+		if (error)
+			return error;
+	} while (iomap->offset + iomap->length <= offset);
+
+	return 0;
+}
+
 int
 xfs_bmapi_remap(
 	struct xfs_trans	*tp,
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -233,45 +233,6 @@ xfs_imap_valid(
 	return true;
 }
 
-/*
- * Pass in a dellalloc extent and convert it to real extents, return the real
- * extent that maps offset_fsb in wpc->iomap.
- *
- * The current page is held locked so nothing could have removed the block
- * backing offset_fsb, although it could have moved from the COW to the data
- * fork by another thread.
- */
-static int
-xfs_convert_blocks(
-	struct iomap_writepage_ctx *wpc,
-	struct xfs_inode	*ip,
-	int			whichfork,
-	loff_t			offset)
-{
-	int			error;
-	unsigned		*seq;
-
-	if (whichfork == XFS_COW_FORK)
-		seq = &XFS_WPC(wpc)->cow_seq;
-	else
-		seq = &XFS_WPC(wpc)->data_seq;
-
-	/*
-	 * Attempt to allocate whatever delalloc extent currently backs offset
-	 * and put the result into wpc->iomap.  Allocate in a loop because it
-	 * may take several attempts to allocate real blocks for a contiguous
-	 * delalloc extent if free space is sufficiently fragmented.
-	 */
-	do {
-		error = xfs_bmapi_convert_delalloc(ip, whichfork, offset,
-				&wpc->iomap, seq);
-		if (error)
-			return error;
-	} while (wpc->iomap.offset + wpc->iomap.length <= offset);
-
-	return 0;
-}
-
 static int
 xfs_map_blocks(
 	struct iomap_writepage_ctx *wpc,
@@ -289,6 +250,7 @@ xfs_map_blocks(
 	struct xfs_iext_cursor	icur;
 	int			retries = 0;
 	int			error = 0;
+	unsigned int		*seq;
 
 	if (xfs_is_shutdown(mp))
 		return -EIO;
@@ -386,7 +348,19 @@ retry:
 	trace_xfs_map_blocks_found(ip, offset, count, whichfork, &imap);
 	return 0;
 allocate_blocks:
-	error = xfs_convert_blocks(wpc, ip, whichfork, offset);
+	/*
+	 * Convert a dellalloc extent to a real one. The current page is held
+	 * locked so nothing could have removed the block backing offset_fsb,
+	 * although it could have moved from the COW to the data fork by another
+	 * thread.
+	 */
+	if (whichfork == XFS_COW_FORK)
+		seq = &XFS_WPC(wpc)->cow_seq;
+	else
+		seq = &XFS_WPC(wpc)->data_seq;
+
+	error = xfs_bmapi_convert_delalloc(ip, whichfork, offset,
+				&wpc->iomap, seq);
 	if (error) {
 		/*
 		 * If we failed to find the extent in the COW fork we might have

[PATCH 6.6 038/124] xfs: convert delayed extents to unwritten when zeroing post eof blocks

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Yi <yi.zhang@huawei.com>

commit 5ce5674187c345dc31534d2024c09ad8ef29b7ba upstream.

Current clone operation could be non-atomic if the destination of a file
is beyond EOF, user could get a file with corrupted (zeroed) data on
crash.

The problem is about preallocations. If you write some data into a file:

	[A...B)

and XFS decides to preallocate some post-eof blocks, then it can create
a delayed allocation reservation:

	[A.........D)

The writeback path tries to convert delayed extents to real ones by
allocating blocks. If there aren't enough contiguous free space, we can
end up with two extents, the first real and the second still delalloc:

	[A....C)[C.D)

After that, both the in-memory and the on-disk file sizes are still B.
If we clone into the range [E...F) from another file:

	[A....C)[C.D)      [E...F)

then xfs_reflink_zero_posteof() calls iomap_zero_range() to zero out the
range [B, E) beyond EOF and flush it. Since [C, D) is still a delalloc
extent, its pagecache will be zeroed and both the in-memory and on-disk
size will be updated to D after flushing but before cloning. This is
wrong, because the user can see the size change and read the zeroes
while the clone operation is ongoing.

We need to keep the in-memory and on-disk size before the clone
operation starts, so instead of writing zeroes through the page cache
for delayed ranges beyond EOF, we convert these ranges to unwritten and
invalidate any cached data over that range beyond EOF.

Suggested-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_iomap.c |   29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1006,6 +1006,24 @@ xfs_buffered_write_iomap_begin(
 	}
 
 	/*
+	 * For zeroing, trim a delalloc extent that extends beyond the EOF
+	 * block.  If it starts beyond the EOF block, convert it to an
+	 * unwritten extent.
+	 */
+	if ((flags & IOMAP_ZERO) && imap.br_startoff <= offset_fsb &&
+	    isnullstartblock(imap.br_startblock)) {
+		xfs_fileoff_t eof_fsb = XFS_B_TO_FSB(mp, XFS_ISIZE(ip));
+
+		if (offset_fsb >= eof_fsb)
+			goto convert_delay;
+		if (end_fsb > eof_fsb) {
+			end_fsb = eof_fsb;
+			xfs_trim_extent(&imap, offset_fsb,
+					end_fsb - offset_fsb);
+		}
+	}
+
+	/*
 	 * Search the COW fork extent list even if we did not find a data fork
 	 * extent.  This serves two purposes: first this implements the
 	 * speculative preallocation using cowextsize, so that we also unshare
@@ -1150,6 +1168,17 @@ found_imap:
 	xfs_iunlock(ip, lockmode);
 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, 0, seq);
 
+convert_delay:
+	xfs_iunlock(ip, lockmode);
+	truncate_pagecache(inode, offset);
+	error = xfs_bmapi_convert_delalloc(ip, XFS_DATA_FORK, offset,
+					   iomap, NULL);
+	if (error)
+		return error;
+
+	trace_xfs_iomap_alloc(ip, offset, count, XFS_DATA_FORK, &imap);
+	return 0;
+
 found_cow:
 	seq = xfs_iomap_inode_sequence(ip, 0);
 	if (imap.br_startoff <= offset_fsb) {

[PATCH 6.6 039/124] xfs: allow symlinks with short remote targets

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 38de567906d95c397d87f292b892686b7ec6fbc3 upstream.

An internal user complained about log recovery failing on a symlink
("Bad dinode after recovery") with the following (excerpted) format:

core.magic = 0x494e
core.mode = 0120777
core.version = 3
core.format = 2 (extents)
core.nlinkv2 = 1
core.nextents = 1
core.size = 297
core.nblocks = 1
core.naextents = 0
core.forkoff = 0
core.aformat = 2 (extents)
u3.bmx[0] = [startoff,startblock,blockcount,extentflag]
0:[0,12,1,0]

This is a symbolic link with a 297-byte target stored in a disk block,
which is to say this is a symlink with a remote target.  The forkoff is
0, which is to say that there's 512 - 176 == 336 bytes in the inode core
to store the data fork.

Eventually, testing of generic/388 failed with the same inode corruption
message during inode recovery.  In writing a debugging patch to call
xfs_dinode_verify on dirty inode log items when we're committing
transactions, I observed that xfs/298 can reproduce the problem quite
quickly.

xfs/298 creates a symbolic link, adds some extended attributes, then
deletes them all.  The test failure occurs when the final removexattr
also deletes the attr fork because that does not convert the remote
symlink back into a shortform symlink.  That is how we trip this test.
The only reason why xfs/298 only triggers with the debug patch added is
that it deletes the symlink, so the final iflush shows the inode as
free.

I wrote a quick fstest to emulate the behavior of xfs/298, except that
it leaves the symlinks on the filesystem after inducing the "corrupt"
state.  Kernels going back at least as far as 4.18 have written out
symlink inodes in this manner and prior to 1eb70f54c445f they did not
object to reading them back in.

Because we've been writing out inodes this way for quite some time, the
only way to fix this is to relax the check for symbolic links.
Directories don't have this problem because di_size is bumped to
blocksize during the sf->data conversion.

Fixes: 1eb70f54c445f ("xfs: validate inode fork size against fork format")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_inode_buf.c |   28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -366,17 +366,37 @@ xfs_dinode_verify_fork(
 	/*
 	 * For fork types that can contain local data, check that the fork
 	 * format matches the size of local data contained within the fork.
-	 *
-	 * For all types, check that when the size says the should be in extent
-	 * or btree format, the inode isn't claiming it is in local format.
 	 */
 	if (whichfork == XFS_DATA_FORK) {
-		if (S_ISDIR(mode) || S_ISLNK(mode)) {
+		/*
+		 * A directory small enough to fit in the inode must be stored
+		 * in local format.  The directory sf <-> extents conversion
+		 * code updates the directory size accordingly.
+		 */
+		if (S_ISDIR(mode)) {
 			if (be64_to_cpu(dip->di_size) <= fork_size &&
 			    fork_format != XFS_DINODE_FMT_LOCAL)
 				return __this_address;
 		}
 
+		/*
+		 * A symlink with a target small enough to fit in the inode can
+		 * be stored in extents format if xattrs were added (thus
+		 * converting the data fork from shortform to remote format)
+		 * and then removed.
+		 */
+		if (S_ISLNK(mode)) {
+			if (be64_to_cpu(dip->di_size) <= fork_size &&
+			    fork_format != XFS_DINODE_FMT_EXTENTS &&
+			    fork_format != XFS_DINODE_FMT_LOCAL)
+				return __this_address;
+		}
+
+		/*
+		 * For all types, check that when the size says the fork should
+		 * be in extent or btree format, the inode isn't claiming to be
+		 * in local format.
+		 */
 		if (be64_to_cpu(dip->di_size) > fork_size &&
 		    fork_format == XFS_DINODE_FMT_LOCAL)
 			return __this_address;

[PATCH 6.6 040/124] xfs: make sure sb_fdblocks is non-negative

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wengang Wang <wen.gang.wang@oracle.com>

commit 58f880711f2ba53fd5e959875aff5b3bf6d5c32e upstream.

A user with a completely full filesystem experienced an unexpected
shutdown when the filesystem tried to write the superblock during
runtime.
kernel shows the following dmesg:

[    8.176281] XFS (dm-4): Metadata corruption detected at xfs_sb_write_verify+0x60/0x120 [xfs], xfs_sb block 0x0
[    8.177417] XFS (dm-4): Unmount and run xfs_repair
[    8.178016] XFS (dm-4): First 128 bytes of corrupted metadata buffer:
[    8.178703] 00000000: 58 46 53 42 00 00 10 00 00 00 00 00 01 90 00 00  XFSB............
[    8.179487] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    8.180312] 00000020: cf 12 dc 89 ca 26 45 29 92 e6 e3 8d 3b b8 a2 c3  .....&E)....;...
[    8.181150] 00000030: 00 00 00 00 01 00 00 06 00 00 00 00 00 00 00 80  ................
[    8.182003] 00000040: 00 00 00 00 00 00 00 81 00 00 00 00 00 00 00 82  ................
[    8.182004] 00000050: 00 00 00 01 00 64 00 00 00 00 00 04 00 00 00 00  .....d..........
[    8.182004] 00000060: 00 00 64 00 b4 a5 02 00 02 00 00 08 00 00 00 00  ..d.............
[    8.182005] 00000070: 00 00 00 00 00 00 00 00 0c 09 09 03 17 00 00 19  ................
[    8.182008] XFS (dm-4): Corruption of in-memory data detected.  Shutting down filesystem
[    8.182010] XFS (dm-4): Please unmount the filesystem and rectify the problem(s)

When xfs_log_sb writes super block to disk, b_fdblocks is fetched from
m_fdblocks without any lock. As m_fdblocks can experience a positive ->
negative -> positive changing when the FS reaches fullness (see
xfs_mod_fdblocks). So there is a chance that sb_fdblocks is negative, and
because sb_fdblocks is type of unsigned long long, it reads super big.
And sb_fdblocks being bigger than sb_dblocks is a problem during log
recovery, xfs_validate_sb_write() complains.

Fix:
As sb_fdblocks will be re-calculated during mount when lazysbcount is
enabled, We just need to make xfs_validate_sb_write() happy -- make sure
sb_fdblocks is not nenative. This patch also takes care of other percpu
counters in xfs_log_sb.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_sb.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -1031,11 +1031,12 @@ xfs_log_sb(
 	 * and hence we don't need have to update it here.
 	 */
 	if (xfs_has_lazysbcount(mp)) {
-		mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
+		mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount);
 		mp->m_sb.sb_ifree = min_t(uint64_t,
-				percpu_counter_sum(&mp->m_ifree),
+				percpu_counter_sum_positive(&mp->m_ifree),
 				mp->m_sb.sb_icount);
-		mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
+		mp->m_sb.sb_fdblocks =
+				percpu_counter_sum_positive(&mp->m_fdblocks);
 	}
 
 	xfs_sb_to_disk(bp->b_addr, &mp->m_sb);

[PATCH 6.6 041/124] xfs: fix unlink vs cluster buffer instantiation race

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Chinner <dchinner@redhat.com>

commit 348a1983cf4cf5099fc398438a968443af4c9f65 upstream.

Luis has been reporting an assert failure when freeing an inode
cluster during inode inactivation for a while. The assert looks
like:

 XFS: Assertion failed: bp->b_flags & XBF_DONE, file: fs/xfs/xfs_trans_buf.c, line: 241
 ------------[ cut here ]------------
 kernel BUG at fs/xfs/xfs_message.c:102!
 Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
 CPU: 4 PID: 73 Comm: kworker/4:1 Not tainted 6.10.0-rc1 #4
 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
 Workqueue: xfs-inodegc/loop5 xfs_inodegc_worker [xfs]
 RIP: 0010:assfail (fs/xfs/xfs_message.c:102) xfs
 RSP: 0018:ffff88810188f7f0 EFLAGS: 00010202
 RAX: 0000000000000000 RBX: ffff88816e748250 RCX: 1ffffffff844b0e7
 RDX: 0000000000000004 RSI: ffff88810188f558 RDI: ffffffffc2431fa0
 RBP: 1ffff11020311f01 R08: 0000000042431f9f R09: ffffed1020311e9b
 R10: ffff88810188f4df R11: ffffffffac725d70 R12: ffff88817a3f4000
 R13: ffff88812182f000 R14: ffff88810188f998 R15: ffffffffc2423f80
 FS:  0000000000000000(0000) GS:ffff8881c8400000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 000055fe9d0f109c CR3: 000000014426c002 CR4: 0000000000770ef0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
 PKRU: 55555554
 Call Trace:
  <TASK>
 xfs_trans_read_buf_map (fs/xfs/xfs_trans_buf.c:241 (discriminator 1)) xfs
 xfs_imap_to_bp (fs/xfs/xfs_trans.h:210 fs/xfs/libxfs/xfs_inode_buf.c:138) xfs
 xfs_inode_item_precommit (fs/xfs/xfs_inode_item.c:145) xfs
 xfs_trans_run_precommits (fs/xfs/xfs_trans.c:931) xfs
 __xfs_trans_commit (fs/xfs/xfs_trans.c:966) xfs
 xfs_inactive_ifree (fs/xfs/xfs_inode.c:1811) xfs
 xfs_inactive (fs/xfs/xfs_inode.c:2013) xfs
 xfs_inodegc_worker (fs/xfs/xfs_icache.c:1841 fs/xfs/xfs_icache.c:1886) xfs
 process_one_work (kernel/workqueue.c:3231)
 worker_thread (kernel/workqueue.c:3306 (discriminator 2) kernel/workqueue.c:3393 (discriminator 2))
 kthread (kernel/kthread.c:389)
 ret_from_fork (arch/x86/kernel/process.c:147)
 ret_from_fork_asm (arch/x86/entry/entry_64.S:257)
  </TASK>

And occurs when the the inode precommit handlers is attempt to look
up the inode cluster buffer to attach the inode for writeback.

The trail of logic that I can reconstruct is as follows.

	1. the inode is clean when inodegc runs, so it is not
	   attached to a cluster buffer when precommit runs.

	2. #1 implies the inode cluster buffer may be clean and not
	   pinned by dirty inodes when inodegc runs.

	3. #2 implies that the inode cluster buffer can be reclaimed
	   by memory pressure at any time.

	4. The assert failure implies that the cluster buffer was
	   attached to the transaction, but not marked done. It had
	   been accessed earlier in the transaction, but not marked
	   done.

	5. #4 implies the cluster buffer has been invalidated (i.e.
	   marked stale).

	6. #5 implies that the inode cluster buffer was instantiated
	   uninitialised in the transaction in xfs_ifree_cluster(),
	   which only instantiates the buffers to invalidate them
	   and never marks them as done.

Given factors 1-3, this issue is highly dependent on timing and
environmental factors. Hence the issue can be very difficult to
reproduce in some situations, but highly reliable in others. Luis
has an environment where it can be reproduced easily by g/531 but,
OTOH, I've reproduced it only once in ~2000 cycles of g/531.

I think the fix is to have xfs_ifree_cluster() set the XBF_DONE flag
on the cluster buffers, even though they may not be initialised. The
reasons why I think this is safe are:

	1. A buffer cache lookup hit on a XBF_STALE buffer will
	   clear the XBF_DONE flag. Hence all future users of the
	   buffer know they have to re-initialise the contents
	   before use and mark it done themselves.

	2. xfs_trans_binval() sets the XFS_BLI_STALE flag, which
	   means the buffer remains locked until the journal commit
	   completes and the buffer is unpinned. Hence once marked
	   XBF_STALE/XFS_BLI_STALE by xfs_ifree_cluster(), the only
	   context that can access the freed buffer is the currently
	   running transaction.

	3. #2 implies that future buffer lookups in the currently
	   running transaction will hit the transaction match code
	   and not the buffer cache. Hence XBF_STALE and
	   XFS_BLI_STALE will not be cleared unless the transaction
	   initialises and logs the buffer with valid contents
	   again. At which point, the buffer will be marked marked
	   XBF_DONE again, so having XBF_DONE already set on the
	   stale buffer is a moot point.

	4. #2 also implies that any concurrent access to that
	   cluster buffer will block waiting on the buffer lock
	   until the inode cluster has been fully freed and is no
	   longer an active inode cluster buffer.

	5. #4 + #1 means that any future user of the disk range of
	   that buffer will always see the range of disk blocks
	   covered by the cluster buffer as not done, and hence must
	   initialise the contents themselves.

	6. Setting XBF_DONE in xfs_ifree_cluster() then means the
	   unlinked inode precommit code will see a XBF_DONE buffer
	   from the transaction match as it expects. It can then
	   attach the stale but newly dirtied inode to the stale
	   but newly dirtied cluster buffer without unexpected
	   failures. The stale buffer will then sail through the
	   journal and do the right thing with the attached stale
	   inode during unpin.

Hence the fix is just one line of extra code. The explanation of
why we have to set XBF_DONE in xfs_ifree_cluster, OTOH, is long and
complex....

Fixes: 82842fee6e59 ("xfs: fix AGF vs inode cluster buffer deadlock")
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_inode.c |   23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2329,11 +2329,26 @@ xfs_ifree_cluster(
 		 * This buffer may not have been correctly initialised as we
 		 * didn't read it from disk. That's not important because we are
 		 * only using to mark the buffer as stale in the log, and to
-		 * attach stale cached inodes on it. That means it will never be
-		 * dispatched for IO. If it is, we want to know about it, and we
-		 * want it to fail. We can acheive this by adding a write
-		 * verifier to the buffer.
+		 * attach stale cached inodes on it.
+		 *
+		 * For the inode that triggered the cluster freeing, this
+		 * attachment may occur in xfs_inode_item_precommit() after we
+		 * have marked this buffer stale.  If this buffer was not in
+		 * memory before xfs_ifree_cluster() started, it will not be
+		 * marked XBF_DONE and this will cause problems later in
+		 * xfs_inode_item_precommit() when we trip over a (stale, !done)
+		 * buffer to attached to the transaction.
+		 *
+		 * Hence we have to mark the buffer as XFS_DONE here. This is
+		 * safe because we are also marking the buffer as XBF_STALE and
+		 * XFS_BLI_STALE. That means it will never be dispatched for
+		 * IO and it won't be unlocked until the cluster freeing has
+		 * been committed to the journal and the buffer unpinned. If it
+		 * is written, we want to know about it, and we want it to
+		 * fail. We can acheive this by adding a write verifier to the
+		 * buffer.
 		 */
+		bp->b_flags |= XBF_DONE;
 		bp->b_ops = &xfs_inode_buf_ops;
 
 		/*

[PATCH 6.6 042/124] xfs: fix freeing speculative preallocations for preallocated files

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christoph Hellwig <hch@lst.de>

commit 610b29161b0aa9feb59b78dc867553274f17fb01 upstream.

xfs_can_free_eofblocks returns false for files that have persistent
preallocations unless the force flag is passed and there are delayed
blocks.  This means it won't free delalloc reservations for files
with persistent preallocations unless the force flag is set, and it
will also free the persistent preallocations if the force flag is
set and the file happens to have delayed allocations.

Both of these are bad, so do away with the force flag and always free
only post-EOF delayed allocations for files with the XFS_DIFLAG_PREALLOC
or APPEND flags set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_bmap_util.c |   30 ++++++++++++++++++++++--------
 fs/xfs/xfs_bmap_util.h |    2 +-
 fs/xfs/xfs_icache.c    |    2 +-
 fs/xfs/xfs_inode.c     |   14 ++++----------
 4 files changed, 28 insertions(+), 20 deletions(-)

--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -636,13 +636,11 @@ out_unlock:
 
 /*
  * Test whether it is appropriate to check an inode for and free post EOF
- * blocks. The 'force' parameter determines whether we should also consider
- * regular files that are marked preallocated or append-only.
+ * blocks.
  */
 bool
 xfs_can_free_eofblocks(
-	struct xfs_inode	*ip,
-	bool			force)
+	struct xfs_inode	*ip)
 {
 	struct xfs_bmbt_irec	imap;
 	struct xfs_mount	*mp = ip->i_mount;
@@ -676,11 +674,11 @@ xfs_can_free_eofblocks(
 		return false;
 
 	/*
-	 * Do not free real preallocated or append-only files unless the file
-	 * has delalloc blocks and we are forced to remove them.
+	 * Only free real extents for inodes with persistent preallocations or
+	 * the append-only flag.
 	 */
 	if (ip->i_diflags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND))
-		if (!force || ip->i_delayed_blks == 0)
+		if (ip->i_delayed_blks == 0)
 			return false;
 
 	/*
@@ -734,6 +732,22 @@ xfs_free_eofblocks(
 	/* Wait on dio to ensure i_size has settled. */
 	inode_dio_wait(VFS_I(ip));
 
+	/*
+	 * For preallocated files only free delayed allocations.
+	 *
+	 * Note that this means we also leave speculative preallocations in
+	 * place for preallocated files.
+	 */
+	if (ip->i_diflags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) {
+		if (ip->i_delayed_blks) {
+			xfs_bmap_punch_delalloc_range(ip,
+				round_up(XFS_ISIZE(ip), mp->m_sb.sb_blocksize),
+				LLONG_MAX);
+		}
+		xfs_inode_clear_eofblocks_tag(ip);
+		return 0;
+	}
+
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
 	if (error) {
 		ASSERT(xfs_is_shutdown(mp));
@@ -1048,7 +1062,7 @@ xfs_prepare_shift(
 	 * Trim eofblocks to avoid shifting uninitialized post-eof preallocation
 	 * into the accessible region of the file.
 	 */
-	if (xfs_can_free_eofblocks(ip, true)) {
+	if (xfs_can_free_eofblocks(ip)) {
 		error = xfs_free_eofblocks(ip);
 		if (error)
 			return error;
--- a/fs/xfs/xfs_bmap_util.h
+++ b/fs/xfs/xfs_bmap_util.h
@@ -63,7 +63,7 @@ int	xfs_insert_file_space(struct xfs_ino
 				xfs_off_t len);
 
 /* EOF block manipulation functions */
-bool	xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
+bool	xfs_can_free_eofblocks(struct xfs_inode *ip);
 int	xfs_free_eofblocks(struct xfs_inode *ip);
 
 int	xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1149,7 +1149,7 @@ xfs_inode_free_eofblocks(
 	}
 	*lockflags |= XFS_IOLOCK_EXCL;
 
-	if (xfs_can_free_eofblocks(ip, false))
+	if (xfs_can_free_eofblocks(ip))
 		return xfs_free_eofblocks(ip);
 
 	/* inode could be preallocated or append-only */
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1469,7 +1469,7 @@ xfs_release(
 	if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL))
 		return 0;
 
-	if (xfs_can_free_eofblocks(ip, false)) {
+	if (xfs_can_free_eofblocks(ip)) {
 		/*
 		 * Check if the inode is being opened, written and closed
 		 * frequently and we have delayed allocation blocks outstanding
@@ -1685,15 +1685,13 @@ xfs_inode_needs_inactive(
 
 	/*
 	 * This file isn't being freed, so check if there are post-eof blocks
-	 * to free.  @force is true because we are evicting an inode from the
-	 * cache.  Post-eof blocks must be freed, lest we end up with broken
-	 * free space accounting.
+	 * to free.
 	 *
 	 * Note: don't bother with iolock here since lockdep complains about
 	 * acquiring it in reclaim context. We have the only reference to the
 	 * inode at this point anyways.
 	 */
-	return xfs_can_free_eofblocks(ip, true);
+	return xfs_can_free_eofblocks(ip);
 }
 
 /*
@@ -1741,15 +1739,11 @@ xfs_inactive(
 
 	if (VFS_I(ip)->i_nlink != 0) {
 		/*
-		 * force is true because we are evicting an inode from the
-		 * cache. Post-eof blocks must be freed, lest we end up with
-		 * broken free space accounting.
-		 *
 		 * Note: don't bother with iolock here since lockdep complains
 		 * about acquiring it in reclaim context. We have the only
 		 * reference to the inode at this point anyways.
 		 */
-		if (xfs_can_free_eofblocks(ip, true))
+		if (xfs_can_free_eofblocks(ip))
 			error = xfs_free_eofblocks(ip);
 
 		goto out;

[PATCH 6.6 043/124] xfs: allow unlinked symlinks and dirs with zero size

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 1ec9307fc066dd8a140d5430f8a7576aa9d78cd3 upstream.

For a very very long time, inode inactivation has set the inode size to
zero before unmapping the extents associated with the data fork.
Unfortunately, commit 3c6f46eacd876 changed the inode verifier to
prohibit zero-length symlinks and directories.  If an inode happens to
get logged in this state and the system crashes before freeing the
inode, log recovery will also fail on the broken inode.

Therefore, allow zero-size symlinks and directories as long as the link
count is zero; nobody will be able to open these files by handle so
there isn't any risk of data exposure.

Fixes: 3c6f46eacd876 ("xfs: sanity check directory inode di_size")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_inode_buf.c |   23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -371,10 +371,13 @@ xfs_dinode_verify_fork(
 		/*
 		 * A directory small enough to fit in the inode must be stored
 		 * in local format.  The directory sf <-> extents conversion
-		 * code updates the directory size accordingly.
+		 * code updates the directory size accordingly.  Directories
+		 * being truncated have zero size and are not subject to this
+		 * check.
 		 */
 		if (S_ISDIR(mode)) {
-			if (be64_to_cpu(dip->di_size) <= fork_size &&
+			if (dip->di_size &&
+			    be64_to_cpu(dip->di_size) <= fork_size &&
 			    fork_format != XFS_DINODE_FMT_LOCAL)
 				return __this_address;
 		}
@@ -512,9 +515,19 @@ xfs_dinode_verify(
 	if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN)
 		return __this_address;
 
-	/* No zero-length symlinks/dirs. */
-	if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0)
-		return __this_address;
+	/*
+	 * No zero-length symlinks/dirs unless they're unlinked and hence being
+	 * inactivated.
+	 */
+	if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0) {
+		if (dip->di_version > 1) {
+			if (dip->di_nlink)
+				return __this_address;
+		} else {
+			if (dip->di_onlink)
+				return __this_address;
+		}
+	}
 
 	fa = xfs_dinode_verify_nrext64(mp, dip);
 	if (fa)

[PATCH 6.6 044/124] xfs: restrict when we try to align cow fork delalloc to cowextsz hints

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Darrick J. Wong" <djwong@kernel.org>

commit 288e1f693f04e66be99f27e7cbe4a45936a66745 upstream.

xfs/205 produces the following failure when always_cow is enabled:

#  --- a/tests/xfs/205.out	2024-02-28 16:20:24.437887970 -0800
#  +++ b/tests/xfs/205.out.bad	2024-06-03 21:13:40.584000000 -0700
#  @@ -1,4 +1,5 @@
#   QA output created by 205
#   *** one file
#  +   !!! disk full (expected)
#   *** one file, a few bytes at a time
#   *** done

This is the result of overly aggressive attempts to align cow fork
delalloc reservations to the CoW extent size hint.  Looking at the trace
data, we're trying to append a single fsblock to the "fred" file.
Trying to create a speculative post-eof reservation fails because
there's not enough space.

We then set @prealloc_blocks to zero and try again, but the cowextsz
alignment code triggers, which expands our request for a 1-fsblock
reservation into a 39-block reservation.  There's not enough space for
that, so the whole write fails with ENOSPC even though there's
sufficient space in the filesystem to allocate the single block that we
need to land the write.

There are two things wrong here -- first, we shouldn't be attempting
speculative preallocations beyond what was requested when we're low on
space.  Second, if we've already computed a posteof preallocation, we
shouldn't bother trying to align that to the cowextsize hint.

Fix both of these problems by adding a flag that only enables the
expansion of the delalloc reservation to the cowextsize if we're doing a
non-extending write, and only if we're not doing an ENOSPC retry.  This
requires us to move the ENOSPC retry logic to xfs_bmapi_reserve_delalloc.

I probably should have caught this six years ago when 6ca30729c206d was
being reviewed, but oh well.  Update the comments to reflect what the
code does now.

Fixes: 6ca30729c206d ("xfs: bmap code cleanup")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_bmap.c |   31 +++++++++++++++++++++++++++----
 fs/xfs/xfs_iomap.c       |   34 ++++++++++++----------------------
 2 files changed, 39 insertions(+), 26 deletions(-)

--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -3974,20 +3974,32 @@ xfs_bmapi_reserve_delalloc(
 	xfs_extlen_t		alen;
 	xfs_extlen_t		indlen;
 	int			error;
-	xfs_fileoff_t		aoff = off;
+	xfs_fileoff_t		aoff;
+	bool			use_cowextszhint =
+					whichfork == XFS_COW_FORK && !prealloc;
 
+retry:
 	/*
 	 * Cap the alloc length. Keep track of prealloc so we know whether to
 	 * tag the inode before we return.
 	 */
+	aoff = off;
 	alen = XFS_FILBLKS_MIN(len + prealloc, XFS_MAX_BMBT_EXTLEN);
 	if (!eof)
 		alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
 	if (prealloc && alen >= len)
 		prealloc = alen - len;
 
-	/* Figure out the extent size, adjust alen */
-	if (whichfork == XFS_COW_FORK) {
+	/*
+	 * If we're targetting the COW fork but aren't creating a speculative
+	 * posteof preallocation, try to expand the reservation to align with
+	 * the COW extent size hint if there's sufficient free space.
+	 *
+	 * Unlike the data fork, the CoW cancellation functions will free all
+	 * the reservations at inactivation, so we don't require that every
+	 * delalloc reservation have a dirty pagecache.
+	 */
+	if (use_cowextszhint) {
 		struct xfs_bmbt_irec	prev;
 		xfs_extlen_t		extsz = xfs_get_cowextsz_hint(ip);
 
@@ -4006,7 +4018,7 @@ xfs_bmapi_reserve_delalloc(
 	 */
 	error = xfs_quota_reserve_blkres(ip, alen);
 	if (error)
-		return error;
+		goto out;
 
 	/*
 	 * Split changing sb for alen and indlen since they could be coming
@@ -4051,6 +4063,17 @@ out_unreserve_blocks:
 out_unreserve_quota:
 	if (XFS_IS_QUOTA_ON(mp))
 		xfs_quota_unreserve_blkres(ip, alen);
+out:
+	if (error == -ENOSPC || error == -EDQUOT) {
+		trace_xfs_delalloc_enospc(ip, off, len);
+
+		if (prealloc || use_cowextszhint) {
+			/* retry without any preallocation */
+			use_cowextszhint = false;
+			prealloc = 0;
+			goto retry;
+		}
+	}
 	return error;
 }
 
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1127,33 +1127,23 @@ xfs_buffered_write_iomap_begin(
 		}
 	}
 
-retry:
-	error = xfs_bmapi_reserve_delalloc(ip, allocfork, offset_fsb,
-			end_fsb - offset_fsb, prealloc_blocks,
-			allocfork == XFS_DATA_FORK ? &imap : &cmap,
-			allocfork == XFS_DATA_FORK ? &icur : &ccur,
-			allocfork == XFS_DATA_FORK ? eof : cow_eof);
-	switch (error) {
-	case 0:
-		break;
-	case -ENOSPC:
-	case -EDQUOT:
-		/* retry without any preallocation */
-		trace_xfs_delalloc_enospc(ip, offset, count);
-		if (prealloc_blocks) {
-			prealloc_blocks = 0;
-			goto retry;
-		}
-		fallthrough;
-	default:
-		goto out_unlock;
-	}
-
 	if (allocfork == XFS_COW_FORK) {
+		error = xfs_bmapi_reserve_delalloc(ip, allocfork, offset_fsb,
+				end_fsb - offset_fsb, prealloc_blocks, &cmap,
+				&ccur, cow_eof);
+		if (error)
+			goto out_unlock;
+
 		trace_xfs_iomap_alloc(ip, offset, count, allocfork, &cmap);
 		goto found_cow;
 	}
 
+	error = xfs_bmapi_reserve_delalloc(ip, allocfork, offset_fsb,
+			end_fsb - offset_fsb, prealloc_blocks, &imap, &icur,
+			eof);
+	if (error)
+		goto out_unlock;
+
 	/*
 	 * Flag newly allocated delalloc blocks with IOMAP_F_NEW so we punch
 	 * them out if the write happens to fail.

[PATCH 6.6 045/124] maple_tree: correct tree corruption on spanning store

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>

commit bea07fd63192b61209d48cbb81ef474cc3ee4c62 upstream.

Patch series "maple_tree: correct tree corruption on spanning store", v3.

There has been a nasty yet subtle maple tree corruption bug that appears
to have been in existence since the inception of the algorithm.

This bug seems far more likely to happen since commit f8d112a4e657
("mm/mmap: avoid zeroing vma tree in mmap_region()"), which is the point
at which reports started to be submitted concerning this bug.

We were made definitely aware of the bug thanks to the kind efforts of
Bert Karwatzki who helped enormously in my being able to track this down
and identify the cause of it.

The bug arises when an attempt is made to perform a spanning store across
two leaf nodes, where the right leaf node is the rightmost child of the
shared parent, AND the store completely consumes the right-mode node.

This results in mas_wr_spanning_store() mitakenly duplicating the new and
existing entries at the maximum pivot within the range, and thus maple
tree corruption.

The fix patch corrects this by detecting this scenario and disallowing the
mistaken duplicate copy.

The fix patch commit message goes into great detail as to how this occurs.

This series also includes a test which reliably reproduces the issue, and
asserts that the fix works correctly.

Bert has kindly tested the fix and confirmed it resolved his issues.  Also
Mikhail Gavrilov kindly reported what appears to be precisely the same
bug, which this fix should also resolve.


This patch (of 2):

There has been a subtle bug present in the maple tree implementation from
its inception.

This arises from how stores are performed - when a store occurs, it will
overwrite overlapping ranges and adjust the tree as necessary to
accommodate this.

A range may always ultimately span two leaf nodes.  In this instance we
walk the two leaf nodes, determine which elements are not overwritten to
the left and to the right of the start and end of the ranges respectively
and then rebalance the tree to contain these entries and the newly
inserted one.

This kind of store is dubbed a 'spanning store' and is implemented by
mas_wr_spanning_store().

In order to reach this stage, mas_store_gfp() invokes
mas_wr_preallocate(), mas_wr_store_type() and mas_wr_walk() in turn to
walk the tree and update the object (mas) to traverse to the location
where the write should be performed, determining its store type.

When a spanning store is required, this function returns false stopping at
the parent node which contains the target range, and mas_wr_store_type()
marks the mas->store_type as wr_spanning_store to denote this fact.

When we go to perform the store in mas_wr_spanning_store(), we first
determine the elements AFTER the END of the range we wish to store (that
is, to the right of the entry to be inserted) - we do this by walking to
the NEXT pivot in the tree (i.e.  r_mas.last + 1), starting at the node we
have just determined contains the range over which we intend to write.

We then turn our attention to the entries to the left of the entry we are
inserting, whose state is represented by l_mas, and copy these into a 'big
node', which is a special node which contains enough slots to contain two
leaf node's worth of data.

We then copy the entry we wish to store immediately after this - the copy
and the insertion of the new entry is performed by mas_store_b_node().

After this we copy the elements to the right of the end of the range which
we are inserting, if we have not exceeded the length of the node (i.e.
r_mas.offset <= r_mas.end).

Herein lies the bug - under very specific circumstances, this logic can
break and corrupt the maple tree.

Consider the following tree:

Height
  0                             Root Node
                                 /      \
                 pivot = 0xffff /        \ pivot = ULONG_MAX
                               /          \
  1                       A [-----]       ...
                             /   \
             pivot = 0x4fff /     \ pivot = 0xffff
                           /       \
  2 (LEAVES)          B [-----]  [-----] C
                                      ^--- Last pivot 0xffff.

Now imagine we wish to store an entry in the range [0x4000, 0xffff] (note
that all ranges expressed in maple tree code are inclusive):

1. mas_store_gfp() descends the tree, finds node A at <=0xffff, then
   determines that this is a spanning store across nodes B and C. The mas
   state is set such that the current node from which we traverse further
   is node A.

2. In mas_wr_spanning_store() we try to find elements to the right of pivot
   0xffff by searching for an index of 0x10000:

    - mas_wr_walk_index() invokes mas_wr_walk_descend() and
      mas_wr_node_walk() in turn.

        - mas_wr_node_walk() loops over entries in node A until EITHER it
          finds an entry whose pivot equals or exceeds 0x10000 OR it
          reaches the final entry.

        - Since no entry has a pivot equal to or exceeding 0x10000, pivot
          0xffff is selected, leading to node C.

    - mas_wr_walk_traverse() resets the mas state to traverse node C. We
      loop around and invoke mas_wr_walk_descend() and mas_wr_node_walk()
      in turn once again.

         - Again, we reach the last entry in node C, which has a pivot of
           0xffff.

3. We then copy the elements to the left of 0x4000 in node B to the big
   node via mas_store_b_node(), and insert the new [0x4000, 0xffff] entry
   too.

4. We determine whether we have any entries to copy from the right of the
   end of the range via - and with r_mas set up at the entry at pivot
   0xffff, r_mas.offset <= r_mas.end, and then we DUPLICATE the entry at
   pivot 0xffff.

5. BUG! The maple tree is corrupted with a duplicate entry.

This requires a very specific set of circumstances - we must be spanning
the last element in a leaf node, which is the last element in the parent
node.

spanning store across two leaf nodes with a range that ends at that shared
pivot.

A potential solution to this problem would simply be to reset the walk
each time we traverse r_mas, however given the rarity of this situation it
seems that would be rather inefficient.

Instead, this patch detects if the right hand node is populated, i.e.  has
anything we need to copy.

We do so by only copying elements from the right of the entry being
inserted when the maximum value present exceeds the last, rather than
basing this on offset position.

The patch also updates some comments and eliminates the unused bool return
value in mas_wr_walk_index().

The work performed in commit f8d112a4e657 ("mm/mmap: avoid zeroing vma
tree in mmap_region()") seems to have made the probability of this event
much more likely, which is the point at which reports started to be
submitted concerning this bug.

The motivation for this change arose from Bert Karwatzki's report of
encountering mm instability after the release of kernel v6.12-rc1 which,
after the use of CONFIG_DEBUG_VM_MAPLE_TREE and similar configuration
options, was identified as maple tree corruption.

After Bert very generously provided his time and ability to reproduce this
event consistently, I was able to finally identify that the issue
discussed in this commit message was occurring for him.

Link: https://lkml.kernel.org/r/cover.1728314402.git.lorenzo.stoakes@oracle.com
Link: https://lkml.kernel.org/r/48b349a2a0f7c76e18772712d0997a5e12ab0a3b.1728314403.git.lorenzo.stoakes@oracle.com
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: Bert Karwatzki <spasswolf@web.de>
Closes: https://lore.kernel.org/all/20241001023402.3374-1-spasswolf@web.de/
Tested-by: Bert Karwatzki <spasswolf@web.de>
Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Closes: https://lore.kernel.org/all/CABXGCsOPwuoNOqSMmAvWO2Fz4TEmPnjFj-b7iF+XFRu1h7-+Dg@mail.gmail.com/
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/maple_tree.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -2228,6 +2228,8 @@ static inline struct maple_enode *mte_no
 
 /*
  * mas_wr_node_walk() - Find the correct offset for the index in the @mas.
+ *                      If @mas->index cannot be found within the containing
+ *                      node, we traverse to the last entry in the node.
  * @wr_mas: The maple write state
  *
  * Uses mas_slot_locked() and does not need to worry about dead nodes.
@@ -3643,7 +3645,7 @@ static bool mas_wr_walk(struct ma_wr_sta
 	return true;
 }
 
-static bool mas_wr_walk_index(struct ma_wr_state *wr_mas)
+static void mas_wr_walk_index(struct ma_wr_state *wr_mas)
 {
 	struct ma_state *mas = wr_mas->mas;
 
@@ -3652,11 +3654,9 @@ static bool mas_wr_walk_index(struct ma_
 		wr_mas->content = mas_slot_locked(mas, wr_mas->slots,
 						  mas->offset);
 		if (ma_is_leaf(wr_mas->type))
-			return true;
+			return;
 		mas_wr_walk_traverse(wr_mas);
-
 	}
-	return true;
 }
 /*
  * mas_extend_spanning_null() - Extend a store of a %NULL to include surrounding %NULLs.
@@ -3892,8 +3892,8 @@ static inline int mas_wr_spanning_store(
 	memset(&b_node, 0, sizeof(struct maple_big_node));
 	/* Copy l_mas and store the value in b_node. */
 	mas_store_b_node(&l_wr_mas, &b_node, l_wr_mas.node_end);
-	/* Copy r_mas into b_node. */
-	if (r_mas.offset <= r_wr_mas.node_end)
+	/* Copy r_mas into b_node if there is anything to copy. */
+	if (r_mas.max > r_mas.last)
 		mas_mab_cp(&r_mas, r_mas.offset, r_wr_mas.node_end,
 			   &b_node, b_node.b_end + 1);
 	else

[PATCH 6.6 046/124] net: fec: Move `fec_ptp_read()` to the top of the file

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Csókás, Bence <csokas.bence@prolan.hu>

commit 4374a1fe580a14f6152752390c678d90311df247 upstream.

This function is used in `fec_ptp_enable_pps()` through
struct cyclecounter read(). Moving the declaration makes
it clearer, what's happening.

Suggested-by: Frank Li <Frank.li@nxp.com>
Link: https://lore.kernel.org/netdev/20240805144754.2384663-1-csokas.bence@prolan.hu/T/#ma6c21ad264016c24612048b1483769eaff8cdf20
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240812094713.2883476-1-csokas.bence@prolan.hu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/fec_ptp.c |   50 +++++++++++++++----------------
 1 file changed, 25 insertions(+), 25 deletions(-)

--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ b/drivers/net/ethernet/freescale/fec_ptp.c
@@ -91,6 +91,30 @@
 #define FEC_PTP_MAX_NSEC_COUNTER	0x80000000ULL
 
 /**
+ * fec_ptp_read - read raw cycle counter (to be used by time counter)
+ * @cc: the cyclecounter structure
+ *
+ * this function reads the cyclecounter registers and is called by the
+ * cyclecounter structure used to construct a ns counter from the
+ * arbitrary fixed point registers
+ */
+static u64 fec_ptp_read(const struct cyclecounter *cc)
+{
+	struct fec_enet_private *fep =
+		container_of(cc, struct fec_enet_private, cc);
+	u32 tempval;
+
+	tempval = readl(fep->hwp + FEC_ATIME_CTRL);
+	tempval |= FEC_T_CTRL_CAPTURE;
+	writel(tempval, fep->hwp + FEC_ATIME_CTRL);
+
+	if (fep->quirks & FEC_QUIRK_BUG_CAPTURE)
+		udelay(1);
+
+	return readl(fep->hwp + FEC_ATIME);
+}
+
+/**
  * fec_ptp_enable_pps
  * @fep: the fec_enet_private structure handle
  * @enable: enable the channel pps output
@@ -136,7 +160,7 @@ static int fec_ptp_enable_pps(struct fec
 		 * NSEC_PER_SEC - ts.tv_nsec. Add the remaining nanoseconds
 		 * to current timer would be next second.
 		 */
-		tempval = fep->cc.read(&fep->cc);
+		tempval = fec_ptp_read(&fep->cc);
 		/* Convert the ptp local counter to 1588 timestamp */
 		ns = timecounter_cyc2time(&fep->tc, tempval);
 		ts = ns_to_timespec64(ns);
@@ -272,30 +296,6 @@ static enum hrtimer_restart fec_ptp_pps_
 }
 
 /**
- * fec_ptp_read - read raw cycle counter (to be used by time counter)
- * @cc: the cyclecounter structure
- *
- * this function reads the cyclecounter registers and is called by the
- * cyclecounter structure used to construct a ns counter from the
- * arbitrary fixed point registers
- */
-static u64 fec_ptp_read(const struct cyclecounter *cc)
-{
-	struct fec_enet_private *fep =
-		container_of(cc, struct fec_enet_private, cc);
-	u32 tempval;
-
-	tempval = readl(fep->hwp + FEC_ATIME_CTRL);
-	tempval |= FEC_T_CTRL_CAPTURE;
-	writel(tempval, fep->hwp + FEC_ATIME_CTRL);
-
-	if (fep->quirks & FEC_QUIRK_BUG_CAPTURE)
-		udelay(1);
-
-	return readl(fep->hwp + FEC_ATIME);
-}
-
-/**
  * fec_ptp_start_cyclecounter - create the cycle counter from hw
  * @ndev: network device
  *

[PATCH 6.6 047/124] net: fec: Remove duplicated code

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Csókás, Bence <csokas.bence@prolan.hu>

commit 713ebaed68d88121cbaf5e74104e2290a9ea74bd upstream.

`fec_ptp_pps_perout()` reimplements logic already
in `fec_ptp_read()`. Replace with function call.

Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240812094713.2883476-2-csokas.bence@prolan.hu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/fec_ptp.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ b/drivers/net/ethernet/freescale/fec_ptp.c
@@ -235,13 +235,7 @@ static int fec_ptp_pps_perout(struct fec
 	timecounter_read(&fep->tc);
 
 	/* Get the current ptp hardware time counter */
-	temp_val = readl(fep->hwp + FEC_ATIME_CTRL);
-	temp_val |= FEC_T_CTRL_CAPTURE;
-	writel(temp_val, fep->hwp + FEC_ATIME_CTRL);
-	if (fep->quirks & FEC_QUIRK_BUG_CAPTURE)
-		udelay(1);
-
-	ptp_hc = readl(fep->hwp + FEC_ATIME);
+	ptp_hc = fec_ptp_read(&fep->cc);
 
 	/* Convert the ptp local counter to 1588 timestamp */
 	curr_time = timecounter_cyc2time(&fep->tc, ptp_hc);

[PATCH 6.6 048/124] mptcp: prevent MPC handshake on port-based signal endpoints

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Abeni <pabeni@redhat.com>

commit 3d041393ea8c815f773020fb4a995331a69c0139 upstream.

Syzkaller reported a lockdep splat:

  ============================================
  WARNING: possible recursive locking detected
  6.11.0-rc6-syzkaller-00019-g67784a74e258 #0 Not tainted
  --------------------------------------------
  syz-executor364/5113 is trying to acquire lock:
  ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
  ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

  but task is already holding lock:
  ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
  ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

  other info that might help us debug this:
   Possible unsafe locking scenario:

         CPU0
         ----
    lock(k-slock-AF_INET);
    lock(k-slock-AF_INET);

   *** DEADLOCK ***

   May be due to missing lock nesting notation

  7 locks held by syz-executor364/5113:
   #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
   #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg+0x153/0x1b10 net/mptcp/protocol.c:1806
   #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
   #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg_fastopen+0x11f/0x530 net/mptcp/protocol.c:1727
   #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
   #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
   #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit+0x5f/0x1b80 net/ipv4/ip_output.c:470
   #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
   #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
   #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x45f/0x1390 net/ipv4/ip_output.c:228
   #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
   #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: process_backlog+0x33b/0x15b0 net/core/dev.c:6104
   #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
   #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
   #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish+0x230/0x5f0 net/ipv4/ip_input.c:232
   #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
   #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

  stack backtrace:
  CPU: 0 UID: 0 PID: 5113 Comm: syz-executor364 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
  Call Trace:
   <IRQ>
   __dump_stack lib/dump_stack.c:93 [inline]
   dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
   check_deadlock kernel/locking/lockdep.c:3061 [inline]
   validate_chain+0x15d3/0x5900 kernel/locking/lockdep.c:3855
   __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
   lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
   spin_lock include/linux/spinlock.h:351 [inline]
   sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328
   mptcp_sk_clone_init+0x32/0x13c0 net/mptcp/protocol.c:3279
   subflow_syn_recv_sock+0x931/0x1920 net/mptcp/subflow.c:874
   tcp_check_req+0xfe4/0x1a20 net/ipv4/tcp_minisocks.c:853
   tcp_v4_rcv+0x1c3e/0x37f0 net/ipv4/tcp_ipv4.c:2267
   ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
   ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
   NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
   NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
   __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
   __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
   process_backlog+0x662/0x15b0 net/core/dev.c:6108
   __napi_poll+0xcb/0x490 net/core/dev.c:6772
   napi_poll net/core/dev.c:6841 [inline]
   net_rx_action+0x89b/0x1240 net/core/dev.c:6963
   handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
   do_softirq+0x11b/0x1e0 kernel/softirq.c:455
   </IRQ>
   <TASK>
   __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
   local_bh_enable include/linux/bottom_half.h:33 [inline]
   rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
   __dev_queue_xmit+0x1763/0x3e90 net/core/dev.c:4450
   dev_queue_xmit include/linux/netdevice.h:3105 [inline]
   neigh_hh_output include/net/neighbour.h:526 [inline]
   neigh_output include/net/neighbour.h:540 [inline]
   ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
   ip_local_out net/ipv4/ip_output.c:129 [inline]
   __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:535
   __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
   tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6542 [inline]
   tcp_rcv_state_process+0x2c32/0x4570 net/ipv4/tcp_input.c:6729
   tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1934
   sk_backlog_rcv include/net/sock.h:1111 [inline]
   __release_sock+0x214/0x350 net/core/sock.c:3004
   release_sock+0x61/0x1f0 net/core/sock.c:3558
   mptcp_sendmsg_fastopen+0x1ad/0x530 net/mptcp/protocol.c:1733
   mptcp_sendmsg+0x1884/0x1b10 net/mptcp/protocol.c:1812
   sock_sendmsg_nosec net/socket.c:730 [inline]
   __sock_sendmsg+0x1a6/0x270 net/socket.c:745
   ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
   ___sys_sendmsg net/socket.c:2651 [inline]
   __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737
   __do_sys_sendmmsg net/socket.c:2766 [inline]
   __se_sys_sendmmsg net/socket.c:2763 [inline]
   __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f
  RIP: 0033:0x7f04fb13a6b9
  Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
  RSP: 002b:00007ffd651f42d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
  RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f04fb13a6b9
  RDX: 0000000000000001 RSI: 0000000020000d00 RDI: 0000000000000004
  RBP: 00007ffd651f4310 R08: 0000000000000001 R09: 0000000000000001
  R10: 0000000020000080 R11: 0000000000000246 R12: 00000000000f4240
  R13: 00007f04fb187449 R14: 00007ffd651f42f4 R15: 00007ffd651f4300
   </TASK>

As noted by Cong Wang, the splat is false positive, but the code
path leading to the report is an unexpected one: a client is
attempting an MPC handshake towards the in-kernel listener created
by the in-kernel PM for a port based signal endpoint.

Such connection will be never accepted; many of them can make the
listener queue full and preventing the creation of MPJ subflow via
such listener - its intended role.

Explicitly detect this scenario at initial-syn time and drop the
incoming MPC request.

Fixes: 1729cf186d8a ("mptcp: create the listening socket for new port")
Cc: stable@vger.kernel.org
Reported-by: syzbot+f4aacdfef2c6a6529c3e@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=f4aacdfef2c6a6529c3e
Cc: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20241014-net-mptcp-mpc-port-endp-v2-1-7faea8e6b6ae@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[ Conflicts in mib.[ch], because commit 6982826fe5e5 ("mptcp: fallback
  to TCP after SYN+MPC drops"), and commit 27069e7cb3d1 ("mptcp: disable
  active MPTCP in case of blackhole") are linked to new features, not
  available in this version. Resolving the conflicts is easy, simply
  adding the new lines declaring the new "endpoint attempt" MIB entry. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mptcp/mib.c        |    1 +
 net/mptcp/mib.h        |    1 +
 net/mptcp/pm_netlink.c |    1 +
 net/mptcp/protocol.h   |    1 +
 net/mptcp/subflow.c    |   11 +++++++++++
 5 files changed, 15 insertions(+)

--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -15,6 +15,7 @@ static const struct snmp_mib mptcp_snmp_
 	SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
 	SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
 	SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
+	SNMP_MIB_ITEM("MPCapableEndpAttempt", MPTCP_MIB_MPCAPABLEENDPATTEMPT),
 	SNMP_MIB_ITEM("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT),
 	SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
 	SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -8,6 +8,7 @@ enum linux_mptcp_mib_field {
 	MPTCP_MIB_MPCAPABLEPASSIVEACK,	/* Received third ACK with MP_CAPABLE */
 	MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK,/* Server-side fallback during 3-way handshake */
 	MPTCP_MIB_MPCAPABLEACTIVEFALLBACK, /* Client-side fallback during 3-way handshake */
+	MPTCP_MIB_MPCAPABLEENDPATTEMPT,	/* Prohibited MPC to port-based endp */
 	MPTCP_MIB_TOKENFALLBACKINIT,	/* Could not init/allocate token */
 	MPTCP_MIB_RETRANSSEGS,		/* Segments retransmitted at the MPTCP-level */
 	MPTCP_MIB_JOINNOTOKEN,		/* Received MP_JOIN but the token was not found */
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -1125,6 +1125,7 @@ static int mptcp_pm_nl_create_listen_soc
 	 */
 	inet_sk_state_store(newsk, TCP_LISTEN);
 	lock_sock(ssk);
+	WRITE_ONCE(mptcp_subflow_ctx(ssk)->pm_listener, true);
 	err = __inet_listen_sk(ssk, backlog);
 	if (!err)
 		mptcp_event_pm_listener(ssk, MPTCP_EVENT_LISTENER_CREATED);
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -504,6 +504,7 @@ struct mptcp_subflow_context {
 		__unused : 9;
 	enum mptcp_data_avail data_avail;
 	bool	scheduled;
+	bool	pm_listener;	    /* a listener managed by the kernel PM? */
 	u32	remote_nonce;
 	u64	thmac;
 	u32	local_nonce;
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -132,6 +132,13 @@ static void subflow_add_reset_reason(str
 	}
 }
 
+static int subflow_reset_req_endp(struct request_sock *req, struct sk_buff *skb)
+{
+	SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEENDPATTEMPT);
+	subflow_add_reset_reason(skb, MPTCP_RST_EPROHIBIT);
+	return -EPERM;
+}
+
 /* Init mptcp request socket.
  *
  * Returns an error code if a JOIN has failed and a TCP reset
@@ -163,6 +170,8 @@ static int subflow_check_req(struct requ
 	if (opt_mp_capable) {
 		SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE);
 
+		if (unlikely(listener->pm_listener))
+			return subflow_reset_req_endp(req, skb);
 		if (opt_mp_join)
 			return 0;
 	} else if (opt_mp_join) {
@@ -170,6 +179,8 @@ static int subflow_check_req(struct requ
 
 		if (mp_opt.backup)
 			SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINSYNBACKUPRX);
+	} else if (unlikely(listener->pm_listener)) {
+		return subflow_reset_req_endp(req, skb);
 	}
 
 	if (opt_mp_capable && listener->request_mptcp) {

[PATCH 6.6 049/124] iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lu Baolu <baolu.lu@linux.intel.com>

commit 6e02a277f1db24fa039e23783c8921c7b0e5b1b3 upstream.

Previously, the domain_context_clear() function incorrectly called
pci_for_each_dma_alias() to set up context entries for non-PCI devices.
This could lead to kernel hangs or other unexpected behavior.

Add a check to only call pci_for_each_dma_alias() for PCI devices. For
non-PCI devices, domain_context_clear_one() is called directly.

Reported-by: Todd Brandt <todd.e.brandt@intel.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219363
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219349
Fixes: 9a16ab9d6402 ("iommu/vt-d: Make context clearing consistent with context mapping")
Cc: stable@vger.kernel.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20241014013744.102197-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iommu/intel/iommu.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -3925,8 +3925,10 @@ static int domain_context_clear_one_cb(s
  */
 static void domain_context_clear(struct device_domain_info *info)
 {
-	if (!dev_is_pci(info->dev))
+	if (!dev_is_pci(info->dev)) {
 		domain_context_clear_one(info, info->bus, info->devfn);
+		return;
+	}
 
 	pci_for_each_dma_alias(to_pci_dev(info->dev),
 			       &domain_context_clear_one_cb, info);

[PATCH 6.6 050/124] s390/sclp: Deactivate sclp after all its users

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

commit 0d9dc27df22d9b5c8dc7185c8dddbc14f5468518 upstream.

On reboot the SCLP interface is deactivated through a reboot notifier.
This happens before other components using SCLP have the chance to run
their own reboot notifiers.
Two of those components are the SCLP console and tty drivers which try
to flush the last outstanding messages.
At that point the SCLP interface is already unusable and the messages
are discarded.

Execute sclp_deactivate() as late as possible to avoid this issue.

Fixes: 4ae46db99cd8 ("s390/consoles: improve panic notifiers reliability")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20241014-s390-kunit-v1-1-941defa765a6@linutronix.de
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/s390/char/sclp.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -1195,7 +1195,8 @@ sclp_reboot_event(struct notifier_block
 }
 
 static struct notifier_block sclp_reboot_notifier = {
-	.notifier_call = sclp_reboot_event
+	.notifier_call = sclp_reboot_event,
+	.priority      = INT_MIN,
 };
 
 static ssize_t con_pages_show(struct device_driver *dev, char *buf)

[PATCH 6.6 051/124] s390/sclp_vt220: Convert newlines to CRLF instead of LFCR

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

commit dee3df68ab4b00fff6bdf9fc39541729af37307c upstream.

According to the VT220 specification the possible character combinations
sent on RETURN are only CR or CRLF [0].

	The Return key sends either a CR character (0/13) or a CR
	character (0/13) and an LF character (0/10), depending on the
	set/reset state of line feed/new line mode (LNM).

The sclp/vt220 driver however uses LFCR. This can confuse tools, for
example the kunit runner.

Link: https://vt100.net/docs/vt220-rm/chapter3.html#S3.2
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20241014-s390-kunit-v1-2-941defa765a6@linutronix.de
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/s390/char/sclp_vt220.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -319,7 +319,7 @@ sclp_vt220_add_msg(struct sclp_vt220_req
 	buffer = (void *) ((addr_t) sccb + sccb->header.length);
 
 	if (convertlf) {
-		/* Perform Linefeed conversion (0x0a -> 0x0a 0x0d)*/
+		/* Perform Linefeed conversion (0x0a -> 0x0d 0x0a)*/
 		for (from=0, to=0;
 		     (from < count) && (to < sclp_vt220_space_left(request));
 		     from++) {
@@ -328,8 +328,8 @@ sclp_vt220_add_msg(struct sclp_vt220_req
 			/* Perform conversion */
 			if (c == 0x0a) {
 				if (to + 1 < sclp_vt220_space_left(request)) {
-					((unsigned char *) buffer)[to++] = c;
 					((unsigned char *) buffer)[to++] = 0x0d;
+					((unsigned char *) buffer)[to++] = c;
 				} else
 					break;
 

[PATCH 6.6 052/124] KVM: s390: gaccess: Check if guest address is in memslot

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nico Boehr <nrb@linux.ibm.com>

commit e8061f06185be0a06a73760d6526b8b0feadfe52 upstream.

Previously, access_guest_page() did not check whether the given guest
address is inside of a memslot. This is not a problem, since
kvm_write_guest_page/kvm_read_guest_page return -EFAULT in this case.

However, -EFAULT is also returned when copy_to/from_user fails.

When emulating a guest instruction, the address being outside a memslot
usually means that an addressing exception should be injected into the
guest.

Failure in copy_to/from_user however indicates that something is wrong
in userspace and hence should be handled there.

To be able to distinguish these two cases, return PGM_ADDRESSING in
access_guest_page() when the guest address is outside guest memory. In
access_guest_real(), populate vcpu->arch.pgm.code such that
kvm_s390_inject_prog_cond() can be used in the caller for injecting into
the guest (if applicable).

Since this adds a new return value to access_guest_page(), we need to make
sure that other callers are not confused by the new positive return value.

There are the following users of access_guest_page():
- access_guest_with_key() does the checking itself (in
  guest_range_to_gpas()), so this case should never happen. Even if, the
  handling is set up properly.
- access_guest_real() just passes the return code to its callers, which
  are:
    - read_guest_real() - see below
    - write_guest_real() - see below

There are the following users of read_guest_real():
- ar_translation() in gaccess.c which already returns PGM_*
- setup_apcb10(), setup_apcb00(), setup_apcb11() in vsie.c which always
  return -EFAULT on read_guest_read() nonzero return - no change
- shadow_crycb(), handle_stfle() always present this as validity, this
  could be handled better but doesn't change current behaviour - no change

There are the following users of write_guest_real():
- kvm_s390_store_status_unloaded() always returns -EFAULT on
  write_guest_real() failure.

Fixes: 2293897805c2 ("KVM: s390: add architecture compliant guest access functions")
Cc: stable@vger.kernel.org
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/20240917151904.74314-2-nrb@linux.ibm.com
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/s390/kvm/gaccess.c |    4 ++++
 arch/s390/kvm/gaccess.h |   14 ++++++++------
 2 files changed, 12 insertions(+), 6 deletions(-)

--- a/arch/s390/kvm/gaccess.c
+++ b/arch/s390/kvm/gaccess.c
@@ -1001,6 +1001,8 @@ static int access_guest_page(struct kvm
 	const gfn_t gfn = gpa_to_gfn(gpa);
 	int rc;
 
+	if (!gfn_to_memslot(kvm, gfn))
+		return PGM_ADDRESSING;
 	if (mode == GACC_STORE)
 		rc = kvm_write_guest_page(kvm, gfn, data, offset, len);
 	else
@@ -1158,6 +1160,8 @@ int access_guest_real(struct kvm_vcpu *v
 		gra += fragment_len;
 		data += fragment_len;
 	}
+	if (rc > 0)
+		vcpu->arch.pgm.code = rc;
 	return rc;
 }
 
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -405,11 +405,12 @@ int read_guest_abs(struct kvm_vcpu *vcpu
  * @len: number of bytes to copy
  *
  * Copy @len bytes from @data (kernel space) to @gra (guest real address).
- * It is up to the caller to ensure that the entire guest memory range is
- * valid memory before calling this function.
  * Guest low address and key protection are not checked.
  *
- * Returns zero on success or -EFAULT on error.
+ * Returns zero on success, -EFAULT when copying from @data failed, or
+ * PGM_ADRESSING in case @gra is outside a memslot. In this case, pgm check info
+ * is also stored to allow injecting into the guest (if applicable) using
+ * kvm_s390_inject_prog_cond().
  *
  * If an error occurs data may have been copied partially to guest memory.
  */
@@ -428,11 +429,12 @@ int write_guest_real(struct kvm_vcpu *vc
  * @len: number of bytes to copy
  *
  * Copy @len bytes from @gra (guest real address) to @data (kernel space).
- * It is up to the caller to ensure that the entire guest memory range is
- * valid memory before calling this function.
  * Guest key protection is not checked.
  *
- * Returns zero on success or -EFAULT on error.
+ * Returns zero on success, -EFAULT when copying to @data failed, or
+ * PGM_ADRESSING in case @gra is outside a memslot. In this case, pgm check info
+ * is also stored to allow injecting into the guest (if applicable) using
+ * kvm_s390_inject_prog_cond().
  *
  * If an error occurs data may have been copied partially to kernel space.
  */

[PATCH 6.6 053/124] KVM: s390: Change virtual to physical address access in diag 0x258 handler

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Mueller <mimu@linux.ibm.com>

commit cad4b3d4ab1f062708fff33f44d246853f51e966 upstream.

The parameters for the diag 0x258 are real addresses, not virtual, but
KVM was using them as virtual addresses. This only happened to work, since
the Linux kernel as a guest used to have a 1:1 mapping for physical vs
virtual addresses.

Fix KVM so that it correctly uses the addresses as real addresses.

Cc: stable@vger.kernel.org
Fixes: 8ae04b8f500b ("KVM: s390: Guest's memory access functions get access registers")
Suggested-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/20240917151904.74314-3-nrb@linux.ibm.com
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/s390/kvm/diag.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -77,7 +77,7 @@ static int __diag_page_ref_service(struc
 	vcpu->stat.instruction_diagnose_258++;
 	if (vcpu->run->s.regs.gprs[rx] & 7)
 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
-	rc = read_guest(vcpu, vcpu->run->s.regs.gprs[rx], rx, &parm, sizeof(parm));
+	rc = read_guest_real(vcpu, vcpu->run->s.regs.gprs[rx], &parm, sizeof(parm));
 	if (rc)
 		return kvm_s390_inject_prog_cond(vcpu, rc);
 	if (parm.parm_version != 2 || parm.parm_len < 5 || parm.code != 0x258)

[PATCH 6.6 054/124] x86/cpufeatures: Define X86_FEATURE_AMD_IBPB_RET

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jim Mattson <jmattson@google.com>

commit ff898623af2ed564300752bba83a680a1e4fec8d upstream.

AMD's initial implementation of IBPB did not clear the return address
predictor. Beginning with Zen4, AMD's IBPB *does* clear the return address
predictor. This behavior is enumerated by CPUID.80000008H:EBX.IBPB_RET[30].

Define X86_FEATURE_AMD_IBPB_RET for use in KVM_GET_SUPPORTED_CPUID,
when determining cross-vendor capabilities.

Suggested-by: Venkatesh Srinivas <venkateshs@chromium.org>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/include/asm/cpufeatures.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -216,7 +216,7 @@
 #define X86_FEATURE_SPEC_STORE_BYPASS_DISABLE	( 7*32+23) /* "" Disable Speculative Store Bypass. */
 #define X86_FEATURE_LS_CFG_SSBD		( 7*32+24)  /* "" AMD SSBD implementation via LS_CFG MSR */
 #define X86_FEATURE_IBRS		( 7*32+25) /* Indirect Branch Restricted Speculation */
-#define X86_FEATURE_IBPB		( 7*32+26) /* Indirect Branch Prediction Barrier */
+#define X86_FEATURE_IBPB		( 7*32+26) /* "ibpb" Indirect Branch Prediction Barrier without a guaranteed RSB flush */
 #define X86_FEATURE_STIBP		( 7*32+27) /* Single Thread Indirect Branch Predictors */
 #define X86_FEATURE_ZEN			( 7*32+28) /* "" Generic flag for all Zen and newer */
 #define X86_FEATURE_L1TF_PTEINV		( 7*32+29) /* "" L1TF workaround PTE inversion */
@@ -347,6 +347,7 @@
 #define X86_FEATURE_CPPC		(13*32+27) /* Collaborative Processor Performance Control */
 #define X86_FEATURE_AMD_PSFD            (13*32+28) /* "" Predictive Store Forwarding Disable */
 #define X86_FEATURE_BTC_NO		(13*32+29) /* "" Not vulnerable to Branch Type Confusion */
+#define X86_FEATURE_AMD_IBPB_RET	(13*32+30) /* "" IBPB clears return address predictor */
 #define X86_FEATURE_BRS			(13*32+31) /* Branch Sampling available */
 
 /* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */

[PATCH 6.6 055/124] x86/cpufeatures: Add a IBPB_NO_RET BUG flag

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Wikner <kwikner@ethz.ch>

commit 3ea87dfa31a7b0bb0ff1675e67b9e54883013074 upstream.

Set this flag if the CPU has an IBPB implementation that does not
invalidate return target predictions. Zen generations < 4 do not flush
the RSB when executing an IBPB and this bug flag denotes that.

  [ bp: Massage. ]

Signed-off-by: Johannes Wikner <kwikner@ethz.ch>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/include/asm/cpufeatures.h |    1 +
 arch/x86/kernel/cpu/common.c       |    3 +++
 2 files changed, 4 insertions(+)

--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -517,4 +517,5 @@
 #define X86_BUG_DIV0			X86_BUG(1*32 + 1) /* AMD DIV0 speculation bug */
 #define X86_BUG_RFDS			X86_BUG(1*32 + 2) /* CPU is vulnerable to Register File Data Sampling */
 #define X86_BUG_BHI			X86_BUG(1*32 + 3) /* CPU is affected by Branch History Injection */
+#define X86_BUG_IBPB_NO_RET		X86_BUG(1*32 + 4) /* "ibpb_no_ret" IBPB omits return target predictions */
 #endif /* _ASM_X86_CPUFEATURES_H */
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1483,6 +1483,9 @@ static void __init cpu_set_bug_bits(stru
 	     boot_cpu_has(X86_FEATURE_HYPERVISOR)))
 		setup_force_cpu_bug(X86_BUG_BHI);
 
+	if (cpu_has(c, X86_FEATURE_AMD_IBPB) && !cpu_has(c, X86_FEATURE_AMD_IBPB_RET))
+		setup_force_cpu_bug(X86_BUG_IBPB_NO_RET);
+
 	if (cpu_matches(cpu_vuln_whitelist, NO_MELTDOWN))
 		return;
 

[PATCH 6.6 056/124] x86/entry: Have entry_ibpb() invalidate return predictions

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Wikner <kwikner@ethz.ch>

commit 50e4b3b94090babe8d4bb85c95f0d3e6b07ea86e upstream.

entry_ibpb() should invalidate all indirect predictions, including return
target predictions. Not all IBPB implementations do this, in which case the
fallback is RSB filling.

Prevent SRSO-style hijacks of return predictions following IBPB, as the return
target predictor can be corrupted before the IBPB completes.

  [ bp: Massage. ]

Signed-off-by: Johannes Wikner <kwikner@ethz.ch>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/entry/entry.S |    5 +++++
 1 file changed, 5 insertions(+)

--- a/arch/x86/entry/entry.S
+++ b/arch/x86/entry/entry.S
@@ -9,6 +9,8 @@
 #include <asm/unwind_hints.h>
 #include <asm/segment.h>
 #include <asm/cache.h>
+#include <asm/cpufeatures.h>
+#include <asm/nospec-branch.h>
 
 .pushsection .noinstr.text, "ax"
 
@@ -17,6 +19,9 @@ SYM_FUNC_START(entry_ibpb)
 	movl	$PRED_CMD_IBPB, %eax
 	xorl	%edx, %edx
 	wrmsr
+
+	/* Make sure IBPB clears return stack preductions too. */
+	FILL_RETURN_BUFFER %rax, RSB_CLEAR_LOOPS, X86_BUG_IBPB_NO_RET
 	RET
 SYM_FUNC_END(entry_ibpb)
 /* For KVM */

[PATCH 6.6 057/124] x86/bugs: Skip RSB fill at VMEXIT

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Wikner <kwikner@ethz.ch>

commit 0fad2878642ec46225af2054564932745ac5c765 upstream.

entry_ibpb() is designed to follow Intel's IBPB specification regardless
of CPU. This includes invalidating RSB entries.

Hence, if IBPB on VMEXIT has been selected, entry_ibpb() as part of the
RET untraining in the VMEXIT path will take care of all BTB and RSB
clearing so there's no need to explicitly fill the RSB anymore.

  [ bp: Massage commit message. ]

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Johannes Wikner <kwikner@ethz.ch>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/cpu/bugs.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1115,6 +1115,14 @@ do_cmd_auto:
 		setup_force_cpu_cap(X86_FEATURE_ENTRY_IBPB);
 		setup_force_cpu_cap(X86_FEATURE_IBPB_ON_VMEXIT);
 		mitigate_smt = true;
+
+		/*
+		 * There is no need for RSB filling: entry_ibpb() ensures
+		 * all predictions, including the RSB, are invalidated,
+		 * regardless of IBPB implementation.
+		 */
+		setup_clear_cpu_cap(X86_FEATURE_RSB_VMEXIT);
+
 		break;
 
 	case RETBLEED_MITIGATION_STUFF:
@@ -2622,6 +2630,13 @@ static void __init srso_select_mitigatio
 			if (!boot_cpu_has(X86_FEATURE_ENTRY_IBPB) && has_microcode) {
 				setup_force_cpu_cap(X86_FEATURE_IBPB_ON_VMEXIT);
 				srso_mitigation = SRSO_MITIGATION_IBPB_ON_VMEXIT;
+
+				/*
+				 * There is no need for RSB filling: entry_ibpb() ensures
+				 * all predictions, including the RSB, are invalidated,
+				 * regardless of IBPB implementation.
+				 */
+				setup_clear_cpu_cap(X86_FEATURE_RSB_VMEXIT);
 			}
 		} else {
 			pr_err("WARNING: kernel not compiled with CPU_SRSO.\n");

[PATCH 6.6 058/124] x86/bugs: Do not use UNTRAIN_RET with IBPB on entry

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Wikner <kwikner@ethz.ch>

commit c62fa117c32bd1abed9304c58e0da6940f8c7fc2 upstream.

Since X86_FEATURE_ENTRY_IBPB will invalidate all harmful predictions
with IBPB, no software-based untraining of returns is needed anymore.
Currently, this change affects retbleed and SRSO mitigations so if
either of the mitigations is doing IBPB and the other one does the
software sequence, the latter is not needed anymore.

  [ bp: Massage commit message. ]

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Johannes Wikner <kwikner@ethz.ch>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/cpu/bugs.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1113,6 +1113,15 @@ do_cmd_auto:
 
 	case RETBLEED_MITIGATION_IBPB:
 		setup_force_cpu_cap(X86_FEATURE_ENTRY_IBPB);
+
+		/*
+		 * IBPB on entry already obviates the need for
+		 * software-based untraining so clear those in case some
+		 * other mitigation like SRSO has selected them.
+		 */
+		setup_clear_cpu_cap(X86_FEATURE_UNRET);
+		setup_clear_cpu_cap(X86_FEATURE_RETHUNK);
+
 		setup_force_cpu_cap(X86_FEATURE_IBPB_ON_VMEXIT);
 		mitigate_smt = true;
 
@@ -2618,6 +2627,14 @@ static void __init srso_select_mitigatio
 			if (has_microcode) {
 				setup_force_cpu_cap(X86_FEATURE_ENTRY_IBPB);
 				srso_mitigation = SRSO_MITIGATION_IBPB;
+
+				/*
+				 * IBPB on entry already obviates the need for
+				 * software-based untraining so clear those in case some
+				 * other mitigation like Retbleed has selected them.
+				 */
+				setup_clear_cpu_cap(X86_FEATURE_UNRET);
+				setup_clear_cpu_cap(X86_FEATURE_RETHUNK);
 			}
 		} else {
 			pr_err("WARNING: kernel not compiled with CPU_IBPB_ENTRY.\n");

[PATCH 6.6 059/124] blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Omar Sandoval <osandov@fb.com>

commit e972b08b91ef48488bae9789f03cfedb148667fb upstream.

We're seeing crashes from rq_qos_wake_function that look like this:

  BUG: unable to handle page fault for address: ffffafe180a40084
  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  PGD 100000067 P4D 100000067 PUD 10027c067 PMD 10115d067 PTE 0
  Oops: Oops: 0002 [#1] PREEMPT SMP PTI
  CPU: 17 UID: 0 PID: 0 Comm: swapper/17 Not tainted 6.12.0-rc3-00013-geca631b8fe80 #11
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
  RIP: 0010:_raw_spin_lock_irqsave+0x1d/0x40
  Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 54 9c 41 5c fa 65 ff 05 62 97 30 4c 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 0a 4c 89 e0 41 5c c3 cc cc cc cc 89 c6 e8 2c 0b 00
  RSP: 0018:ffffafe180580ca0 EFLAGS: 00010046
  RAX: 0000000000000000 RBX: ffffafe180a3f7a8 RCX: 0000000000000011
  RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffafe180a40084
  RBP: 0000000000000000 R08: 00000000001e7240 R09: 0000000000000011
  R10: 0000000000000028 R11: 0000000000000888 R12: 0000000000000002
  R13: ffffafe180a40084 R14: 0000000000000000 R15: 0000000000000003
  FS:  0000000000000000(0000) GS:ffff9aaf1f280000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: ffffafe180a40084 CR3: 000000010e428002 CR4: 0000000000770ef0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  PKRU: 55555554
  Call Trace:
   <IRQ>
   try_to_wake_up+0x5a/0x6a0
   rq_qos_wake_function+0x71/0x80
   __wake_up_common+0x75/0xa0
   __wake_up+0x36/0x60
   scale_up.part.0+0x50/0x110
   wb_timer_fn+0x227/0x450
   ...

So rq_qos_wake_function() calls wake_up_process(data->task), which calls
try_to_wake_up(), which faults in raw_spin_lock_irqsave(&p->pi_lock).

p comes from data->task, and data comes from the waitqueue entry, which
is stored on the waiter's stack in rq_qos_wait(). Analyzing the core
dump with drgn, I found that the waiter had already woken up and moved
on to a completely unrelated code path, clobbering what was previously
data->task. Meanwhile, the waker was passing the clobbered garbage in
data->task to wake_up_process(), leading to the crash.

What's happening is that in between rq_qos_wake_function() deleting the
waitqueue entry and calling wake_up_process(), rq_qos_wait() is finding
that it already got a token and returning. The race looks like this:

rq_qos_wait()                           rq_qos_wake_function()
==============================================================
prepare_to_wait_exclusive()
                                        data->got_token = true;
                                        list_del_init(&curr->entry);
if (data.got_token)
        break;
finish_wait(&rqw->wait, &data.wq);
  ^- returns immediately because
     list_empty_careful(&wq_entry->entry)
     is true
... return, go do something else ...
                                        wake_up_process(data->task)
                                          (NO LONGER VALID!)-^

Normally, finish_wait() is supposed to synchronize against the waker.
But, as noted above, it is returning immediately because the waitqueue
entry has already been removed from the waitqueue.

The bug is that rq_qos_wake_function() is accessing the waitqueue entry
AFTER deleting it. Note that autoremove_wake_function() wakes the waiter
and THEN deletes the waitqueue entry, which is the proper order.

Fix it by swapping the order. We also need to use
list_del_init_careful() to match the list_empty_careful() in
finish_wait().

Fixes: 38cfb5a45ee0 ("blk-wbt: improve waking of tasks")
Cc: stable@vger.kernel.org
Signed-off-by: Omar Sandoval <osandov@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/d3bee2463a67b1ee597211823bf7ad3721c26e41.1729014591.git.osandov@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 block/blk-rq-qos.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -219,8 +219,8 @@ static int rq_qos_wake_function(struct w
 
 	data->got_token = true;
 	smp_wmb();
-	list_del_init(&curr->entry);
 	wake_up_process(data->task);
+	list_del_init_careful(&curr->entry);
 	return 1;
 }
 

[PATCH 6.6 060/124] io_uring/sqpoll: close race on waiting for sqring entries

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jens Axboe <axboe@kernel.dk>

commit 28aabffae6be54284869a91cd8bccd3720041129 upstream.

When an application uses SQPOLL, it must wait for the SQPOLL thread to
consume SQE entries, if it fails to get an sqe when calling
io_uring_get_sqe(). It can do so by calling io_uring_enter(2) with the
flag value of IORING_ENTER_SQ_WAIT. In liburing, this is generally done
with io_uring_sqring_wait(). There's a natural expectation that once
this call returns, a new SQE entry can be retrieved, filled out, and
submitted. However, the kernel uses the cached sq head to determine if
the SQRING is full or not. If the SQPOLL thread is currently in the
process of submitting SQE entries, it may have updated the cached sq
head, but not yet committed it to the SQ ring. Hence the kernel may find
that there are SQE entries ready to be consumed, and return successfully
to the application. If the SQPOLL thread hasn't yet committed the SQ
ring entries by the time the application returns to userspace and
attempts to get a new SQE, it will fail getting a new SQE.

Fix this by having io_sqring_full() always use the user visible SQ ring
head entry, rather than the internally cached one.

Cc: stable@vger.kernel.org # 5.10+
Link: https://github.com/axboe/liburing/discussions/1267
Reported-by: Benedek Thaler <thaler@thaler.hu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 io_uring/io_uring.h |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -262,7 +262,14 @@ static inline bool io_sqring_full(struct
 {
 	struct io_rings *r = ctx->rings;
 
-	return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries;
+	/*
+	 * SQPOLL must use the actual sqring head, as using the cached_sq_head
+	 * is race prone if the SQPOLL thread has grabbed entries but not yet
+	 * committed them to the ring. For !SQPOLL, this doesn't matter, but
+	 * since this helper is just used for SQPOLL sqring waits (or POLLOUT),
+	 * just read the actual sqring head unconditionally.
+	 */
+	return READ_ONCE(r->sq.tail) - READ_ONCE(r->sq.head) == ctx->sq_entries;
 }
 
 static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx)

[PATCH 6.6 061/124] ublk: dont allow user copy for unprivileged device

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ming Lei <ming.lei@redhat.com>

commit 42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6 upstream.

UBLK_F_USER_COPY requires userspace to call write() on ublk char
device for filling request buffer, and unprivileged device can't
be trusted.

So don't allow user copy for unprivileged device.

Cc: stable@vger.kernel.org
Fixes: 1172d5b8beca ("ublk: support user copy")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20241016134847.2911721-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/block/ublk_drv.c      |   11 ++++++++++-
 include/uapi/linux/ublk_cmd.h |    8 +++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -2327,10 +2327,19 @@ static int ublk_ctrl_add_dev(struct io_u
 	 * TODO: provide forward progress for RECOVERY handler, so that
 	 * unprivileged device can benefit from it
 	 */
-	if (info.flags & UBLK_F_UNPRIVILEGED_DEV)
+	if (info.flags & UBLK_F_UNPRIVILEGED_DEV) {
 		info.flags &= ~(UBLK_F_USER_RECOVERY_REISSUE |
 				UBLK_F_USER_RECOVERY);
 
+		/*
+		 * For USER_COPY, we depends on userspace to fill request
+		 * buffer by pwrite() to ublk char device, which can't be
+		 * used for unprivileged device
+		 */
+		if (info.flags & UBLK_F_USER_COPY)
+			return -EINVAL;
+	}
+
 	/* the created device is always owned by current user */
 	ublk_store_owner_uid_gid(&info.owner_uid, &info.owner_gid);
 
--- a/include/uapi/linux/ublk_cmd.h
+++ b/include/uapi/linux/ublk_cmd.h
@@ -173,7 +173,13 @@
 /* use ioctl encoding for uring command */
 #define UBLK_F_CMD_IOCTL_ENCODE	(1UL << 6)
 
-/* Copy between request and user buffer by pread()/pwrite() */
+/*
+ *  Copy between request and user buffer by pread()/pwrite()
+ *
+ *  Not available for UBLK_F_UNPRIVILEGED_DEV, otherwise userspace may
+ *  deceive us by not filling request buffer, then kernel uninitialized
+ *  data may be leaked.
+ */
 #define UBLK_F_USER_COPY	(1UL << 7)
 
 /*

[PATCH 6.6 062/124] selftest: hid: add the missing tests directory

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yun Lu <luyun@kylinos.cn>

commit fe05c40ca9c18cfdb003f639a30fc78a7ab49519 upstream.

Commit 160c826b4dd0 ("selftest: hid: add missing run-hid-tools-tests.sh")
has added the run-hid-tools-tests.sh script for it to be installed, but
I forgot to add the tests directory together.

If running the test case without the tests directory,  will results in
the following error message:

    make -C tools/testing/selftests/ TARGETS=hid install \
	    INSTALL_PATH=$KSFT_INSTALL_PATH
    cd $KSFT_INSTALL_PATH
    ./run_kselftest.sh -t hid:hid-core.sh

  /usr/lib/python3.11/site-packages/_pytest/config/__init__.py:331: PluggyTeardownRaisedWarning: A plugin raised an exception during an old-style hookwrapper teardown.
  Plugin: helpconfig, Hook: pytest_cmdline_parse
  UsageError: usage: __main__.py [options] [file_or_dir] [file_or_dir] [...]
  __main__.py: error: unrecognized arguments: --udevd
    inifile: None
    rootdir: /root/linux/kselftest_install/hid

In fact, the run-hid-tools-tests.sh script uses the scripts in the tests
directory to run tests. The tests directory also needs to be added to be
installed.

Fixes: ffb85d5c9e80 ("selftests: hid: import hid-tools hid-core tests")
Cc: stable@vger.kernel.org
Signed-off-by: Yun Lu <luyun@kylinos.cn>
Acked-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/hid/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 38ae31bb07b5..662209f5fabc 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -18,6 +18,7 @@ TEST_PROGS += hid-usb_crash.sh
 TEST_PROGS += hid-wacom.sh
 
 TEST_FILES := run-hid-tools-tests.sh
+TEST_FILES += tests
 
 CXX ?= $(CROSS_COMPILE)g++
 
-- 
2.47.0

[PATCH 6.6 063/124] Input: xpad - add support for MSI Claw A1M

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Edwards <uejji@uejji.net>

commit 22a18935d7d96bbb1a28076f843c1926d0ba189e upstream.

Add MSI Claw A1M controller to xpad_device match table when in xinput mode.
Add MSI VID as XPAD_XBOX360_VENDOR.

Signed-off-by: John Edwards <uejji@uejji.net>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Reviewed-by: Christopher Snowhill <kode54@gmail.com>
Link: https://lore.kernel.org/r/20241010232020.3292284-4-uejji@uejji.net
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/input/joystick/xpad.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -217,6 +217,7 @@ static const struct xpad_device {
 	{ 0x0c12, 0x8810, "Zeroplus Xbox Controller", 0, XTYPE_XBOX },
 	{ 0x0c12, 0x9902, "HAMA VibraX - *FAULTY HARDWARE*", 0, XTYPE_XBOX },
 	{ 0x0d2f, 0x0002, "Andamiro Pump It Up pad", MAP_DPAD_TO_BUTTONS, XTYPE_XBOX },
+	{ 0x0db0, 0x1901, "Micro Star International Xbox360 Controller for Windows", 0, XTYPE_XBOX360 },
 	{ 0x0e4c, 0x1097, "Radica Gamester Controller", 0, XTYPE_XBOX },
 	{ 0x0e4c, 0x1103, "Radica Gamester Reflex", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOX },
 	{ 0x0e4c, 0x2390, "Radica Games Jtech Controller", 0, XTYPE_XBOX },
@@ -486,6 +487,7 @@ static const struct usb_device_id xpad_t
 	XPAD_XBOX360_VENDOR(0x07ff),		/* Mad Catz Gamepad */
 	XPAD_XBOXONE_VENDOR(0x0b05),		/* ASUS controllers */
 	XPAD_XBOX360_VENDOR(0x0c12),		/* Zeroplus X-Box 360 controllers */
+	XPAD_XBOX360_VENDOR(0x0db0),		/* Micro Star International X-Box 360 controllers */
 	XPAD_XBOX360_VENDOR(0x0e6f),		/* 0x0e6f Xbox 360 controllers */
 	XPAD_XBOXONE_VENDOR(0x0e6f),		/* 0x0e6f Xbox One controllers */
 	XPAD_XBOX360_VENDOR(0x0f0d),		/* Hori controllers */

[PATCH 6.6 064/124] scsi: ufs: core: Set SDEV_OFFLINE when UFS is shut down

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Seunghwan Baek <sh8267.baek@samsung.com>

commit 19a198b67767d952c8f3d0cf24eb3100522a8223 upstream.

There is a history of deadlock if reboot is performed at the beginning
of booting. SDEV_QUIESCE was set for all LU's scsi_devices by UFS
shutdown, and at that time the audio driver was waiting on
blk_mq_submit_bio() holding a mutex_lock while reading the fw binary.
After that, a deadlock issue occurred while audio driver shutdown was
waiting for mutex_unlock of blk_mq_submit_bio(). To solve this, set
SDEV_OFFLINE for all LUs except WLUN, so that any I/O that comes down
after a UFS shutdown will return an error.

[   31.907781]I[0:      swapper/0:    0]        1        130705007       1651079834      11289729804                0 D(   2) 3 ffffff882e208000 *             init [device_shutdown]
[   31.907793]I[0:      swapper/0:    0] Mutex: 0xffffff8849a2b8b0: owner[0xffffff882e28cb00 kworker/6:0 :49]
[   31.907806]I[0:      swapper/0:    0] Call trace:
[   31.907810]I[0:      swapper/0:    0]  __switch_to+0x174/0x338
[   31.907819]I[0:      swapper/0:    0]  __schedule+0x5ec/0x9cc
[   31.907826]I[0:      swapper/0:    0]  schedule+0x7c/0xe8
[   31.907834]I[0:      swapper/0:    0]  schedule_preempt_disabled+0x24/0x40
[   31.907842]I[0:      swapper/0:    0]  __mutex_lock+0x408/0xdac
[   31.907849]I[0:      swapper/0:    0]  __mutex_lock_slowpath+0x14/0x24
[   31.907858]I[0:      swapper/0:    0]  mutex_lock+0x40/0xec
[   31.907866]I[0:      swapper/0:    0]  device_shutdown+0x108/0x280
[   31.907875]I[0:      swapper/0:    0]  kernel_restart+0x4c/0x11c
[   31.907883]I[0:      swapper/0:    0]  __arm64_sys_reboot+0x15c/0x280
[   31.907890]I[0:      swapper/0:    0]  invoke_syscall+0x70/0x158
[   31.907899]I[0:      swapper/0:    0]  el0_svc_common+0xb4/0xf4
[   31.907909]I[0:      swapper/0:    0]  do_el0_svc+0x2c/0xb0
[   31.907918]I[0:      swapper/0:    0]  el0_svc+0x34/0xe0
[   31.907928]I[0:      swapper/0:    0]  el0t_64_sync_handler+0x68/0xb4
[   31.907937]I[0:      swapper/0:    0]  el0t_64_sync+0x1a0/0x1a4

[   31.908774]I[0:      swapper/0:    0]       49                0         11960702      11236868007                0 D(   2) 6 ffffff882e28cb00 *      kworker/6:0 [__bio_queue_enter]
[   31.908783]I[0:      swapper/0:    0] Call trace:
[   31.908788]I[0:      swapper/0:    0]  __switch_to+0x174/0x338
[   31.908796]I[0:      swapper/0:    0]  __schedule+0x5ec/0x9cc
[   31.908803]I[0:      swapper/0:    0]  schedule+0x7c/0xe8
[   31.908811]I[0:      swapper/0:    0]  __bio_queue_enter+0xb8/0x178
[   31.908818]I[0:      swapper/0:    0]  blk_mq_submit_bio+0x194/0x67c
[   31.908827]I[0:      swapper/0:    0]  __submit_bio+0xb8/0x19c

Fixes: b294ff3e3449 ("scsi: ufs: core: Enable power management for wlun")
Cc: stable@vger.kernel.org
Signed-off-by: Seunghwan Baek <sh8267.baek@samsung.com>
Link: https://lore.kernel.org/r/20240829093913.6282-2-sh8267.baek@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/ufs/core/ufshcd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -10100,7 +10100,9 @@ static void ufshcd_wl_shutdown(struct de
 	shost_for_each_device(sdev, hba->host) {
 		if (sdev == hba->ufs_device_wlun)
 			continue;
-		scsi_device_quiesce(sdev);
+		mutex_lock(&sdev->state_mutex);
+		scsi_device_set_state(sdev, SDEV_OFFLINE);
+		mutex_unlock(&sdev->state_mutex);
 	}
 	__ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM);
 

[PATCH 6.6 065/124] scsi: ufs: core: Fix the issue of ICU failure

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Wang <peter.wang@mediatek.com>

commit bf0c6cc73f7f91ec70307f7c72343f6cb7d65d01 upstream.

When setting the ICU bit without using read-modify-write, SQRTCy will
restart SQ again and receive an RTC return error code 2 (Failure - SQ
not stopped).

Additionally, the error log has been modified so that this type of error
can be observed.

Fixes: ab248643d3d6 ("scsi: ufs: core: Add error handling for MCQ mode")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20241001091917.6917-2-peter.wang@mediatek.com
Reviewed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/ufs/core/ufs-mcq.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -498,7 +498,7 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba
 	struct scsi_cmnd *cmd = lrbp->cmd;
 	struct ufs_hw_queue *hwq;
 	void __iomem *reg, *opr_sqd_base;
-	u32 nexus, id, val;
+	u32 nexus, id, val, rtc;
 	int err;
 
 	if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC)
@@ -528,17 +528,18 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba
 	opr_sqd_base = mcq_opr_base(hba, OPR_SQD, id);
 	writel(nexus, opr_sqd_base + REG_SQCTI);
 
-	/* SQRTCy.ICU = 1 */
-	writel(SQ_ICU, opr_sqd_base + REG_SQRTC);
+	/* Initiate Cleanup */
+	writel(readl(opr_sqd_base + REG_SQRTC) | SQ_ICU,
+		opr_sqd_base + REG_SQRTC);
 
 	/* Poll SQRTSy.CUS = 1. Return result from SQRTSy.RTC */
 	reg = opr_sqd_base + REG_SQRTS;
 	err = read_poll_timeout(readl, val, val & SQ_CUS, 20,
 				MCQ_POLL_US, false, reg);
-	if (err)
-		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%ld\n",
-			__func__, id, task_tag,
-			FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg)));
+	rtc = FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg));
+	if (err || rtc)
+		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%d RTC=%d\n",
+			__func__, id, task_tag, err, rtc);
 
 	if (ufshcd_mcq_sq_start(hba, hwq))
 		err = -ETIMEDOUT;

[PATCH 6.6 066/124] drm/radeon: Fix encoder->possible_clones

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

commit 28127dba64d8ae1a0b737b973d6d029908599611 upstream.

Include the encoder itself in its possible_clones bitmask.
In the past nothing validated that drivers were populating
possible_clones correctly, but that changed in commit
74d2aacbe840 ("drm: Validate encoder->possible_clones").
Looks like radeon never got the memo and is still not
following the rules 100% correctly.

This results in some warnings during driver initialization:
Bogus possible_clones: [ENCODER:46:TV-46] possible_clones=0x4 (full encoder mask=0x7)
WARNING: CPU: 0 PID: 170 at drivers/gpu/drm/drm_mode_config.c:615 drm_mode_config_validate+0x113/0x39c
...

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Fixes: 74d2aacbe840 ("drm: Validate encoder->possible_clones")
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Closes: https://lore.kernel.org/dri-devel/20241009000321.418e4294@yea/
Tested-by: Erhard Furtner <erhard_f@mailbox.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 3b6e7d40649c0d75572039aff9d0911864c689db)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/radeon/radeon_encoders.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -42,7 +42,7 @@ static uint32_t radeon_encoder_clones(st
 	struct radeon_device *rdev = dev->dev_private;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_encoder *clone_encoder;
-	uint32_t index_mask = 0;
+	uint32_t index_mask = drm_encoder_mask(encoder);
 	int count;
 
 	/* DIG routing gets problematic */

[PATCH 6.6 067/124] drm/vmwgfx: Handle surface check failure correctly

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nikolay Kuratov <kniv@yandex-team.ru>

commit 26498b8d54373d31a621d7dec95c4bd842563b3b upstream.

Currently if condition (!bo and !vmw_kms_srf_ok()) was met
we go to err_out with ret == 0.
err_out dereferences vfb if ret == 0, but in our case vfb is still NULL.

Fix this by assigning sensible error to ret.

Found by Linux Verification Center (linuxtesting.org) with SVACE

Signed-off-by: Nikolay Kuratov <kniv@yandex-team.ru>
Cc: stable@vger.kernel.org
Fixes: 810b3e1683d0 ("drm/vmwgfx: Support topology greater than texture size")
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241002122429.1981822-1-kniv@yandex-team.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1659,6 +1659,7 @@ static struct drm_framebuffer *vmw_kms_f
 		DRM_ERROR("Surface size cannot exceed %dx%d\n",
 			dev_priv->texture_max_width,
 			dev_priv->texture_max_height);
+		ret = -EINVAL;
 		goto err_out;
 	}
 

[PATCH 6.6 068/124] drm/amdgpu/swsmu: Only force workload setup on init

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit cb07c8338fc2b9d5f949a19d4a07ee4d5ecf8793 upstream.

Needed to set the workload type at init time so that
we can apply the navi3x margin optimization.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3618
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3131
Fixes: c50fe289ed72 ("drm/amdgpu/swsmu: always force a state reprogram on init")
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 580ad7cbd4b7be8d2cb5ab5c1fca6bb76045eb0e)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -1843,7 +1843,7 @@ static int smu_bump_power_profile_mode(s
 static int smu_adjust_power_state_dynamic(struct smu_context *smu,
 					  enum amd_dpm_forced_level level,
 					  bool skip_display_settings,
-					  bool force_update)
+					  bool init)
 {
 	int ret = 0;
 	int index = 0;
@@ -1872,7 +1872,7 @@ static int smu_adjust_power_state_dynami
 		}
 	}
 
-	if (force_update || smu_dpm_ctx->dpm_level != level) {
+	if (smu_dpm_ctx->dpm_level != level) {
 		ret = smu_asic_set_performance_level(smu, level);
 		if (ret) {
 			dev_err(smu->adev->dev, "Failed to set performance level!");
@@ -1889,7 +1889,7 @@ static int smu_adjust_power_state_dynami
 		index = index > 0 && index <= WORKLOAD_POLICY_MAX ? index - 1 : 0;
 		workload[0] = smu->workload_setting[index];
 
-		if (force_update || smu->power_profile_mode != workload[0])
+		if (init || smu->power_profile_mode != workload[0])
 			smu_bump_power_profile_mode(smu, workload, 0);
 	}
 

[PATCH 6.6 069/124] drm/amdgpu: prevent BO_HANDLES error from being overwritten

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mohammed Anees <pvmohammedanees2003@gmail.com>

commit c0ec082f10b7a1fd25e8c1e2a686440da913b7a3 upstream.

Before this patch, if multiple BO_HANDLES chunks were submitted,
the error -EINVAL would be correctly set but could be overwritten
by the return value from amdgpu_cs_p1_bo_handles(). This patch
ensures that if there are multiple BO_HANDLES, we stop.

Fixes: fec5f8e8c6bc ("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit")
Signed-off-by: Mohammed Anees <pvmohammedanees2003@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 40f2cd98828f454bdc5006ad3d94330a5ea164b7)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -265,7 +265,7 @@ static int amdgpu_cs_pass1(struct amdgpu
 
 			/* Only a single BO list is allowed to simplify handling. */
 			if (p->bo_list)
-				ret = -EINVAL;
+				goto free_partial_kdata;
 
 			ret = amdgpu_cs_p1_bo_handles(p, p->chunks[i].kdata);
 			if (ret)

[PATCH 6.6 070/124] iio: dac: ad5770r: add missing select REGMAP_SPI in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit bcdab6f74c91cda19714354fd4e9e3ef3c9a78b3 upstream.

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: cbbb819837f6 ("iio: dac: ad5770r: Add AD5770R support")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-6-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/dac/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -224,6 +224,7 @@ config AD5766
 config AD5770R
 	tristate "Analog Devices AD5770R IDAC driver"
 	depends on SPI_MASTER
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Analog Devices AD5770R Digital to
 	  Analog Converter.

[PATCH 6.6 071/124] iio: dac: ltc1660: add missing select REGMAP_SPI in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 252ff06a4cb4e572cb3c7fcfa697db96b08a7781 upstream.

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: 8316cebd1e59 ("iio: dac: add support for ltc1660")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-7-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/dac/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -316,6 +316,7 @@ config LPC18XX_DAC
 config LTC1660
 	tristate "Linear Technology LTC1660/LTC1665 DAC SPI driver"
 	depends on SPI
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Linear Technology
 	  LTC1660 and LTC1665 Digital to Analog Converters.

[PATCH 6.6 072/124] iio: dac: stm32-dac-core: add missing select REGMAP_MMIO in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 27b6aa68a68105086aef9f0cb541cd688e5edea8 upstream.

This driver makes use of regmap_mmio, but does not select the required
module.
Add the missing 'select REGMAP_MMIO'.

Fixes: 4d4b30526eb8 ("iio: dac: add support for stm32 DAC")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-8-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/dac/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -426,6 +426,7 @@ config STM32_DAC
 
 config STM32_DAC_CORE
 	tristate
+	select REGMAP_MMIO
 
 config TI_DAC082S085
 	tristate "Texas Instruments 8/10/12-bit 2/4-channel DAC driver"

[PATCH 6.6 073/124] iio: adc: ti-ads8688: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 4c4834fd8696a949d1b1f1c2c5b96e1ad2083b02 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Fixes: 2a86487786b5 ("iio: adc: ti-ads8688: add trigger and buffer support")
Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Sean Nyekjaer <sean@geanix.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-4-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -1286,6 +1286,8 @@ config TI_ADS8344
 config TI_ADS8688
 	tristate "Texas Instruments ADS8688"
 	depends on SPI
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  If you say yes here you get support for Texas Instruments ADS8684 and
 	  and ADS8688 ADC chips

[PATCH 6.6 074/124] iio: hid-sensors: Fix an error handling path in _hid_sensor_set_report_latency()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit 3a29b84cf7fbf912a6ab1b9c886746f02b74ea25 upstream.

If hid_sensor_set_report_latency() fails, the error code should be returned
instead of a value likely to be interpreted as 'success'.

Fixes: 138bc7969c24 ("iio: hid-sensor-hub: Implement batch mode")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/c50640665f091a04086e5092cf50f73f2055107a.1727980825.git.christophe.jaillet@wanadoo.fr
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/common/hid-sensors/hid-sensor-trigger.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -32,7 +32,7 @@ static ssize_t _hid_sensor_set_report_la
 	latency = integer * 1000 + fract / 1000;
 	ret = hid_sensor_set_report_latency(attrb, latency);
 	if (ret < 0)
-		return len;
+		return ret;
 
 	attrb->latency_ms = hid_sensor_get_report_latency(attrb);
 

[PATCH 6.6 075/124] iio: light: veml6030: fix ALS sensor resolution

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit c9e9746f275c45108f2b0633a4855d65d9ae0736 upstream.

The driver still uses the sensor resolution provided in the datasheet
until Rev. 1.6, 28-Apr-2022, which was updated with Rev 1.7,
28-Nov-2023. The original ambient light resolution has been updated from
0.0036 lx/ct to 0.0042 lx/ct, which is the value that can be found in
the current device datasheet.

Update the default resolution for IT = 100 ms and GAIN = 1/8 from the
original 4608 mlux/cnt to the current value from the "Resolution and
maximum detection range" table (Application Note 84367, page 5), 5376
mlux/cnt.

Cc: <stable@vger.kernel.org>
Fixes: 7b779f573c48 ("iio: light: add driver for veml6030 ambient light sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20240923-veml6035-v2-1-58c72a0df31c@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/veml6030.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/light/veml6030.c
+++ b/drivers/iio/light/veml6030.c
@@ -780,7 +780,7 @@ static int veml6030_hw_init(struct iio_d
 
 	/* Cache currently active measurement parameters */
 	data->cur_gain = 3;
-	data->cur_resolution = 4608;
+	data->cur_resolution = 5376;
 	data->cur_integration_time = 3;
 
 	return ret;

[PATCH 6.6 076/124] iio: light: veml6030: fix IIO device retrieval from embedded device

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit c7c44e57750c31de43906d97813273fdffcf7d02 upstream.

The dev pointer that is received as an argument in the
in_illuminance_period_available_show function references the device
embedded in the IIO device, not in the i2c client.

dev_to_iio_dev() must be used to accessthe right data. The current
implementation leads to a segmentation fault on every attempt to read
the attribute because indio_dev gets a NULL assignment.

This bug has been present since the first appearance of the driver,
apparently since the last version (V6) before getting applied. A
constant attribute was used until then, and the last modifications might
have not been tested again.

Cc: stable@vger.kernel.org
Fixes: 7b779f573c48 ("iio: light: add driver for veml6030 ambient light sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20240913-veml6035-v1-3-0b09c0c90418@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/veml6030.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/iio/light/veml6030.c
+++ b/drivers/iio/light/veml6030.c
@@ -99,9 +99,8 @@ static const char * const period_values[
 static ssize_t in_illuminance_period_available_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
+	struct veml6030_data *data = iio_priv(dev_to_iio_dev(dev));
 	int ret, reg, x;
-	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
-	struct veml6030_data *data = iio_priv(indio_dev);
 
 	ret = regmap_read(data->regmap, VEML6030_REG_ALS_CONF, &reg);
 	if (ret) {

[PATCH 6.6 077/124] iio: light: opt3001: add missing full-scale range value

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Emil Gedenryd <emil.gedenryd@axis.com>

commit 530688e39c644543b71bdd9cb45fdfb458a28eaa upstream.

The opt3001 driver uses predetermined full-scale range values to
determine what exponent to use for event trigger threshold values.
The problem is that one of the values specified in the datasheet is
missing from the implementation. This causes larger values to be
scaled down to an incorrect exponent, effectively reducing the
maximum settable threshold value by a factor of 2.

Add missing full-scale range array value.

Fixes: 94a9b7b1809f ("iio: light: add support for TI's opt3001 light sensor")
Signed-off-by: Emil Gedenryd <emil.gedenryd@axis.com>
Cc: <Stable@vger.kernel.org>
Link: https://patch.msgid.link/20240913-add_opt3002-v2-1-69e04f840360@axis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/opt3001.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -139,6 +139,10 @@ static const struct opt3001_scale opt300
 		.val2 = 400000,
 	},
 	{
+		.val = 41932,
+		.val2 = 800000,
+	},
+	{
 		.val = 83865,
 		.val2 = 600000,
 	},

[PATCH 6.6 078/124] iio: amplifiers: ada4250: add missing select REGMAP_SPI in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit b7983033a10baa0d98784bb411b2679bfb207d9a upstream.

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: 28b4c30bfa5f ("iio: amplifiers: ada4250: add support for ADA4250")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-5-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/amplifiers/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/amplifiers/Kconfig
+++ b/drivers/iio/amplifiers/Kconfig
@@ -27,6 +27,7 @@ config AD8366
 config ADA4250
 	tristate "Analog Devices ADA4250 Instrumentation Amplifier"
 	depends on SPI
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Analog Devices ADA4250
 	  SPI Amplifier's support. The driver provides direct access via

[PATCH 6.6 079/124] iio: frequency: adf4377: add missing select REMAP_SPI in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit c64643ed4eaa5dfd0b3bab7ef1c50b84f3dbaba4 upstream.

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: eda549e2e524 ("iio: frequency: adf4377: add support for ADF4377")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-3-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/frequency/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/frequency/Kconfig
+++ b/drivers/iio/frequency/Kconfig
@@ -53,6 +53,7 @@ config ADF4371
 config ADF4377
 	tristate "Analog Devices ADF4377 Microwave Wideband Synthesizer"
 	depends on SPI && COMMON_CLK
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Analog Devices ADF4377 Microwave
 	  Wideband Synthesizer.

[PATCH 6.6 080/124] iio: light: bu27008: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit aa99ef68eff5bc6df4959a372ae355b3b73f9930 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 41ff93d14f78 ("iio: light: ROHM BU27008 color sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Acked-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-10-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -294,6 +294,8 @@ config ROHM_BU27008
 	depends on I2C
 	select REGMAP_I2C
 	select IIO_GTS_HELPER
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Enable support for the ROHM BU27008 color sensor.
 	  The ROHM BU27008 is a sensor with 5 photodiodes (red, green,

[PATCH 6.6 081/124] iio: dac: ad5766: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 62ec3df342cca6a8eb7ed33fd4ac8d0fbfcb9391 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 885b9790c25a ("drivers:iio:dac:ad5766.c: Add trigger buffer")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-8-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/dac/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -214,6 +214,8 @@ config AD5764
 config AD5766
 	tristate "Analog Devices AD5766/AD5767 DAC driver"
 	depends on SPI_MASTER
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Analog Devices AD5766, AD5767
 	  Digital to Analog Converter.

[PATCH 6.6 082/124] iio: proximity: mb1232: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 75461a0b15d7c026924d0001abce0476bbc7eda8 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 16b05261537e ("mb1232.c: add distance iio sensor with i2c")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-13-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/proximity/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/proximity/Kconfig
+++ b/drivers/iio/proximity/Kconfig
@@ -72,6 +72,8 @@ config LIDAR_LITE_V2
 config MB1232
 	tristate "MaxSonar I2CXL family ultrasonic sensors"
 	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say Y to build a driver for the ultrasonic sensors I2CXL of
 	  MaxBotix which have an i2c interface. It can be used to measure

[PATCH 6.6 083/124] iio: dac: ad3552r: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 5bede948670f447154df401458aef4e2fd446ba8 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-7-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/dac/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -9,6 +9,8 @@ menu "Digital to analog converters"
 config AD3552R
 	tristate "Analog Devices AD3552R DAC driver"
 	depends on SPI_MASTER
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Analog Devices AD3552R
 	  Digital to Analog Converter.

[PATCH 6.6 084/124] iio: adc: ti-lmp92064: add missing select REGMAP_SPI in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit f3fe8c52c580e99c6dc0c7859472ec48176af32d upstream.

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: 627198942641 ("iio: adc: add ADC driver for the TI LMP92064 controller")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-5-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -1332,6 +1332,7 @@ config TI_AM335X_ADC
 config TI_LMP92064
 	tristate "Texas Instruments LMP92064 ADC driver"
 	depends on SPI
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for the LMP92064 Precision Current and Voltage
 	  sensor.

[PATCH 6.6 085/124] iio: adc: ti-ads124s08: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit eb143d05def52bc6d193e813018e5fa1a0e47c77 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: e717f8c6dfec ("iio: adc: Add the TI ads124s08 ADC code")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-3-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -1298,6 +1298,8 @@ config TI_ADS8688
 config TI_ADS124S08
 	tristate "Texas Instruments ADS124S08"
 	depends on SPI
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  If you say yes here you get support for Texas Instruments ADS124S08
 	  and ADS124S06 ADC chips

[PATCH 6.6 086/124] iio: accel: kx022a: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Carrasco <javier.carrasco.cruz@gmail.com>

commit 96666f05d11acf0370cedca17a4c3ab6f9554b35 upstream.

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 7c1d1677b322 ("iio: accel: Support Kionix/ROHM KX022A accelerometer")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Acked-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://patch.msgid.link/20241003-iio-select-v1-1-67c0385197cd@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/accel/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -415,6 +415,8 @@ config IIO_ST_ACCEL_SPI_3AXIS
 
 config IIO_KX022A
 	tristate
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 
 config IIO_KX022A_SPI
 	tristate "Kionix KX022A tri-axis digital accelerometer SPI interface"

[PATCH 6.6 087/124] Bluetooth: Call iso_exit() on module unload

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Aaron Thompson <dev@aaront.org>

commit d458cd1221e9e56da3b2cc5518ad3225caa91f20 upstream.

If iso_init() has been called, iso_exit() must be called on module
unload. Without that, the struct proto that iso_init() registered with
proto_register() becomes invalid, which could cause unpredictable
problems later. In my case, with CONFIG_LIST_HARDENED and
CONFIG_BUG_ON_DATA_CORRUPTION enabled, loading the module again usually
triggers this BUG():

  list_add corruption. next->prev should be prev (ffffffffb5355fd0),
    but was 0000000000000068. (next=ffffffffc0a010d0).
  ------------[ cut here ]------------
  kernel BUG at lib/list_debug.c:29!
  Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI
  CPU: 1 PID: 4159 Comm: modprobe Not tainted 6.10.11-4+bt2-ao-desktop #1
  RIP: 0010:__list_add_valid_or_report+0x61/0xa0
  ...
    __list_add_valid_or_report+0x61/0xa0
    proto_register+0x299/0x320
    hci_sock_init+0x16/0xc0 [bluetooth]
    bt_init+0x68/0xd0 [bluetooth]
    __pfx_bt_init+0x10/0x10 [bluetooth]
    do_one_initcall+0x80/0x2f0
    do_init_module+0x8b/0x230
    __do_sys_init_module+0x15f/0x190
    do_syscall_64+0x68/0x110
  ...

Cc: stable@vger.kernel.org
Fixes: ccf74f2390d6 ("Bluetooth: Add BTPROTO_ISO socket type")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/bluetooth/af_bluetooth.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -830,6 +830,8 @@ cleanup_led:
 
 static void __exit bt_exit(void)
 {
+	iso_exit();
+
 	mgmt_exit();
 
 	sco_exit();

[PATCH 6.6 088/124] Bluetooth: Remove debugfs directory on module init failure

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Aaron Thompson <dev@aaront.org>

commit 1db4564f101b47188c1b71696bd342ef09172b22 upstream.

If bt_init() fails, the debugfs directory currently is not removed. If
the module is loaded again after that, the debugfs directory is not set
up properly due to the existing directory.

  # modprobe bluetooth
  # ls -laF /sys/kernel/debug/bluetooth
  total 0
  drwxr-xr-x  2 root root 0 Sep 27 14:26 ./
  drwx------ 31 root root 0 Sep 27 14:25 ../
  -r--r--r--  1 root root 0 Sep 27 14:26 l2cap
  -r--r--r--  1 root root 0 Sep 27 14:26 sco
  # modprobe -r bluetooth
  # ls -laF /sys/kernel/debug/bluetooth
  ls: cannot access '/sys/kernel/debug/bluetooth': No such file or directory
  #

  # modprobe bluetooth
  modprobe: ERROR: could not insert 'bluetooth': Invalid argument
  # dmesg | tail -n 6
  Bluetooth: Core ver 2.22
  NET: Registered PF_BLUETOOTH protocol family
  Bluetooth: HCI device and connection manager initialized
  Bluetooth: HCI socket layer initialized
  Bluetooth: Faking l2cap_init() failure for testing
  NET: Unregistered PF_BLUETOOTH protocol family
  # ls -laF /sys/kernel/debug/bluetooth
  total 0
  drwxr-xr-x  2 root root 0 Sep 27 14:31 ./
  drwx------ 31 root root 0 Sep 27 14:26 ../
  #

  # modprobe bluetooth
  # dmesg | tail -n 7
  Bluetooth: Core ver 2.22
  debugfs: Directory 'bluetooth' with parent '/' already present!
  NET: Registered PF_BLUETOOTH protocol family
  Bluetooth: HCI device and connection manager initialized
  Bluetooth: HCI socket layer initialized
  Bluetooth: L2CAP socket layer initialized
  Bluetooth: SCO socket layer initialized
  # ls -laF /sys/kernel/debug/bluetooth
  total 0
  drwxr-xr-x  2 root root 0 Sep 27 14:31 ./
  drwx------ 31 root root 0 Sep 27 14:26 ../
  #

Cc: stable@vger.kernel.org
Fixes: ffcecac6a738 ("Bluetooth: Create root debugfs directory during module init")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/bluetooth/af_bluetooth.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -825,6 +825,7 @@ cleanup_sysfs:
 	bt_sysfs_cleanup();
 cleanup_led:
 	bt_leds_cleanup();
+	debugfs_remove_recursive(bt_debugfs);
 	return err;
 }
 

[PATCH 6.6 089/124] Bluetooth: ISO: Fix multiple init when debugfs is disabled

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Aaron Thompson <dev@aaront.org>

commit a9b7b535ba192c6b77e6c15a4c82d853163eab8c upstream.

If bt_debugfs is not created successfully, which happens if either
CONFIG_DEBUG_FS or CONFIG_DEBUG_FS_ALLOW_ALL is unset, then iso_init()
returns early and does not set iso_inited to true. This means that a
subsequent call to iso_init() will result in duplicate calls to
proto_register(), bt_sock_register(), etc.

With CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, the
duplicate call to proto_register() triggers this BUG():

  list_add double add: new=ffffffffc0b280d0, prev=ffffffffbab56250,
    next=ffffffffc0b280d0.
  ------------[ cut here ]------------
  kernel BUG at lib/list_debug.c:35!
  Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI
  CPU: 2 PID: 887 Comm: bluetoothd Not tainted 6.10.11-1-ao-desktop #1
  RIP: 0010:__list_add_valid_or_report+0x9a/0xa0
  ...
    __list_add_valid_or_report+0x9a/0xa0
    proto_register+0x2b5/0x340
    iso_init+0x23/0x150 [bluetooth]
    set_iso_socket_func+0x68/0x1b0 [bluetooth]
    kmem_cache_free+0x308/0x330
    hci_sock_sendmsg+0x990/0x9e0 [bluetooth]
    __sock_sendmsg+0x7b/0x80
    sock_write_iter+0x9a/0x110
    do_iter_readv_writev+0x11d/0x220
    vfs_writev+0x180/0x3e0
    do_writev+0xca/0x100
  ...

This change removes the early return. The check for iso_debugfs being
NULL was unnecessary, it is always NULL when iso_inited is false.

Cc: stable@vger.kernel.org
Fixes: ccf74f2390d6 ("Bluetooth: Add BTPROTO_ISO socket type")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/bluetooth/iso.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -2112,13 +2112,9 @@ int iso_init(void)
 
 	hci_register_cb(&iso_cb);
 
-	if (IS_ERR_OR_NULL(bt_debugfs))
-		return 0;
-
-	if (!iso_debugfs) {
+	if (!IS_ERR_OR_NULL(bt_debugfs))
 		iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs,
 						  NULL, &iso_debugfs_fops);
-	}
 
 	iso_inited = true;
 

[PATCH 6.6 090/124] Bluetooth: btusb: Fix regression with fake CSR controllers 0a12:0001

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

commit 2c1dda2acc4192d826e84008d963b528e24d12bc upstream.

Fake CSR controllers don't seem to handle short-transfer properly which
cause command to time out:

kernel: usb 1-1: new full-speed USB device number 19 using xhci_hcd
kernel: usb 1-1: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=88.91
kernel: usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
kernel: usb 1-1: Product: BT DONGLE10
...
Bluetooth: hci1: Opcode 0x1004 failed: -110
kernel: Bluetooth: hci1: command 0x1004 tx timeout

According to USB Spec 2.0 Section 5.7.3 Interrupt Transfer Packet Size
Constraints a interrupt transfer is considered complete when the size is 0
(ZPL) or < wMaxPacketSize:

 'When an interrupt transfer involves more data than can fit in one
 data payload of the currently established maximum size, all data
 payloads are required to be maximum-sized except for the last data
 payload, which will contain the remaining data. An interrupt transfer
 is complete when the endpoint does one of the following:

 • Has transferred exactly the amount of data expected
 • Transfers a packet with a payload size less than wMaxPacketSize or
 transfers a zero-length packet'

Link: https://bugzilla.kernel.org/show_bug.cgi?id=219365
Fixes: 7b05933340f4 ("Bluetooth: btusb: Fix not handling ZPL/short-transfer")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bluetooth/btusb.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -1354,10 +1354,15 @@ static int btusb_submit_intr_urb(struct
 	if (!urb)
 		return -ENOMEM;
 
-	/* Use maximum HCI Event size so the USB stack handles
-	 * ZPL/short-transfer automatically.
-	 */
-	size = HCI_MAX_EVENT_SIZE;
+	if (le16_to_cpu(data->udev->descriptor.idVendor)  == 0x0a12 &&
+	    le16_to_cpu(data->udev->descriptor.idProduct) == 0x0001)
+		/* Fake CSR devices don't seem to support sort-transter */
+		size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
+	else
+		/* Use maximum HCI Event size so the USB stack handles
+		 * ZPL/short-transfer automatically.
+		 */
+		size = HCI_MAX_EVENT_SIZE;
 
 	buf = kmalloc(size, mem_flags);
 	if (!buf) {

[PATCH 6.6 091/124] vt: prevent kernel-infoleak in con_font_get()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jeongjun Park <aha310510@gmail.com>

commit f956052e00de211b5c9ebaa1958366c23f82ee9e upstream.

font.data may not initialize all memory spaces depending on the implementation
of vc->vc_sw->con_font_get. This may cause info-leak, so to prevent this, it
is safest to modify it to initialize the allocated memory space to 0, and it
generally does not affect the overall performance of the system.

Cc: stable@vger.kernel.org
Reported-by: syzbot+955da2d57931604ee691@syzkaller.appspotmail.com
Fixes: 05e2600cb0a4 ("VT: Bump font size limitation to 64x128 pixels")
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
Link: https://lore.kernel.org/r/20241010174619.59662-1-aha310510@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/vt/vt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4550,7 +4550,7 @@ static int con_font_get(struct vc_data *
 		return -EINVAL;
 
 	if (op->data) {
-		font.data = kvmalloc(max_font_size, GFP_KERNEL);
+		font.data = kvzalloc(max_font_size, GFP_KERNEL);
 		if (!font.data)
 			return -ENOMEM;
 	} else

[PATCH 6.6 092/124] xhci: tegra: fix checked USB2 port number

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Henry Lin <henryl@nvidia.com>

commit 7d381137cb6ecf558ef6698c7730ddd482d4c8f2 upstream.

If USB virtualizatoin is enabled, USB2 ports are shared between all
Virtual Functions. The USB2 port number owned by an USB2 root hub in
a Virtual Function may be less than total USB2 phy number supported
by the Tegra XUSB controller.

Using total USB2 phy number as port number to check all PORTSC values
would cause invalid memory access.

[  116.923438] Unable to handle kernel paging request at virtual address 006c622f7665642f
...
[  117.213640] Call trace:
[  117.216783]  tegra_xusb_enter_elpg+0x23c/0x658
[  117.222021]  tegra_xusb_runtime_suspend+0x40/0x68
[  117.227260]  pm_generic_runtime_suspend+0x30/0x50
[  117.232847]  __rpm_callback+0x84/0x3c0
[  117.237038]  rpm_suspend+0x2dc/0x740
[  117.241229] pm_runtime_work+0xa0/0xb8
[  117.245769]  process_scheduled_works+0x24c/0x478
[  117.251007]  worker_thread+0x23c/0x328
[  117.255547]  kthread+0x104/0x1b0
[  117.259389]  ret_from_fork+0x10/0x20
[  117.263582] Code: 54000222 f9461ae8 f8747908 b4ffff48 (f9400100)

Cc: stable@vger.kernel.org # v6.3+
Fixes: a30951d31b25 ("xhci: tegra: USB2 pad power controls")
Signed-off-by: Henry Lin <henryl@nvidia.com>
Link: https://lore.kernel.org/r/20241014042134.27664-1-henryl@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-tegra.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -2183,7 +2183,7 @@ static int tegra_xusb_enter_elpg(struct
 		goto out;
 	}
 
-	for (i = 0; i < tegra->num_usb_phys; i++) {
+	for (i = 0; i < xhci->usb2_rhub.num_ports; i++) {
 		if (!xhci->usb2_rhub.ports[i])
 			continue;
 		portsc = readl(xhci->usb2_rhub.ports[i]->addr);

[PATCH 6.6 093/124] xhci: Fix incorrect stream context type macro

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mathias Nyman <mathias.nyman@linux.intel.com>

commit 6599b6a6fa8060145046d0744456b6abdb3122a7 upstream.

The stream contex type (SCT) bitfield is used both in the stream context
data structure,  and in the 'Set TR Dequeue pointer' command TRB.
In both cases it uses bits 3:1

The SCT_FOR_TRB(p) macro used to set the stream context type (SCT) field
for the 'Set TR Dequeue pointer' command TRB incorrectly shifts the value
1 bit left before masking the three bits.

Fix this by first masking and rshifting, just like the similar
SCT_FOR_CTX(p) macro does

This issue has not been visibile as the lost bit 3 is only used with
secondary stream arrays (SSA). Xhci driver currently only supports using
a primary stream array with Linear stream addressing.

Fixes: 95241dbdf828 ("xhci: Set SCT field for Set TR dequeue on streams")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241016140000.783905-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1286,7 +1286,7 @@ enum xhci_setup_dev {
 /* Set TR Dequeue Pointer command TRB fields, 6.4.3.9 */
 #define TRB_TO_STREAM_ID(p)		((((p) & (0xffff << 16)) >> 16))
 #define STREAM_ID_FOR_TRB(p)		((((p)) & 0xffff) << 16)
-#define SCT_FOR_TRB(p)			(((p) << 1) & 0x7)
+#define SCT_FOR_TRB(p)			(((p) & 0x7) << 1)
 
 /* Link TRB specific fields */
 #define TRB_TC			(1<<1)

[PATCH 6.6 094/124] xhci: Mitigate failed set dequeue pointer commands

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mathias Nyman <mathias.nyman@linux.intel.com>

commit fe49df60cdb7c2975aa743dc295f8786e4b7db10 upstream.

Avoid xHC host from processing a cancelled URB by always turning
cancelled URB TDs into no-op TRBs before queuing a 'Set TR Deq' command.

If the command fails then xHC will start processing the cancelled TD
instead of skipping it once endpoint is restarted, causing issues like
Babble error.

This is not a complete solution as a failed 'Set TR Deq' command does not
guarantee xHC TRB caches are cleared.

Fixes: 4db356924a50 ("xhci: turn cancelled td cleanup to its own function")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241016140000.783905-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-ring.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1046,7 +1046,7 @@ static int xhci_invalidate_cancelled_tds
 					td_to_noop(xhci, ring, cached_td, false);
 					cached_td->cancel_status = TD_CLEARED;
 				}
-
+				td_to_noop(xhci, ring, td, false);
 				td->cancel_status = TD_CLEARING_CACHE;
 				cached_td = td;
 				break;

[PATCH 6.6 095/124] USB: serial: option: add support for Quectel EG916Q-GL

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin B. Frost <benjamin@geanix.com>

commit 540eff5d7faf0c9330ec762da49df453263f7676 upstream.

Add Quectel EM916Q-GL with product ID 0x6007

T:  Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  3 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c7c ProdID=6007 Rev= 2.00
S:  Manufacturer=Quectel
S:  Product=EG916Q-GL
C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=200mA
A:  FirstIf#= 4 IfCount= 2 Cls=02(comm.) Sub=06 Prot=00
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=82(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=86(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether
E:  Ad=88(I) Atr=03(Int.) MxPS=  32 Ivl=32ms
I:  If#= 5 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I:* If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=89(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

MI_00 Quectel USB Diag Port
MI_01 Quectel USB NMEA Port
MI_02 Quectel USB AT Port
MI_03 Quectel USB Modem Port
MI_04 Quectel USB Net Port

Signed-off-by: Benjamin B. Frost <benjamin@geanix.com>
Reviewed-by: Lars Melin <larsm17@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/serial/option.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -279,6 +279,7 @@ static void option_instat_callback(struc
 #define QUECTEL_PRODUCT_EG912Y			0x6001
 #define QUECTEL_PRODUCT_EC200S_CN		0x6002
 #define QUECTEL_PRODUCT_EC200A			0x6005
+#define QUECTEL_PRODUCT_EG916Q			0x6007
 #define QUECTEL_PRODUCT_EM061K_LWW		0x6008
 #define QUECTEL_PRODUCT_EM061K_LCN		0x6009
 #define QUECTEL_PRODUCT_EC200T			0x6026
@@ -1270,6 +1271,7 @@ static const struct usb_device_id option
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200S_CN, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200T, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EG912Y, 0xff, 0, 0) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EG916Q, 0xff, 0x00, 0x00) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500K, 0xff, 0x00, 0x00) },
 
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },

[PATCH 6.6 096/124] USB: serial: option: add Telit FN920C04 MBIM compositions

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniele Palmas <dnlplm@gmail.com>

commit 6d951576ee16430822a8dee1e5c54d160e1de87d upstream.

Add the following Telit FN920C04 compositions:

0x10a2: MBIM + tty (AT/NMEA) + tty (AT) + tty (diag)
T:  Bus=03 Lev=01 Prnt=03 Port=06 Cnt=01 Dev#= 17 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1bc7 ProdID=10a2 Rev=05.15
S:  Manufacturer=Telit Cinterion
S:  Product=FN920
S:  SerialNumber=92c4c4d8
C:  #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=32ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=60 Driver=option
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=84(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=86(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
I:  If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

0x10a7: MBIM + tty (AT) + tty (AT) + tty (diag)
T:  Bus=03 Lev=01 Prnt=03 Port=06 Cnt=01 Dev#= 18 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1bc7 ProdID=10a7 Rev=05.15
S:  Manufacturer=Telit Cinterion
S:  Product=FN920
S:  SerialNumber=92c4c4d8
C:  #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=32ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=84(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=86(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
I:  If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

0x10aa: MBIM + tty (AT) + tty (diag) + DPL (data packet logging) + adb
T:  Bus=03 Lev=01 Prnt=03 Port=06 Cnt=01 Dev#= 15 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1bc7 ProdID=10aa Rev=05.15
S:  Manufacturer=Telit Cinterion
S:  Product=FN920
S:  SerialNumber=92c4c4d8
C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=32ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=84(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
I:  If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 4 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=80 Driver=(none)
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/serial/option.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1382,10 +1382,16 @@ static const struct usb_device_id option
 	  .driver_info = NCTRL(0) | RSVD(1) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10a0, 0xff),	/* Telit FN20C04 (rmnet) */
 	  .driver_info = RSVD(0) | NCTRL(3) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10a2, 0xff),	/* Telit FN920C04 (MBIM) */
+	  .driver_info = NCTRL(4) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10a4, 0xff),	/* Telit FN20C04 (rmnet) */
 	  .driver_info = RSVD(0) | NCTRL(3) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10a7, 0xff),	/* Telit FN920C04 (MBIM) */
+	  .driver_info = NCTRL(4) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10a9, 0xff),	/* Telit FN20C04 (rmnet) */
 	  .driver_info = RSVD(0) | NCTRL(2) | RSVD(3) | RSVD(4) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x10aa, 0xff),	/* Telit FN920C04 (MBIM) */
+	  .driver_info = NCTRL(3) | RSVD(4) | RSVD(5) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910_DUAL_MODEM),

[PATCH 6.6 097/124] usb: typec: qcom-pmic-typec: fix sink status being overwritten with RP_DEF

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jonathan Marek <jonathan@marek.ca>

commit ffe85c24d7ca5de7d57690c0ab194b3838674935 upstream.

This line is overwriting the result of the above switch-case.

This fixes the tcpm driver getting stuck in a "Sink TX No Go" loop.

Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Acked-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20241005144146.2345-1-jonathan@marek.ca
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c
+++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c
@@ -252,7 +252,6 @@ int qcom_pmic_typec_port_get_cc(struct p
 			val = TYPEC_CC_RP_DEF;
 			break;
 		}
-		val = TYPEC_CC_RP_DEF;
 	}
 
 	if (misc & CC_ORIENTATION)

[PATCH 6.6 098/124] usb: dwc3: Wait for EndXfer completion before restoring GUSB2PHYCFG

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Prashanth K <quic_prashk@quicinc.com>

commit c96e31252110a84dcc44412e8a7b456b33c3e298 upstream.

DWC3 programming guide mentions that when operating in USB2.0 speeds,
if GUSB2PHYCFG[6] or GUSB2PHYCFG[8] is set, it must be cleared prior
to issuing commands and may be set again  after the command completes.
But currently while issuing EndXfer command without CmdIOC set, we
wait for 1ms after GUSB2PHYCFG is restored. This results in cases
where EndXfer command doesn't get completed and causes SMMU faults
since requests are unmapped afterwards. Hence restore GUSB2PHYCFG
after waiting for EndXfer command completion.

Cc: stable@vger.kernel.org
Fixes: 1d26ba0944d3 ("usb: dwc3: Wait unconditionally after issuing EndXfer command")
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20240924093208.2524531-1-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/gadget.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -438,6 +438,10 @@ skip_status:
 			dwc3_gadget_ep_get_transfer_index(dep);
 	}
 
+	if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_ENDTRANSFER &&
+	    !(cmd & DWC3_DEPCMD_CMDIOC))
+		mdelay(1);
+
 	if (saved_config) {
 		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
 		reg |= saved_config;
@@ -1734,12 +1738,10 @@ static int __dwc3_stop_active_transfer(s
 	WARN_ON_ONCE(ret);
 	dep->resource_index = 0;
 
-	if (!interrupt) {
-		mdelay(1);
+	if (!interrupt)
 		dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
-	} else if (!ret) {
+	else if (!ret)
 		dep->flags |= DWC3_EP_END_TRANSFER_PENDING;
-	}
 
 	dep->flags &= ~DWC3_EP_DELAY_STOP;
 	return ret;

[PATCH 6.6 099/124] misc: microchip: pci1xxxx: add support for NVMEM_DEVID_AUTO for EEPROM device

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heiko Thiery <heiko.thiery@gmail.com>

commit 3c2d73de49be528276474c1a53f78b38ee11c1fa upstream.

By using NVMEM_DEVID_AUTO we support more than 1 device and
automatically enumerate.

Fixes: 9ab5465349c0 ("misc: microchip: pci1xxxx: Add support to read and write into PCI1XXXX EEPROM via NVMEM sysfs")
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20241007071120.9522-1-heiko.thiery@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
index 7c3d8bedf90b..d1cd4544c83c 100644
--- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
@@ -364,6 +364,7 @@ static int pci1xxxx_otp_eeprom_probe(struct auxiliary_device *aux_dev,
 	if (is_eeprom_responsive(priv)) {
 		priv->nvmem_config_eeprom.type = NVMEM_TYPE_EEPROM;
 		priv->nvmem_config_eeprom.name = EEPROM_NAME;
+		priv->nvmem_config_eeprom.id = NVMEM_DEVID_AUTO;
 		priv->nvmem_config_eeprom.dev = &aux_dev->dev;
 		priv->nvmem_config_eeprom.owner = THIS_MODULE;
 		priv->nvmem_config_eeprom.reg_read = pci1xxxx_eeprom_read;
-- 
2.47.0

[PATCH 6.6 100/124] misc: microchip: pci1xxxx: add support for NVMEM_DEVID_AUTO for OTP device

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heiko Thiery <heiko.thiery@gmail.com>

commit 2471787c1f0dae6721f60ab44be37460635d3732 upstream.

By using NVMEM_DEVID_AUTO we support more than 1 device and
automatically enumerate.

Fixes: 0969001569e4 ("misc: microchip: pci1xxxx: Add support to read and write into PCI1XXXX OTP via NVMEM sysfs")
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20241007071120.9522-2-heiko.thiery@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
index d1cd4544c83c..a2ed477e0370 100644
--- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_otpe2p.c
@@ -384,6 +384,7 @@ static int pci1xxxx_otp_eeprom_probe(struct auxiliary_device *aux_dev,
 
 	priv->nvmem_config_otp.type = NVMEM_TYPE_OTP;
 	priv->nvmem_config_otp.name = OTP_NAME;
+	priv->nvmem_config_otp.id = NVMEM_DEVID_AUTO;
 	priv->nvmem_config_otp.dev = &aux_dev->dev;
 	priv->nvmem_config_otp.owner = THIS_MODULE;
 	priv->nvmem_config_otp.reg_read = pci1xxxx_otp_read;
-- 
2.47.0

[PATCH 6.6 101/124] serial: imx: Update mctrl old_status on RTSD interrupt

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marek Vasut <marex@denx.de>

commit 40d7903386df4d18f04d90510ba90eedee260085 upstream.

When sending data using DMA at high baudrate (4 Mbdps in local test case) to
a device with small RX buffer which keeps asserting RTS after every received
byte, it is possible that the iMX UART driver would not recognize the falling
edge of RTS input signal and get stuck, unable to transmit any more data.

This condition happens when the following sequence of events occur:
- imx_uart_mctrl_check() is called at some point and takes a snapshot of UART
  control signal status into sport->old_status using imx_uart_get_hwmctrl().
  The RTSS/TIOCM_CTS bit is of interest here (*).
- DMA transfer occurs, the remote device asserts RTS signal after each byte.
  The i.MX UART driver recognizes each such RTS signal change, raises an
  interrupt with USR1 register RTSD bit set, which leads to invocation of
  __imx_uart_rtsint(), which calls uart_handle_cts_change().
  - If the RTS signal is deasserted, uart_handle_cts_change() clears
    port->hw_stopped and unblocks the port for further data transfers.
  - If the RTS is asserted, uart_handle_cts_change() sets port->hw_stopped
    and blocks the port for further data transfers. This may occur as the
    last interrupt of a transfer, which means port->hw_stopped remains set
    and the port remains blocked (**).
- Any further data transfer attempts will trigger imx_uart_mctrl_check(),
  which will read current status of UART control signals by calling
  imx_uart_get_hwmctrl() (***) and compare it with sport->old_status .
  - If current status differs from sport->old_status for RTS signal,
    uart_handle_cts_change() is called and possibly unblocks the port
    by clearing port->hw_stopped .
  - If current status does not differ from sport->old_status for RTS
    signal, no action occurs. This may occur in case prior snapshot (*)
    was taken before any transfer so the RTS is deasserted, current
    snapshot (***) was taken after a transfer and therefore RTS is
    deasserted again, which means current status and sport->old_status
    are identical. In case (**) triggered when RTS got asserted, and
    made port->hw_stopped set, the port->hw_stopped will remain set
    because no change on RTS line is recognized by this driver and
    uart_handle_cts_change() is not called from here to unblock the
    port->hw_stopped.

Update sport->old_status in __imx_uart_rtsint() accordingly to make
imx_uart_mctrl_check() detect such RTS change. Note that TIOCM_CAR
and TIOCM_RI bits in sport->old_status do not suffer from this problem.

Fixes: ceca629e0b48 ("[ARM] 2971/1: i.MX uart handle rts irq")
Cc: stable <stable@kernel.org>
Reviewed-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20241002184133.19427-1-marex@denx.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/imx.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -771,6 +771,21 @@ static irqreturn_t __imx_uart_rtsint(int
 
 	imx_uart_writel(sport, USR1_RTSD, USR1);
 	usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS;
+	/*
+	 * Update sport->old_status here, so any follow-up calls to
+	 * imx_uart_mctrl_check() will be able to recognize that RTS
+	 * state changed since last imx_uart_mctrl_check() call.
+	 *
+	 * In case RTS has been detected as asserted here and later on
+	 * deasserted by the time imx_uart_mctrl_check() was called,
+	 * imx_uart_mctrl_check() can detect the RTS state change and
+	 * trigger uart_handle_cts_change() to unblock the port for
+	 * further TX transfers.
+	 */
+	if (usr1 & USR1_RTSS)
+		sport->old_status |= TIOCM_CTS;
+	else
+		sport->old_status &= ~TIOCM_CTS;
 	uart_handle_cts_change(&sport->port, usr1);
 	wake_up_interruptible(&sport->port.state->port.delta_msr_wait);
 

[PATCH 6.6 102/124] parport: Proper fix for array out-of-bounds access

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@suse.de>

commit 02ac3a9ef3a18b58d8f3ea2b6e46de657bf6c4f9 upstream.

The recent fix for array out-of-bounds accesses replaced sprintf()
calls blindly with snprintf().  However, since snprintf() returns the
would-be-printed size, not the actually output size, the length
calculation can still go over the given limit.

Use scnprintf() instead of snprintf(), which returns the actually
output letters, for addressing the potential out-of-bounds access
properly.

Fixes: ab11dac93d2d ("dev/parport: fix the array out-of-bounds risk")
Cc: stable@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240920103318.19271-1-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/parport/procfs.c |   22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

--- a/drivers/parport/procfs.c
+++ b/drivers/parport/procfs.c
@@ -58,12 +58,12 @@ static int do_active_device(struct ctl_t
 	
 	for (dev = port->devices; dev ; dev = dev->next) {
 		if(dev == port->cad) {
-			len += snprintf(buffer, sizeof(buffer), "%s\n", dev->name);
+			len += scnprintf(buffer, sizeof(buffer), "%s\n", dev->name);
 		}
 	}
 
 	if(!len) {
-		len += snprintf(buffer, sizeof(buffer), "%s\n", "none");
+		len += scnprintf(buffer, sizeof(buffer), "%s\n", "none");
 	}
 
 	if (len > *lenp)
@@ -94,19 +94,19 @@ static int do_autoprobe(struct ctl_table
 	}
 	
 	if ((str = info->class_name) != NULL)
-		len += snprintf (buffer + len, sizeof(buffer) - len, "CLASS:%s;\n", str);
+		len += scnprintf (buffer + len, sizeof(buffer) - len, "CLASS:%s;\n", str);
 
 	if ((str = info->model) != NULL)
-		len += snprintf (buffer + len, sizeof(buffer) - len, "MODEL:%s;\n", str);
+		len += scnprintf (buffer + len, sizeof(buffer) - len, "MODEL:%s;\n", str);
 
 	if ((str = info->mfr) != NULL)
-		len += snprintf (buffer + len, sizeof(buffer) - len, "MANUFACTURER:%s;\n", str);
+		len += scnprintf (buffer + len, sizeof(buffer) - len, "MANUFACTURER:%s;\n", str);
 
 	if ((str = info->description) != NULL)
-		len += snprintf (buffer + len, sizeof(buffer) - len, "DESCRIPTION:%s;\n", str);
+		len += scnprintf (buffer + len, sizeof(buffer) - len, "DESCRIPTION:%s;\n", str);
 
 	if ((str = info->cmdset) != NULL)
-		len += snprintf (buffer + len, sizeof(buffer) - len, "COMMAND SET:%s;\n", str);
+		len += scnprintf (buffer + len, sizeof(buffer) - len, "COMMAND SET:%s;\n", str);
 
 	if (len > *lenp)
 		len = *lenp;
@@ -135,7 +135,7 @@ static int do_hardware_base_addr(struct
 	if (write) /* permissions prevent this anyway */
 		return -EACCES;
 
-	len += snprintf (buffer, sizeof(buffer), "%lu\t%lu\n", port->base, port->base_hi);
+	len += scnprintf (buffer, sizeof(buffer), "%lu\t%lu\n", port->base, port->base_hi);
 
 	if (len > *lenp)
 		len = *lenp;
@@ -162,7 +162,7 @@ static int do_hardware_irq(struct ctl_ta
 	if (write) /* permissions prevent this anyway */
 		return -EACCES;
 
-	len += snprintf (buffer, sizeof(buffer), "%d\n", port->irq);
+	len += scnprintf (buffer, sizeof(buffer), "%d\n", port->irq);
 
 	if (len > *lenp)
 		len = *lenp;
@@ -189,7 +189,7 @@ static int do_hardware_dma(struct ctl_ta
 	if (write) /* permissions prevent this anyway */
 		return -EACCES;
 
-	len += snprintf (buffer, sizeof(buffer), "%d\n", port->dma);
+	len += scnprintf (buffer, sizeof(buffer), "%d\n", port->dma);
 
 	if (len > *lenp)
 		len = *lenp;
@@ -220,7 +220,7 @@ static int do_hardware_modes(struct ctl_
 #define printmode(x)							\
 do {									\
 	if (port->modes & PARPORT_MODE_##x)				\
-		len += snprintf(buffer + len, sizeof(buffer) - len, "%s%s", f++ ? "," : "", #x); \
+		len += scnprintf(buffer + len, sizeof(buffer) - len, "%s%s", f++ ? "," : "", #x); \
 } while (0)
 		int f = 0;
 		printmode(PCSPP);

[PATCH 6.6 103/124] x86/resctrl: Annotate get_mem_config() functions as __init

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nathan Chancellor <nathan@kernel.org>

commit d5fd042bf4cfb557981d65628e1779a492cd8cfa upstream.

After a recent LLVM change [1] that deduces __cold on functions that only call
cold code (such as __init functions), there is a section mismatch warning from
__get_mem_config_intel(), which got moved to .text.unlikely. as a result of
that optimization:

  WARNING: modpost: vmlinux: section mismatch in reference: \
  __get_mem_config_intel+0x77 (section: .text.unlikely.) -> thread_throttle_mode_init (section: .init.text)

Mark __get_mem_config_intel() as __init as well since it is only called
from __init code, which clears up the warning.

While __rdt_get_mem_config_amd() does not exhibit a warning because it
does not call any __init code, it is a similar function that is only
called from __init code like __get_mem_config_intel(), so mark it __init
as well to keep the code symmetrical.

CONFIG_SECTION_MISMATCH_WARN_ONLY=n would turn this into a fatal error.

Fixes: 05b93417ce5b ("x86/intel_rdt/mba: Add primary support for Memory Bandwidth Allocation (MBA)")
Fixes: 4d05bf71f157 ("x86/resctrl: Introduce AMD QOS feature")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: <stable@kernel.org>
Link: https://github.com/llvm/llvm-project/commit/6b11573b8c5e3d36beee099dbe7347c2a007bf53 [1]
Link: https://lore.kernel.org/r/20240917-x86-restctrl-get_mem_config_intel-init-v3-1-10d521256284@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/cpu/resctrl/core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -193,7 +193,7 @@ static inline bool rdt_get_mb_table(stru
 	return false;
 }
 
-static bool __get_mem_config_intel(struct rdt_resource *r)
+static __init bool __get_mem_config_intel(struct rdt_resource *r)
 {
 	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
 	union cpuid_0x10_3_eax eax;
@@ -227,7 +227,7 @@ static bool __get_mem_config_intel(struc
 	return true;
 }
 
-static bool __rdt_get_mem_config_amd(struct rdt_resource *r)
+static __init bool __rdt_get_mem_config_amd(struct rdt_resource *r)
 {
 	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
 	u32 eax, ebx, ecx, edx, subleaf;

[PATCH 6.6 104/124] x86/apic: Always explicitly disarm TSC-deadline timer

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Rui <rui.zhang@intel.com>

commit ffd95846c6ec6cf1f93da411ea10d504036cab42 upstream.

New processors have become pickier about the local APIC timer state
before entering low power modes. These low power modes are used (for
example) when you close your laptop lid and suspend. If you put your
laptop in a bag and it is not in this low power mode, it is likely
to get quite toasty while it quickly sucks the battery dry.

The problem boils down to some CPUs' inability to power down until the
CPU recognizes that the local APIC timer is shut down. The current
kernel code works in one-shot and periodic modes but does not work for
deadline mode. Deadline mode has been the supported and preferred mode
on Intel CPUs for over a decade and uses an MSR to drive the timer
instead of an APIC register.

Disable the TSC Deadline timer in lapic_timer_shutdown() by writing to
MSR_IA32_TSC_DEADLINE when in TSC-deadline mode. Also avoid writing
to the initial-count register (APIC_TMICT) which is ignored in
TSC-deadline mode.

Note: The APIC_LVTT|=APIC_LVT_MASKED operation should theoretically be
enough to tell the hardware that the timer will not fire in any of the
timer modes. But mitigating AMD erratum 411[1] also requires clearing
out APIC_TMICT. Solely setting APIC_LVT_MASKED is also ineffective in
practice on Intel Lunar Lake systems, which is the motivation for this
change.

1. 411 Processor May Exit Message-Triggered C1E State Without an Interrupt if Local APIC Timer Reaches Zero - https://www.amd.com/content/dam/amd/en/documents/archived-tech-docs/revision-guides/41322_10h_Rev_Gd.pdf

Fixes: 279f1461432c ("x86: apic: Use tsc deadline for oneshot when available")
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: Todd Brandt <todd.e.brandt@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20241015061522.25288-1-rui.zhang%40intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/apic/apic.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -473,7 +473,19 @@ static int lapic_timer_shutdown(struct c
 	v = apic_read(APIC_LVTT);
 	v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
 	apic_write(APIC_LVTT, v);
-	apic_write(APIC_TMICT, 0);
+
+	/*
+	 * Setting APIC_LVT_MASKED (above) should be enough to tell
+	 * the hardware that this timer will never fire. But AMD
+	 * erratum 411 and some Intel CPU behavior circa 2024 say
+	 * otherwise.  Time for belt and suspenders programming: mask
+	 * the timer _and_ zero the counter registers:
+	 */
+	if (v & APIC_LVT_TIMER_TSCDEADLINE)
+		wrmsrl(MSR_IA32_TSC_DEADLINE, 0);
+	else
+		apic_write(APIC_TMICT, 0);
+
 	return 0;
 }
 

[PATCH 6.6 105/124] x86/CPU/AMD: Only apply Zenbleed fix for Zen2 during late microcode load

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Allen <john.allen@amd.com>

commit ee4d4e8d2c3bec6ee652599ab31991055a72c322 upstream.

Commit

  f69759be251d ("x86/CPU/AMD: Move Zenbleed check to the Zen2 init function")

causes a bit in the DE_CFG MSR to get set erroneously after a microcode late
load.

The microcode late load path calls into amd_check_microcode() and subsequently
zen2_zenbleed_check(). Since the above commit removes the cpu_has_amd_erratum()
call from zen2_zenbleed_check(), this will cause all non-Zen2 CPUs to go
through the function and set the bit in the DE_CFG MSR.

Call into the Zenbleed fix path on Zen2 CPUs only.

  [ bp: Massage commit message, use cpu_feature_enabled(). ]

Fixes: f69759be251d ("x86/CPU/AMD: Move Zenbleed check to the Zen2 init function")
Signed-off-by: John Allen <john.allen@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20240923164404.27227-1-john.allen@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/cpu/amd.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1374,7 +1374,8 @@ void amd_check_microcode(void)
 	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
 		return;
 
-	on_each_cpu(zenbleed_check_cpu, NULL, 1);
+	if (cpu_feature_enabled(X86_FEATURE_ZEN2))
+		on_each_cpu(zenbleed_check_cpu, NULL, 1);
 }
 
 /*

[PATCH 6.6 106/124] x86/entry_32: Do not clobber user EFLAGS.ZF

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

commit 2e2e5143d4868163d6756c8c6a4d28cbfa5245e5 upstream.

Opportunistic SYSEXIT executes VERW to clear CPU buffers after user EFLAGS
are restored. This can clobber user EFLAGS.ZF.

Move CLEAR_CPU_BUFFERS before the user EFLAGS are restored. This ensures
that the user EFLAGS.ZF is not clobbered.

Closes: https://lore.kernel.org/lkml/yVXwe8gvgmPADpRB6lXlicS2fcHoV5OHHxyuFbB_MEleRPD7-KhGe5VtORejtPe-KCkT8Uhcg5d7-IBw4Ojb4H7z5LQxoZylSmJ8KNL3A8o=@protonmail.com/
Fixes: a0e2dab44d22 ("x86/entry_32: Add VERW just before userspace transition")
Reported-by: Jari Ruusu <jariruusu@protonmail.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc:stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240925-fix-dosemu-vm86-v7-1-1de0daca2d42%40linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/entry/entry_32.S |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -875,6 +875,8 @@ SYM_FUNC_START(entry_SYSENTER_32)
 
 	/* Now ready to switch the cr3 */
 	SWITCH_TO_USER_CR3 scratch_reg=%eax
+	/* Clobbers ZF */
+	CLEAR_CPU_BUFFERS
 
 	/*
 	 * Restore all flags except IF. (We restore IF separately because
@@ -885,7 +887,6 @@ SYM_FUNC_START(entry_SYSENTER_32)
 	BUG_IF_WRONG_CR3 no_user_check=1
 	popfl
 	popl	%eax
-	CLEAR_CPU_BUFFERS
 
 	/*
 	 * Return back to the vDSO, which will pop ecx and edx.

[PATCH 6.6 107/124] x86/entry_32: Clear CPU buffers after register restore in NMI return

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

commit 48a2440d0f20c826b884e04377ccc1e4696c84e9 upstream.

CPU buffers are currently cleared after call to exc_nmi, but before
register state is restored. This may be okay for MDS mitigation but not for
RDFS. Because RDFS mitigation requires CPU buffers to be cleared when
registers don't have any sensitive data.

Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.

Fixes: a0e2dab44d22 ("x86/entry_32: Add VERW just before userspace transition")
Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc:stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240925-fix-dosemu-vm86-v7-2-1de0daca2d42%40linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/entry/entry_32.S |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1149,7 +1149,6 @@ SYM_CODE_START(asm_exc_nmi)
 
 	/* Not on SYSENTER stack. */
 	call	exc_nmi
-	CLEAR_CPU_BUFFERS
 	jmp	.Lnmi_return
 
 .Lnmi_from_sysenter_stack:
@@ -1170,6 +1169,7 @@ SYM_CODE_START(asm_exc_nmi)
 
 	CHECK_AND_APPLY_ESPFIX
 	RESTORE_ALL_NMI cr3_reg=%edi pop=4
+	CLEAR_CPU_BUFFERS
 	jmp	.Lirq_return
 
 #ifdef CONFIG_X86_ESPFIX32
@@ -1211,6 +1211,7 @@ SYM_CODE_START(asm_exc_nmi)
 	 *  1 - orig_ax
 	 */
 	lss	(1+5+6)*4(%esp), %esp			# back to espfix stack
+	CLEAR_CPU_BUFFERS
 	jmp	.Lirq_return
 #endif
 SYM_CODE_END(asm_exc_nmi)

[PATCH 6.6 108/124] tty: n_gsm: Fix use-after-free in gsm_cleanup_mux

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Longlong Xia <xialonglong@kylinos.cn>

commit 9462f4ca56e7d2430fdb6dcc8498244acbfc4489 upstream.

BUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0
drivers/tty/n_gsm.c:3160 [n_gsm]
Read of size 8 at addr ffff88815fe99c00 by task poc/3379
CPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56
Hardware name: VMware, Inc. VMware Virtual Platform/440BX
Desktop Reference Platform, BIOS 6.00 11/12/2020
Call Trace:
 <TASK>
 gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm]
 __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm]
 __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389
 update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500
 __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846
 __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161
 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm]
 _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107
 __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm]
 ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195
 ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79
 __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338
 __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805
 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818

Allocated by task 65:
 gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm]
 gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm]
 gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm]
 gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm]
 tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391
 tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39
 flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445
 process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229
 worker_thread+0x3dc/0x950 kernel/workqueue.c:3391
 kthread+0x2a3/0x370 kernel/kthread.c:389
 ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257

Freed by task 3367:
 kfree+0x126/0x420 mm/slub.c:4580
 gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm]
 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm]
 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818

[Analysis]
gsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux
can be freed by multi threads through ioctl,which leads
to the occurrence of uaf. Protect it by gsm tx lock.

Signed-off-by: Longlong Xia <xialonglong@kylinos.cn>
Cc: stable <stable@kernel.org>
Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20240926130213.531959-1-xialonglong@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/n_gsm.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3156,6 +3156,8 @@ static void gsm_cleanup_mux(struct gsm_m
 	mutex_unlock(&gsm->mutex);
 	/* Now wipe the queues */
 	tty_ldisc_flush(gsm->tty);
+
+	guard(spinlock_irqsave)(&gsm->tx_lock);
 	list_for_each_entry_safe(txq, ntxq, &gsm->tx_ctrl_list, list)
 		kfree(txq);
 	INIT_LIST_HEAD(&gsm->tx_ctrl_list);

[PATCH 6.6 109/124] x86/bugs: Use code segment selector for VERW operand

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

commit e4d2102018542e3ae5e297bc6e229303abff8a0f upstream.

Robert Gill reported below #GP in 32-bit mode when dosemu software was
executing vm86() system call:

  general protection fault: 0000 [#1] PREEMPT SMP
  CPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1
  Hardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010
  EIP: restore_all_switch_stack+0xbe/0xcf
  EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
  ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc
  DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046
  CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0
  Call Trace:
   show_regs+0x70/0x78
   die_addr+0x29/0x70
   exc_general_protection+0x13c/0x348
   exc_bounds+0x98/0x98
   handle_exception+0x14d/0x14d
   exc_bounds+0x98/0x98
   restore_all_switch_stack+0xbe/0xcf
   exc_bounds+0x98/0x98
   restore_all_switch_stack+0xbe/0xcf

This only happens in 32-bit mode when VERW based mitigations like MDS/RFDS
are enabled. This is because segment registers with an arbitrary user value
can result in #GP when executing VERW. Intel SDM vol. 2C documents the
following behavior for VERW instruction:

  #GP(0) - If a memory operand effective address is outside the CS, DS, ES,
	   FS, or GS segment limit.

CLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user
space. Use %cs selector to reference VERW operand. This ensures VERW will
not #GP for an arbitrary user %ds.

[ mingo: Fixed the SOB chain. ]

Fixes: a0e2dab44d22 ("x86/entry_32: Add VERW just before userspace transition")
Reported-by: Robert Gill <rtgill82@gmail.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com
Cc: stable@vger.kernel.org # 5.10+
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218707
Closes: https://lore.kernel.org/all/8c77ccfd-d561-45a1-8ed5-6b75212c7a58@leemhuis.info/
Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Suggested-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/include/asm/nospec-branch.h |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -332,7 +332,16 @@
  * Note: Only the memory operand variant of VERW clears the CPU buffers.
  */
 .macro CLEAR_CPU_BUFFERS
-	ALTERNATIVE "", __stringify(verw _ASM_RIP(mds_verw_sel)), X86_FEATURE_CLEAR_CPU_BUF
+#ifdef CONFIG_X86_64
+	ALTERNATIVE "", "verw mds_verw_sel(%rip)", X86_FEATURE_CLEAR_CPU_BUF
+#else
+	/*
+	 * In 32bit mode, the memory operand must be a %cs reference. The data
+	 * segments may not be usable (vm86 mode), and the stack segment may not
+	 * be flat (ESPFIX32).
+	 */
+	ALTERNATIVE "", "verw %cs:mds_verw_sel", X86_FEATURE_CLEAR_CPU_BUF
+#endif
 .endm
 
 #ifdef CONFIG_X86_64

[PATCH 6.6 110/124] pinctrl: ocelot: fix system hang on level based interrupts

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sergey Matsievskiy <matsievskiysv@gmail.com>

commit 93b8ddc54507a227087c60a0013ed833b6ae7d3c upstream.

The current implementation only calls chained_irq_enter() and
chained_irq_exit() if it detects pending interrupts.

```
for (i = 0; i < info->stride; i++) {
	uregmap_read(info->map, id_reg + 4 * i, &reg);
	if (!reg)
		continue;

	chained_irq_enter(parent_chip, desc);
```

However, in case of GPIO pin configured in level mode and the parent
controller configured in edge mode, GPIO interrupt might be lowered by the
hardware. In the result, if the interrupt is short enough, the parent
interrupt is still pending while the GPIO interrupt is cleared;
chained_irq_enter() never gets called and the system hangs trying to
service the parent interrupt.

Moving chained_irq_enter() and chained_irq_exit() outside the for loop
ensures that they are called even when GPIO interrupt is lowered by the
hardware.

The similar code with chained_irq_enter() / chained_irq_exit() functions
wrapping interrupt checking loop may be found in many other drivers:
```
grep -r -A 10 chained_irq_enter drivers/pinctrl
```

Cc: stable@vger.kernel.org
Signed-off-by: Sergey Matsievskiy <matsievskiysv@gmail.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/20241012105743.12450-2-matsievskiysv@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pinctrl/pinctrl-ocelot.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/pinctrl/pinctrl-ocelot.c
+++ b/drivers/pinctrl/pinctrl-ocelot.c
@@ -1962,21 +1962,21 @@ static void ocelot_irq_handler(struct ir
 	unsigned int reg = 0, irq, i;
 	unsigned long irqs;
 
+	chained_irq_enter(parent_chip, desc);
+
 	for (i = 0; i < info->stride; i++) {
 		regmap_read(info->map, id_reg + 4 * i, &reg);
 		if (!reg)
 			continue;
 
-		chained_irq_enter(parent_chip, desc);
-
 		irqs = reg;
 
 		for_each_set_bit(irq, &irqs,
 				 min(32U, info->desc->npins - 32 * i))
 			generic_handle_domain_irq(chip->irq.domain, irq + 32 * i);
-
-		chained_irq_exit(parent_chip, desc);
 	}
+
+	chained_irq_exit(parent_chip, desc);
 }
 
 static int ocelot_gpiochip_register(struct platform_device *pdev,

[PATCH 6.6 111/124] pinctrl: stm32: check devm_kasprintf() returned value

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ma Ke <make24@iscas.ac.cn>

commit b0f0e3f0552a566def55c844b0d44250c58e4df6 upstream.

devm_kasprintf() can return a NULL pointer on failure but this returned
value is not checked. Fix this lack and check the returned value.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: 32c170ff15b0 ("pinctrl: stm32: set default gpio line names using pin names")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://lore.kernel.org/20240906100326.624445-1-make24@iscas.ac.cn
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pinctrl/stm32/pinctrl-stm32.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -1387,10 +1387,15 @@ static int stm32_gpiolib_register_bank(s
 
 	for (i = 0; i < npins; i++) {
 		stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i);
-		if (stm32_pin && stm32_pin->pin.name)
+		if (stm32_pin && stm32_pin->pin.name) {
 			names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name);
-		else
+			if (!names[i]) {
+				err = -ENOMEM;
+				goto err_clk;
+			}
+		} else {
 			names[i] = NULL;
+		}
 	}
 
 	bank->gpio_chip.names = (const char * const *)names;

[PATCH 6.6 112/124] pinctrl: apple: check devm_kasprintf() returned value

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ma Ke <make24@iscas.ac.cn>

commit 665a58fe663ac7a9ea618dc0b29881649324b116 upstream.

devm_kasprintf() can return a NULL pointer on failure but this returned
value is not checked. Fix this lack and check the returned value.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: a0f160ffcb83 ("pinctrl: add pinctrl/GPIO driver for Apple SoCs")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Reviewed-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/20240905020917.356534-1-make24@iscas.ac.cn
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pinctrl/pinctrl-apple-gpio.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/pinctrl/pinctrl-apple-gpio.c
+++ b/drivers/pinctrl/pinctrl-apple-gpio.c
@@ -474,6 +474,9 @@ static int apple_gpio_pinctrl_probe(stru
 	for (i = 0; i < npins; i++) {
 		pins[i].number = i;
 		pins[i].name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "PIN%u", i);
+		if (!pins[i].name)
+			return -ENOMEM;
+
 		pins[i].drv_data = pctl;
 		pin_names[i] = pins[i].name;
 		pin_nums[i] = i;

[PATCH 6.6 113/124] irqchip/gic-v4: Dont allow a VMOVP on a dying VPE

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marc Zyngier <maz@kernel.org>

commit 1442ee0011983f0c5c4b92380e6853afb513841a upstream.

Kunkun Jiang reported that there is a small window of opportunity for
userspace to force a change of affinity for a VPE while the VPE has already
been unmapped, but the corresponding doorbell interrupt still visible in
/proc/irq/.

Plug the race by checking the value of vmapp_count, which tracks whether
the VPE is mapped ot not, and returning an error in this case.

This involves making vmapp_count common to both GICv4.1 and its v4.0
ancestor.

Fixes: 64edfaa9a234 ("irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP")
Reported-by: Kunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/c182ece6-2ba0-ce4f-3404-dba7a3ab6c52@huawei.com
Link: https://lore.kernel.org/all/20241002204959.2051709-1-maz@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-gic-v3-its.c   |   18 ++++++++++++------
 include/linux/irqchip/arm-gic-v4.h |    4 +++-
 2 files changed, 15 insertions(+), 7 deletions(-)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -796,8 +796,8 @@ static struct its_vpe *its_build_vmapp_c
 	its_encode_valid(cmd, desc->its_vmapp_cmd.valid);
 
 	if (!desc->its_vmapp_cmd.valid) {
+		alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count);
 		if (is_v4_1(its)) {
-			alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count);
 			its_encode_alloc(cmd, alloc);
 			/*
 			 * Unmapping a VPE is self-synchronizing on GICv4.1,
@@ -816,13 +816,13 @@ static struct its_vpe *its_build_vmapp_c
 	its_encode_vpt_addr(cmd, vpt_addr);
 	its_encode_vpt_size(cmd, LPI_NRBITS - 1);
 
+	alloc = !atomic_fetch_inc(&desc->its_vmapp_cmd.vpe->vmapp_count);
+
 	if (!is_v4_1(its))
 		goto out;
 
 	vconf_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->its_vm->vprop_page));
 
-	alloc = !atomic_fetch_inc(&desc->its_vmapp_cmd.vpe->vmapp_count);
-
 	its_encode_alloc(cmd, alloc);
 
 	/*
@@ -3817,6 +3817,13 @@ static int its_vpe_set_affinity(struct i
 	int from, cpu;
 
 	/*
+	 * Check if we're racing against a VPE being destroyed, for
+	 * which we don't want to allow a VMOVP.
+	 */
+	if (!atomic_read(&vpe->vmapp_count))
+		return -EINVAL;
+
+	/*
 	 * Changing affinity is mega expensive, so let's be as lazy as
 	 * we can and only do it if we really have to. Also, if mapped
 	 * into the proxy device, we need to move the doorbell
@@ -4456,9 +4463,8 @@ static int its_vpe_init(struct its_vpe *
 	raw_spin_lock_init(&vpe->vpe_lock);
 	vpe->vpe_id = vpe_id;
 	vpe->vpt_page = vpt_page;
-	if (gic_rdists->has_rvpeid)
-		atomic_set(&vpe->vmapp_count, 0);
-	else
+	atomic_set(&vpe->vmapp_count, 0);
+	if (!gic_rdists->has_rvpeid)
 		vpe->vpe_proxy_event = -1;
 
 	return 0;
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -58,10 +58,12 @@ struct its_vpe {
 				bool	enabled;
 				bool	group;
 			}			sgi_config[16];
-			atomic_t vmapp_count;
 		};
 	};
 
+	/* Track the VPE being mapped */
+	atomic_t vmapp_count;
+
 	/*
 	 * Ensures mutual exclusion between affinity setting of the
 	 * vPE and vLPI operations using vpe->col_idx.

[PATCH 6.6 114/124] irqchip/sifive-plic: Unmask interrupt in plic_irq_enable()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nam Cao <namcao@linutronix.de>

commit 6b1e0651e9ce8ce418ad4ff360e7b9925dc5da79 upstream.

It is possible that an interrupt is disabled and masked at the same time.
When the interrupt is enabled again by enable_irq(), only plic_irq_enable()
is called, not plic_irq_unmask(). The interrupt remains masked and never
raises.

An example where interrupt is both disabled and masked is when
handle_fasteoi_irq() is the handler, and IRQS_ONESHOT is set. The interrupt
handler:

  1. Mask the interrupt
  2. Handle the interrupt
  3. Check if interrupt is still enabled, and unmask it (see
     cond_unmask_eoi_irq())

If another task disables the interrupt in the middle of the above steps,
the interrupt will not get unmasked, and will remain masked when it is
enabled in the future.

The problem is occasionally observed when PREEMPT_RT is enabled, because
PREEMPT_RT adds the IRQS_ONESHOT flag. But PREEMPT_RT only makes the problem
more likely to appear, the bug has been around since commit a1706a1c5062
("irqchip/sifive-plic: Separate the enable and mask operations").

Fix it by unmasking interrupt in plic_irq_enable().

Fixes: a1706a1c5062 ("irqchip/sifive-plic: Separate the enable and mask operations")
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20241003084152.2422969-1-namcao@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-sifive-plic.c |   21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -120,16 +120,6 @@ static inline void plic_irq_toggle(const
 	}
 }
 
-static void plic_irq_enable(struct irq_data *d)
-{
-	plic_irq_toggle(irq_data_get_effective_affinity_mask(d), d, 1);
-}
-
-static void plic_irq_disable(struct irq_data *d)
-{
-	plic_irq_toggle(irq_data_get_effective_affinity_mask(d), d, 0);
-}
-
 static void plic_irq_unmask(struct irq_data *d)
 {
 	struct plic_priv *priv = irq_data_get_irq_chip_data(d);
@@ -144,6 +134,17 @@ static void plic_irq_mask(struct irq_dat
 	writel(0, priv->regs + PRIORITY_BASE + d->hwirq * PRIORITY_PER_ID);
 }
 
+static void plic_irq_enable(struct irq_data *d)
+{
+	plic_irq_toggle(irq_data_get_effective_affinity_mask(d), d, 1);
+	plic_irq_unmask(d);
+}
+
+static void plic_irq_disable(struct irq_data *d)
+{
+	plic_irq_toggle(irq_data_get_effective_affinity_mask(d), d, 0);
+}
+
 static void plic_irq_eoi(struct irq_data *d)
 {
 	struct plic_handler *handler = this_cpu_ptr(&plic_handlers);

[PATCH 6.6 115/124] serial: qcom-geni: fix polled console initialisation

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan+linaro@kernel.org>

commit 4bef7c6f299910f19876ad8e7f5897514855f1d2 upstream.

The polled console (KGDB/KDB) implementation must not call port setup
unconditionally as the port may already be in use by the console or a
getty.

Only make sure that the receiver is enabled, but do not enable any
device interrupts.

Fixes: d8851a96ba25 ("tty: serial: qcom-geni-serial: Add a poll_init() function")
Cc: stable@vger.kernel.org	# 6.4
Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20241009145110.16847-2-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c |   21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -144,6 +144,8 @@ static const struct uart_ops qcom_geni_u
 static struct uart_driver qcom_geni_console_driver;
 static struct uart_driver qcom_geni_uart_driver;
 
+static int qcom_geni_serial_port_setup(struct uart_port *uport);
+
 static inline struct qcom_geni_serial_port *to_dev_port(struct uart_port *uport)
 {
 	return container_of(uport, struct qcom_geni_serial_port, uport);
@@ -385,6 +387,23 @@ static void qcom_geni_serial_poll_put_ch
 	writel(M_TX_FIFO_WATERMARK_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
 	qcom_geni_serial_poll_tx_done(uport);
 }
+
+static int qcom_geni_serial_poll_init(struct uart_port *uport)
+{
+	struct qcom_geni_serial_port *port = to_dev_port(uport);
+	int ret;
+
+	if (!port->setup) {
+		ret = qcom_geni_serial_port_setup(uport);
+		if (ret)
+			return ret;
+	}
+
+	if (!qcom_geni_serial_secondary_active(uport))
+		geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
+
+	return 0;
+}
 #endif
 
 #ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE
@@ -1544,7 +1563,7 @@ static const struct uart_ops qcom_geni_c
 #ifdef CONFIG_CONSOLE_POLL
 	.poll_get_char	= qcom_geni_serial_get_char,
 	.poll_put_char	= qcom_geni_serial_poll_put_char,
-	.poll_init = qcom_geni_serial_port_setup,
+	.poll_init = qcom_geni_serial_poll_init,
 #endif
 	.pm = qcom_geni_serial_pm,
 };

[PATCH 6.6 116/124] serial: qcom-geni: revert broken hibernation support

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan+linaro@kernel.org>

commit 19df76662a33d2f2fc41a66607cb8285fc02d6ec upstream.

This reverts commit 35781d8356a2eecaa6074ceeb80ee22e252fcdae.

Hibernation is not supported on Qualcomm platforms with mainline
kernels yet a broken vendor implementation for the GENI serial driver
made it upstream.

This is effectively dead code that cannot be tested and should just be
removed, but if these paths were ever hit for an open non-console port
they would crash the machine as the driver would fail to enable clocks
during restore() (i.e. all ports would have to be closed by drivers and
user space before hibernating the system to avoid this as a comment in
the code hinted at).

The broken implementation also added a random call to enable the
receiver in the port setup code where it does not belong and which
enables the receiver prematurely for console ports.

Fixes: 35781d8356a2 ("tty: serial: qcom-geni-serial: Add support for Hibernation feature")
Cc: stable@vger.kernel.org	# 6.2
Cc: Aniket Randive <quic_arandive@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20241009145110.16847-3-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c |   41 +---------------------------------
 1 file changed, 2 insertions(+), 39 deletions(-)

--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1134,7 +1134,6 @@ static int qcom_geni_serial_port_setup(s
 			       false, true, true);
 	geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2);
 	geni_se_select_mode(&port->se, port->dev_data->mode);
-	qcom_geni_serial_start_rx(uport);
 	port->setup = true;
 
 	return 0;
@@ -1764,38 +1763,6 @@ static int qcom_geni_serial_sys_resume(s
 	return ret;
 }
 
-static int qcom_geni_serial_sys_hib_resume(struct device *dev)
-{
-	int ret = 0;
-	struct uart_port *uport;
-	struct qcom_geni_private_data *private_data;
-	struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
-
-	uport = &port->uport;
-	private_data = uport->private_data;
-
-	if (uart_console(uport)) {
-		geni_icc_set_tag(&port->se, QCOM_ICC_TAG_ALWAYS);
-		geni_icc_set_bw(&port->se);
-		ret = uart_resume_port(private_data->drv, uport);
-		/*
-		 * For hibernation usecase clients for
-		 * console UART won't call port setup during restore,
-		 * hence call port setup for console uart.
-		 */
-		qcom_geni_serial_port_setup(uport);
-	} else {
-		/*
-		 * Peripheral register settings are lost during hibernation.
-		 * Update setup flag such that port setup happens again
-		 * during next session. Clients of HS-UART will close and
-		 * open the port during hibernation.
-		 */
-		port->setup = false;
-	}
-	return ret;
-}
-
 static const struct qcom_geni_device_data qcom_geni_console_data = {
 	.console = true,
 	.mode = GENI_SE_FIFO,
@@ -1807,12 +1774,8 @@ static const struct qcom_geni_device_dat
 };
 
 static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
-	.suspend = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
-	.resume = pm_sleep_ptr(qcom_geni_serial_sys_resume),
-	.freeze = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
-	.poweroff = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
-	.restore = pm_sleep_ptr(qcom_geni_serial_sys_hib_resume),
-	.thaw = pm_sleep_ptr(qcom_geni_serial_sys_hib_resume),
+	SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend,
+					qcom_geni_serial_sys_resume)
 };
 
 static const struct of_device_id qcom_geni_serial_match_table[] = {

[PATCH 6.6 117/124] serial: qcom-geni: fix dma rx cancellation

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan+linaro@kernel.org>

commit 23ee4a25661c33e6381d41e848a9060ed6d72845 upstream.

Make sure to wait for the DMA transfer to complete when cancelling the
rx command on stop_rx(). This specifically prevents the DMA completion
interrupt from firing after rx has been restarted, something which can
lead to an IOMMU fault and hosed rx when the interrupt handler unmaps
the DMA buffer for the new command:

	qcom_geni_serial 988000.serial: serial engine reports 0 RX bytes in!
	arm-smmu 15000000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x563
	arm-smmu 15000000.iommu: FSYNR0 = 00210013 [S1CBNDX=33 WNR PLVL=3]
	Bluetooth: hci0: command 0xfc00 tx timeout
	Bluetooth: hci0: Reading QCA version information failed (-110)

Also add the missing state machine reset which is needed in case
cancellation fails.

Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
Cc: stable@vger.kernel.org      # 6.3
Cc: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20241009145110.16847-5-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c |   18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -775,17 +775,27 @@ static void qcom_geni_serial_start_rx_fi
 static void qcom_geni_serial_stop_rx_dma(struct uart_port *uport)
 {
 	struct qcom_geni_serial_port *port = to_dev_port(uport);
+	bool done;
 
 	if (!qcom_geni_serial_secondary_active(uport))
 		return;
 
 	geni_se_cancel_s_cmd(&port->se);
-	qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS,
-				  S_CMD_CANCEL_EN, true);
-
-	if (qcom_geni_serial_secondary_active(uport))
+	done = qcom_geni_serial_poll_bit(uport, SE_DMA_RX_IRQ_STAT,
+			RX_EOT, true);
+	if (done) {
+		writel(RX_EOT | RX_DMA_DONE,
+				uport->membase + SE_DMA_RX_IRQ_CLR);
+	} else {
 		qcom_geni_serial_abort_rx(uport);
 
+		writel(1, uport->membase + SE_DMA_RX_FSM_RST);
+		qcom_geni_serial_poll_bit(uport, SE_DMA_RX_IRQ_STAT,
+				RX_RESET_DONE, true);
+		writel(RX_RESET_DONE | RX_DMA_DONE,
+				uport->membase + SE_DMA_RX_IRQ_CLR);
+	}
+
 	if (port->rx_dma_addr) {
 		geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr,
 				      DMA_RX_BUF_SIZE);

[PATCH 6.6 118/124] serial: qcom-geni: fix receiver enable

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan+linaro@kernel.org>

commit fa103d2599e11e802c818684cff821baefe7f206 upstream.

The receiver is supposed to be enabled in the startup() callback and not
in set_termios() which is called also during console setup.

This specifically avoids accepting input before the port has been opened
(and interrupts enabled), something which can also break the GENI
firmware (cancel fails and after abort, the "stale" counter handling
appears to be broken so that later input is not processed until twelve
chars have been received).

There also does not appear to be any need to keep the receiver disabled
while updating the port settings.

Since commit 6f3c3cafb115 ("serial: qcom-geni: disable interrupts during
console writes") the calls to manipulate the secondary interrupts, which
were done without holding the port lock, can also lead to the receiver
being left disabled when set_termios() races with the console code (e.g.
when init opens the tty during boot). This can manifest itself as a
serial getty not accepting input.

The calls to stop and start rx in set_termios() can similarly race with
DMA completion and, for example, cause the DMA buffer to be unmapped
twice or the mapping to be leaked.

Fix this by only enabling the receiver during startup and while holding
the port lock to avoid racing with the console code.

Fixes: 6f3c3cafb115 ("serial: qcom-geni: disable interrupts during console writes")
Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
Fixes: c4f528795d1a ("tty: serial: msm_geni_serial: Add serial driver support for GENI based QUP")
Cc: stable@vger.kernel.org      # 6.3
Cc: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20241009145110.16847-6-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1159,6 +1159,11 @@ static int qcom_geni_serial_startup(stru
 		if (ret)
 			return ret;
 	}
+
+	uart_port_lock_irq(uport);
+	qcom_geni_serial_start_rx(uport);
+	uart_port_unlock_irq(uport);
+
 	enable_irq(uport->irq);
 
 	return 0;
@@ -1244,7 +1249,6 @@ static void qcom_geni_serial_set_termios
 	unsigned int avg_bw_core;
 	unsigned long timeout;
 
-	qcom_geni_serial_stop_rx(uport);
 	/* baud rate */
 	baud = uart_get_baud_rate(uport, termios, old, 300, 4000000);
 
@@ -1260,7 +1264,7 @@ static void qcom_geni_serial_set_termios
 		dev_err(port->se.dev,
 			"Couldn't find suitable clock rate for %u\n",
 			baud * sampling_rate);
-		goto out_restart_rx;
+		return;
 	}
 
 	dev_dbg(port->se.dev, "desired_rate = %u, clk_rate = %lu, clk_div = %u\n",
@@ -1351,8 +1355,6 @@ static void qcom_geni_serial_set_termios
 	writel(stop_bit_len, uport->membase + SE_UART_TX_STOP_BIT_LEN);
 	writel(ser_clk_cfg, uport->membase + GENI_SER_M_CLK_CFG);
 	writel(ser_clk_cfg, uport->membase + GENI_SER_S_CLK_CFG);
-out_restart_rx:
-	qcom_geni_serial_start_rx(uport);
 }
 
 #ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE

[PATCH 6.6 119/124] tcp: fix mptcp DSS corruption due to large pmtu xmit

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Abeni <pabeni@redhat.com>

commit 4dabcdf581217e60690467a37c956a5b8dbc6bd9 upstream.

Syzkaller was able to trigger a DSS corruption:

  TCP: request_sock_subflow_v4: Possible SYN flooding on port [::]:20002. Sending cookies.
  ------------[ cut here ]------------
  WARNING: CPU: 0 PID: 5227 at net/mptcp/protocol.c:695 __mptcp_move_skbs_from_subflow+0x20a9/0x21f0 net/mptcp/protocol.c:695
  Modules linked in:
  CPU: 0 UID: 0 PID: 5227 Comm: syz-executor350 Not tainted 6.11.0-syzkaller-08829-gaf9c191ac2a0 #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
  RIP: 0010:__mptcp_move_skbs_from_subflow+0x20a9/0x21f0 net/mptcp/protocol.c:695
  Code: 0f b6 dc 31 ff 89 de e8 b5 dd ea f5 89 d8 48 81 c4 50 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 98 da ea f5 90 <0f> 0b 90 e9 47 ff ff ff e8 8a da ea f5 90 0f 0b 90 e9 99 e0 ff ff
  RSP: 0018:ffffc90000006db8 EFLAGS: 00010246
  RAX: ffffffff8ba9df18 RBX: 00000000000055f0 RCX: ffff888030023c00
  RDX: 0000000000000100 RSI: 00000000000081e5 RDI: 00000000000055f0
  RBP: 1ffff110062bf1ae R08: ffffffff8ba9cf12 R09: 1ffff110062bf1b8
  R10: dffffc0000000000 R11: ffffed10062bf1b9 R12: 0000000000000000
  R13: dffffc0000000000 R14: 00000000700cec61 R15: 00000000000081e5
  FS:  000055556679c380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000020287000 CR3: 0000000077892000 CR4: 00000000003506f0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   <IRQ>
   move_skbs_to_msk net/mptcp/protocol.c:811 [inline]
   mptcp_data_ready+0x29c/0xa90 net/mptcp/protocol.c:854
   subflow_data_ready+0x34a/0x920 net/mptcp/subflow.c:1490
   tcp_data_queue+0x20fd/0x76c0 net/ipv4/tcp_input.c:5283
   tcp_rcv_established+0xfba/0x2020 net/ipv4/tcp_input.c:6237
   tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1915
   tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2350
   ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
   ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
   NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
   NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
   __netif_receive_skb_one_core net/core/dev.c:5662 [inline]
   __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
   process_backlog+0x662/0x15b0 net/core/dev.c:6107
   __napi_poll+0xcb/0x490 net/core/dev.c:6771
   napi_poll net/core/dev.c:6840 [inline]
   net_rx_action+0x89b/0x1240 net/core/dev.c:6962
   handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
   do_softirq+0x11b/0x1e0 kernel/softirq.c:455
   </IRQ>
   <TASK>
   __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
   local_bh_enable include/linux/bottom_half.h:33 [inline]
   rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
   __dev_queue_xmit+0x1764/0x3e80 net/core/dev.c:4451
   dev_queue_xmit include/linux/netdevice.h:3094 [inline]
   neigh_hh_output include/net/neighbour.h:526 [inline]
   neigh_output include/net/neighbour.h:540 [inline]
   ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236
   ip_local_out net/ipv4/ip_output.c:130 [inline]
   __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:536
   __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
   tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
   tcp_mtu_probe net/ipv4/tcp_output.c:2547 [inline]
   tcp_write_xmit+0x641d/0x6bf0 net/ipv4/tcp_output.c:2752
   __tcp_push_pending_frames+0x9b/0x360 net/ipv4/tcp_output.c:3015
   tcp_push_pending_frames include/net/tcp.h:2107 [inline]
   tcp_data_snd_check net/ipv4/tcp_input.c:5714 [inline]
   tcp_rcv_established+0x1026/0x2020 net/ipv4/tcp_input.c:6239
   tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1915
   sk_backlog_rcv include/net/sock.h:1113 [inline]
   __release_sock+0x214/0x350 net/core/sock.c:3072
   release_sock+0x61/0x1f0 net/core/sock.c:3626
   mptcp_push_release net/mptcp/protocol.c:1486 [inline]
   __mptcp_push_pending+0x6b5/0x9f0 net/mptcp/protocol.c:1625
   mptcp_sendmsg+0x10bb/0x1b10 net/mptcp/protocol.c:1903
   sock_sendmsg_nosec net/socket.c:730 [inline]
   __sock_sendmsg+0x1a6/0x270 net/socket.c:745
   ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2603
   ___sys_sendmsg net/socket.c:2657 [inline]
   __sys_sendmsg+0x2aa/0x390 net/socket.c:2686
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f
  RIP: 0033:0x7fb06e9317f9
  Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
  RSP: 002b:00007ffe2cfd4f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
  RAX: ffffffffffffffda RBX: 00007fb06e97f468 RCX: 00007fb06e9317f9
  RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
  RBP: 00007fb06e97f446 R08: 0000555500000000 R09: 0000555500000000
  R10: 0000555500000000 R11: 0000000000000246 R12: 00007fb06e97f406
  R13: 0000000000000001 R14: 00007ffe2cfd4fe0 R15: 0000000000000003
   </TASK>

Additionally syzkaller provided a nice reproducer. The repro enables
pmtu on the loopback device, leading to tcp_mtu_probe() generating
very large probe packets.

tcp_can_coalesce_send_queue_head() currently does not check for
mptcp-level invariants, and allowed the creation of cross-DSS probes,
leading to the mentioned corruption.

Address the issue teaching tcp_can_coalesce_send_queue_head() about
mptcp using the tcp_skb_can_collapse(), also reducing the code
duplication.

Fixes: 85712484110d ("tcp: coalesce/collapse must respect MPTCP extensions")
Cc: stable@vger.kernel.org
Reported-by: syzbot+d1bff73460e33101f0e7@syzkaller.appspotmail.com
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/513
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20241008-net-mptcp-fallback-fixes-v1-2-c6fb8e93e551@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[ Conflict in tcp_output.c, because the commit 65249feb6b3d ("net: add
  support for skbs with unreadable frags") is not in this version. This
  commit is linked to a new feature (Devmem TCP) and introduces a new
  condition which causes the conflicts. Resolving this is easy: we can
  ignore the missing new condition, and use tcp_skb_can_collapse() like
  in the original patch. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/tcp_output.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2314,9 +2314,7 @@ static bool tcp_can_coalesce_send_queue_
 		if (len <= skb->len)
 			break;
 
-		if (unlikely(TCP_SKB_CB(skb)->eor) ||
-		    tcp_has_tx_tstamp(skb) ||
-		    !skb_pure_zcopy_same(skb, next))
+		if (tcp_has_tx_tstamp(skb) || !tcp_skb_can_collapse(skb, next))
 			return false;
 
 		len -= skb->len;

[PATCH 6.6 120/124] selftests: mptcp: join: change capture/checksum as bool

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Geliang Tang <tanggeliang@kylinos.cn>

commit 8c6f6b4bb53a904f922dfb90d566391d3feee32c upstream.

To maintain consistency with other scripts, this patch changes vars
'capture' and 'checksum' as bool vars in mptcp_join.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/r/20240223-upstream-net-next-20240223-misc-improvements-v1-7-b6c8a10396bd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 5afca7e996c4 ("selftests: mptcp: join: test for prohibited MPC to port-based endp")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/net/mptcp/mptcp_join.sh |   22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -30,11 +30,11 @@ iptables="iptables"
 ip6tables="ip6tables"
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
-capture=0
-checksum=0
+capture=false
+checksum=false
 ip_mptcp=0
 check_invert=0
-validate_checksum=0
+validate_checksum=false
 init=0
 evts_ns1=""
 evts_ns2=""
@@ -99,7 +99,7 @@ init_partial()
 		ip netns exec $netns sysctl -q net.mptcp.pm_type=0 2>/dev/null || true
 		ip netns exec $netns sysctl -q net.ipv4.conf.all.rp_filter=0
 		ip netns exec $netns sysctl -q net.ipv4.conf.default.rp_filter=0
-		if [ $checksum -eq 1 ]; then
+		if $checksum; then
 			ip netns exec $netns sysctl -q net.mptcp.checksum_enabled=1
 		fi
 	done
@@ -386,7 +386,7 @@ reset_with_checksum()
 	ip netns exec $ns1 sysctl -q net.mptcp.checksum_enabled=$ns1_enable
 	ip netns exec $ns2 sysctl -q net.mptcp.checksum_enabled=$ns2_enable
 
-	validate_checksum=1
+	validate_checksum=true
 }
 
 reset_with_allow_join_id0()
@@ -419,7 +419,7 @@ reset_with_allow_join_id0()
 setup_fail_rules()
 {
 	check_invert=1
-	validate_checksum=1
+	validate_checksum=true
 	local i="$1"
 	local ip="${2:-4}"
 	local tables
@@ -1024,7 +1024,7 @@ do_transfer()
 	:> "$sout"
 	:> "$capout"
 
-	if [ $capture -eq 1 ]; then
+	if $capture; then
 		local capuser
 		if [ -z $SUDO_USER ] ; then
 			capuser=""
@@ -1125,7 +1125,7 @@ do_transfer()
 	wait $spid
 	local rets=$?
 
-	if [ $capture -eq 1 ]; then
+	if $capture; then
 	    sleep 1
 	    kill $cappid
 	fi
@@ -1514,7 +1514,7 @@ chk_join_nr()
 	else
 		print_ok
 	fi
-	if [ $validate_checksum -eq 1 ]; then
+	if $validate_checksum; then
 		chk_csum_nr $csum_ns1 $csum_ns2
 		chk_fail_nr $fail_nr $fail_nr
 		chk_rst_nr $rst_nr $rst_nr
@@ -3960,10 +3960,10 @@ while getopts "${all_tests_args}cCih" op
 			tests+=("${all_tests[${opt}]}")
 			;;
 		c)
-			capture=1
+			capture=true
 			;;
 		C)
-			checksum=1
+			checksum=true
 			;;
 		i)
 			ip_mptcp=1

[PATCH 6.6 121/124] selftests: mptcp: join: test for prohibited MPC to port-based endp

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Abeni <pabeni@redhat.com>

commit 5afca7e996c42aed1b4a42d4712817601ba42aff upstream.

Explicitly verify that MPC connection attempts towards a port-based
signal endpoint fail with a reset.

Note that this new test is a bit different from the other ones, not
using 'run_tests'. It is then needed to add the capture capability, and
the picking the right port which have been extracted into three new
helpers. The info about the capture can also be printed from a single
point, which simplifies the exit paths in do_transfer().

The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it validates the previous fix for an issue introduced by this commit
ID.

Fixes: 1729cf186d8a ("mptcp: create the listening socket for new port")
Cc: stable@vger.kernel.org
Co-developed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20241014-net-mptcp-mpc-port-endp-v2-2-7faea8e6b6ae@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[ Conflicts in mptcp_join.sh, because commit 0bd962dd86b2 ("selftests:
  mptcp: join: check CURRESTAB counters"), and commit 9e6a39ecb9a1
  ("selftests: mptcp: export TEST_COUNTER variable") are linked to new
  features, not available in this version. Resolving the conflicts is
  easy, simply adding the new helpers before do_transfer(), and rename
  MPTCP_LIB_TEST_COUNTER to TEST_COUNT that was used before. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/net/mptcp/mptcp_join.sh |  115 +++++++++++++++++-------
 1 file changed, 85 insertions(+), 30 deletions(-)

--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -23,6 +23,7 @@ tmpfile=""
 cout=""
 err=""
 capout=""
+cappid=""
 ns1=""
 ns2=""
 ksft_skip=4
@@ -1006,40 +1007,62 @@ pm_nl_set_endpoint()
 	fi
 }
 
-do_transfer()
+cond_start_capture()
 {
-	local listener_ns="$1"
-	local connector_ns="$2"
-	local cl_proto="$3"
-	local srv_proto="$4"
-	local connect_addr="$5"
-
-	local port=$((10000 + TEST_COUNT - 1))
-	local cappid
-	local FAILING_LINKS=${FAILING_LINKS:-""}
-	local fastclose=${fastclose:-""}
-	local speed=${speed:-"fast"}
+	local ns="$1"
 
-	:> "$cout"
-	:> "$sout"
 	:> "$capout"
 
 	if $capture; then
-		local capuser
-		if [ -z $SUDO_USER ] ; then
+		local capuser capfile
+		if [ -z $SUDO_USER ]; then
 			capuser=""
 		else
 			capuser="-Z $SUDO_USER"
 		fi
 
-		capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "${listener_ns}")
+		capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "$ns")
 
 		echo "Capturing traffic for test $TEST_COUNT into $capfile"
-		ip netns exec ${listener_ns} tcpdump -i any -s 65535 -B 32768 $capuser -w $capfile > "$capout" 2>&1 &
+		ip netns exec "$ns" tcpdump -i any -s 65535 -B 32768 $capuser -w "$capfile" > "$capout" 2>&1 &
 		cappid=$!
 
 		sleep 1
 	fi
+}
+
+cond_stop_capture()
+{
+	if $capture; then
+		sleep 1
+		kill $cappid
+		cat "$capout"
+	fi
+}
+
+get_port()
+{
+	echo "$((10000 + TEST_COUNT - 1))"
+}
+
+do_transfer()
+{
+	local listener_ns="$1"
+	local connector_ns="$2"
+	local cl_proto="$3"
+	local srv_proto="$4"
+	local connect_addr="$5"
+	local port
+
+	local FAILING_LINKS=${FAILING_LINKS:-""}
+	local fastclose=${fastclose:-""}
+	local speed=${speed:-"fast"}
+	port=$(get_port)
+
+	:> "$cout"
+	:> "$sout"
+
+	cond_start_capture ${listener_ns}
 
 	NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \
 		nstat -n
@@ -1125,10 +1148,7 @@ do_transfer()
 	wait $spid
 	local rets=$?
 
-	if $capture; then
-	    sleep 1
-	    kill $cappid
-	fi
+	cond_stop_capture
 
 	NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \
 		nstat | grep Tcp > /tmp/${listener_ns}.out
@@ -1144,7 +1164,6 @@ do_transfer()
 		ip netns exec ${connector_ns} ss -Menita 1>&2 -o "dport = :$port"
 		cat /tmp/${connector_ns}.out
 
-		cat "$capout"
 		return 1
 	fi
 
@@ -1161,13 +1180,7 @@ do_transfer()
 	fi
 	rets=$?
 
-	if [ $retc -eq 0 ] && [ $rets -eq 0 ];then
-		cat "$capout"
-		return 0
-	fi
-
-	cat "$capout"
-	return 1
+	[ $retc -eq 0 ] && [ $rets -eq 0 ]
 }
 
 make_file()
@@ -2944,6 +2957,32 @@ verify_listener_events()
 	fail_test "$e_type:$type $e_family:$family $e_saddr:$saddr $e_sport:$sport"
 }
 
+chk_mpc_endp_attempt()
+{
+	local retl=$1
+	local attempts=$2
+
+	print_check "Connect"
+
+	if [ ${retl} = 124 ]; then
+		fail_test "timeout on connect"
+	elif [ ${retl} = 0 ]; then
+		fail_test "unexpected successful connect"
+	else
+		print_ok
+
+		print_check "Attempts"
+		count=$(mptcp_lib_get_counter ${ns1} "MPTcpExtMPCapableEndpAttempt")
+		if [ -z "$count" ]; then
+			print_skip
+		elif [ "$count" != "$attempts" ]; then
+			fail_test "got ${count} MPC attempt[s] on port-based endpoint, expected ${attempts}"
+		else
+			print_ok
+		fi
+	fi
+}
+
 add_addr_ports_tests()
 {
 	# signal address with port
@@ -3034,6 +3073,22 @@ add_addr_ports_tests()
 		chk_join_nr 2 2 2
 		chk_add_nr 2 2 2
 	fi
+
+	if reset "port-based signal endpoint must not accept mpc"; then
+		local port retl count
+		port=$(get_port)
+
+		cond_start_capture ${ns1}
+		pm_nl_add_endpoint ${ns1} 10.0.2.1 flags signal port ${port}
+		mptcp_lib_wait_local_port_listen ${ns1} ${port}
+
+		timeout 1 ip netns exec ${ns2} \
+			./mptcp_connect -t ${timeout_poll} -p $port -s MPTCP 10.0.2.1 >/dev/null 2>&1
+		retl=$?
+		cond_stop_capture
+
+		chk_mpc_endp_attempt ${retl} 1
+	fi
 }
 
 syncookies_tests()

[PATCH 6.6 122/124] selftests: mptcp: remove duplicated variables

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>

A few week ago, there were some backport issues in MPTCP selftests,
because some patches have been applied twice, but with versions handling
conflicts differently [1].

Patches fixing these issues have been sent [2] and applied, but it looks
like quilt was still confused with the removal of some patches, and
commit a417ef47a665 ("selftests: mptcp: join: validate event numbers")
duplicated some variables, not present in the original patch [3].

Anyway, Bash was complaining, but that was not causing any tests to
fail. Also, that's easy to fix by simply removing the duplicated ones.

Link: https://lore.kernel.org/fc21db4a-508d-41db-aa45-e3bc06d18ce7@kernel.org [1]
Link: https://lore.kernel.org/20240905144306.1192409-5-matttbe@kernel.org [2]
Link: https://lore.kernel.org/20240905144306.1192409-7-matttbe@kernel.org [3]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/testing/selftests/net/mptcp/mptcp_lib.sh |   11 -----------
 1 file changed, 11 deletions(-)

--- a/tools/testing/selftests/net/mptcp/mptcp_lib.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_lib.sh
@@ -9,17 +9,6 @@ readonly KSFT_SKIP=4
 readonly KSFT_TEST="${MPTCP_LIB_KSFT_TEST:-$(basename "${0}" .sh)}"
 
 # These variables are used in some selftests, read-only
-declare -rx MPTCP_LIB_EVENT_ANNOUNCED=6         # MPTCP_EVENT_ANNOUNCED
-declare -rx MPTCP_LIB_EVENT_REMOVED=7           # MPTCP_EVENT_REMOVED
-declare -rx MPTCP_LIB_EVENT_SUB_ESTABLISHED=10  # MPTCP_EVENT_SUB_ESTABLISHED
-declare -rx MPTCP_LIB_EVENT_SUB_CLOSED=11       # MPTCP_EVENT_SUB_CLOSED
-declare -rx MPTCP_LIB_EVENT_LISTENER_CREATED=15 # MPTCP_EVENT_LISTENER_CREATED
-declare -rx MPTCP_LIB_EVENT_LISTENER_CLOSED=16  # MPTCP_EVENT_LISTENER_CLOSED
-
-declare -rx MPTCP_LIB_AF_INET=2
-declare -rx MPTCP_LIB_AF_INET6=10
-
-# These variables are used in some selftests, read-only
 declare -rx MPTCP_LIB_EVENT_CREATED=1           # MPTCP_EVENT_CREATED
 declare -rx MPTCP_LIB_EVENT_ESTABLISHED=2       # MPTCP_EVENT_ESTABLISHED
 declare -rx MPTCP_LIB_EVENT_CLOSED=3            # MPTCP_EVENT_CLOSED

[PATCH 6.6 123/124] nilfs2: propagate directory read errors from nilfs_find_entry()

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ryusuke Konishi <konishi.ryusuke@gmail.com>

commit 08cfa12adf888db98879dbd735bc741360a34168 upstream.

Syzbot reported that a task hang occurs in vcs_open() during a fuzzing
test for nilfs2.

The root cause of this problem is that in nilfs_find_entry(), which
searches for directory entries, ignores errors when loading a directory
page/folio via nilfs_get_folio() fails.

If the filesystem images is corrupted, and the i_size of the directory
inode is large, and the directory page/folio is successfully read but
fails the sanity check, for example when it is zero-filled,
nilfs_check_folio() may continue to spit out error messages in bursts.

Fix this issue by propagating the error to the callers when loading a
page/folio fails in nilfs_find_entry().

The current interface of nilfs_find_entry() and its callers is outdated
and cannot propagate error codes such as -EIO and -ENOMEM returned via
nilfs_find_entry(), so fix it together.

Link: https://lkml.kernel.org/r/20241004033640.6841-1-konishi.ryusuke@gmail.com
Fixes: 2ba466d74ed7 ("nilfs2: directory entry operations")
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: Lizhi Xu <lizhi.xu@windriver.com>
Closes: https://lkml.kernel.org/r/20240927013806.3577931-1-lizhi.xu@windriver.com
Reported-by: syzbot+8a192e8d090fa9a31135@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=8a192e8d090fa9a31135
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/nilfs2/dir.c   |   50 +++++++++++++++++++++++++++-----------------------
 fs/nilfs2/namei.c |   39 ++++++++++++++++++++++++++-------------
 fs/nilfs2/nilfs.h |    2 +-
 3 files changed, 54 insertions(+), 37 deletions(-)

--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -331,6 +331,8 @@ static int nilfs_readdir(struct file *fi
  * returns the page in which the entry was found, and the entry itself
  * (as a parameter - res_dir). Page is returned mapped and unlocked.
  * Entry is guaranteed to be valid.
+ *
+ * On failure, returns an error pointer and the caller should ignore res_page.
  */
 struct nilfs_dir_entry *
 nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
@@ -358,22 +360,24 @@ nilfs_find_entry(struct inode *dir, cons
 	do {
 		char *kaddr = nilfs_get_page(dir, n, &page);
 
-		if (!IS_ERR(kaddr)) {
-			de = (struct nilfs_dir_entry *)kaddr;
-			kaddr += nilfs_last_byte(dir, n) - reclen;
-			while ((char *) de <= kaddr) {
-				if (de->rec_len == 0) {
-					nilfs_error(dir->i_sb,
-						"zero-length directory entry");
-					nilfs_put_page(page);
-					goto out;
-				}
-				if (nilfs_match(namelen, name, de))
-					goto found;
-				de = nilfs_next_entry(de);
+		if (IS_ERR(kaddr))
+			return ERR_CAST(kaddr);
+
+		de = (struct nilfs_dir_entry *)kaddr;
+		kaddr += nilfs_last_byte(dir, n) - reclen;
+		while ((char *)de <= kaddr) {
+			if (de->rec_len == 0) {
+				nilfs_error(dir->i_sb,
+					    "zero-length directory entry");
+				nilfs_put_page(page);
+				goto out;
 			}
-			nilfs_put_page(page);
+			if (nilfs_match(namelen, name, de))
+				goto found;
+			de = nilfs_next_entry(de);
 		}
+		nilfs_put_page(page);
+
 		if (++n >= npages)
 			n = 0;
 		/* next page is past the blocks we've got */
@@ -386,7 +390,7 @@ nilfs_find_entry(struct inode *dir, cons
 		}
 	} while (n != start);
 out:
-	return NULL;
+	return ERR_PTR(-ENOENT);
 
 found:
 	*res_page = page;
@@ -431,19 +435,19 @@ fail:
 	return NULL;
 }
 
-ino_t nilfs_inode_by_name(struct inode *dir, const struct qstr *qstr)
+int nilfs_inode_by_name(struct inode *dir, const struct qstr *qstr, ino_t *ino)
 {
-	ino_t res = 0;
 	struct nilfs_dir_entry *de;
 	struct page *page;
 
 	de = nilfs_find_entry(dir, qstr, &page);
-	if (de) {
-		res = le64_to_cpu(de->inode);
-		kunmap(page);
-		put_page(page);
-	}
-	return res;
+	if (IS_ERR(de))
+		return PTR_ERR(de);
+
+	*ino = le64_to_cpu(de->inode);
+	kunmap(page);
+	put_page(page);
+	return 0;
 }
 
 /* Releases the page */
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -55,12 +55,20 @@ nilfs_lookup(struct inode *dir, struct d
 {
 	struct inode *inode;
 	ino_t ino;
+	int res;
 
 	if (dentry->d_name.len > NILFS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	ino = nilfs_inode_by_name(dir, &dentry->d_name);
-	inode = ino ? nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino) : NULL;
+	res = nilfs_inode_by_name(dir, &dentry->d_name, &ino);
+	if (res) {
+		if (res != -ENOENT)
+			return ERR_PTR(res);
+		inode = NULL;
+	} else {
+		inode = nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino);
+	}
+
 	return d_splice_alias(inode, dentry);
 }
 
@@ -263,10 +271,11 @@ static int nilfs_do_unlink(struct inode
 	struct page *page;
 	int err;
 
-	err = -ENOENT;
 	de = nilfs_find_entry(dir, &dentry->d_name, &page);
-	if (!de)
+	if (IS_ERR(de)) {
+		err = PTR_ERR(de);
 		goto out;
+	}
 
 	inode = d_inode(dentry);
 	err = -EIO;
@@ -361,10 +370,11 @@ static int nilfs_rename(struct mnt_idmap
 	if (unlikely(err))
 		return err;
 
-	err = -ENOENT;
 	old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page);
-	if (!old_de)
+	if (IS_ERR(old_de)) {
+		err = PTR_ERR(old_de);
 		goto out;
+	}
 
 	if (S_ISDIR(old_inode->i_mode)) {
 		err = -EIO;
@@ -381,10 +391,12 @@ static int nilfs_rename(struct mnt_idmap
 		if (dir_de && !nilfs_empty_dir(new_inode))
 			goto out_dir;
 
-		err = -ENOENT;
-		new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page);
-		if (!new_de)
+		new_de = nilfs_find_entry(new_dir, &new_dentry->d_name,
+					  &new_page);
+		if (IS_ERR(new_de)) {
+			err = PTR_ERR(new_de);
 			goto out_dir;
+		}
 		nilfs_set_link(new_dir, new_de, new_page, old_inode);
 		nilfs_mark_inode_dirty(new_dir);
 		inode_set_ctime_current(new_inode);
@@ -438,13 +450,14 @@ out:
  */
 static struct dentry *nilfs_get_parent(struct dentry *child)
 {
-	unsigned long ino;
+	ino_t ino;
+	int res;
 	struct inode *inode;
 	struct nilfs_root *root;
 
-	ino = nilfs_inode_by_name(d_inode(child), &dotdot_name);
-	if (!ino)
-		return ERR_PTR(-ENOENT);
+	res = nilfs_inode_by_name(d_inode(child), &dotdot_name, &ino);
+	if (res)
+		return ERR_PTR(res);
 
 	root = NILFS_I(d_inode(child))->i_root;
 
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -233,7 +233,7 @@ static inline __u32 nilfs_mask_flags(umo
 
 /* dir.c */
 extern int nilfs_add_link(struct dentry *, struct inode *);
-extern ino_t nilfs_inode_by_name(struct inode *, const struct qstr *);
+int nilfs_inode_by_name(struct inode *dir, const struct qstr *qstr, ino_t *ino);
 extern int nilfs_make_empty(struct inode *, struct inode *);
 extern struct nilfs_dir_entry *
 nilfs_find_entry(struct inode *, const struct qstr *, struct page **);

[PATCH 6.6 124/124] ALSA: hda/conexant - Use cached pin control for Node 0x1d on HP EliteOne 1000 G2

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vasiliy Kovalev <kovalev@altlinux.org>

commit 164cd0e077a18d6208523c82b102c98c77fdd51f upstream.

The cached version avoids redundant commands to the codec, improving
stability and reducing unnecessary operations. This change ensures
better power management and reliable restoration of pin configurations,
especially after hibernation (S4) and other power transitions.

Fixes: 9988844c457f ("ALSA: hda/conexant - Fix audio routing for HP EliteOne 1000 G2")
Suggested-by: Kai-Heng Feng <kaihengf@nvidia.com>
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vasiliy Kovalev <kovalev@altlinux.org>
Link: https://patch.msgid.link/20241016080713.46801-1-kovalev@altlinux.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/pci/hda/patch_conexant.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -334,7 +334,7 @@ static void cxt_fixup_update_pinctl(stru
 		 * This is the value stored in the codec register after
 		 * the correct initialization of the previous windows boot.
 		 */
-		snd_hda_set_pin_ctl(codec, 0x1d, AC_PINCTL_HP_EN);
+		snd_hda_set_pin_ctl_cache(codec, 0x1d, AC_PINCTL_HP_EN);
 	}
 }
 

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[SeongJae Park]

Hello,

On Mon, 21 Oct 2024 12:23:24 +0200 Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:

> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y

This rc kernel passes DAMON functionality test[1] on my test machine.
Attaching the test results summary below.  Please note that I retrieved the
kernel from linux-stable-rc tree[2].

Tested-by: SeongJae Park <sj@kernel.org>

[1] https://github.com/damonitor/damon-tests/tree/next/corr
[2] 6cb44f821fff ("Linux 6.6.58-rc1")

Thanks,
SJ

[...]

---

ok 1 selftests: damon: debugfs_attrs.sh
ok 2 selftests: damon: debugfs_schemes.sh
ok 3 selftests: damon: debugfs_target_ids.sh
ok 4 selftests: damon: debugfs_empty_targets.sh
ok 5 selftests: damon: debugfs_huge_count_read_write.sh
ok 6 selftests: damon: debugfs_duplicate_context_creation.sh
ok 7 selftests: damon: debugfs_rm_non_contexts.sh
ok 8 selftests: damon: sysfs.sh
ok 9 selftests: damon: sysfs_update_removed_scheme_dir.sh
ok 10 selftests: damon: reclaim.sh
ok 11 selftests: damon: lru_sort.sh
ok 1 selftests: damon-tests: kunit.sh
ok 2 selftests: damon-tests: huge_count_read_write.sh
ok 3 selftests: damon-tests: buffer_overflow.sh
ok 4 selftests: damon-tests: rm_contexts.sh
ok 5 selftests: damon-tests: record_null_deref.sh
ok 6 selftests: damon-tests: dbgfs_target_ids_read_before_terminate_race.sh
ok 7 selftests: damon-tests: dbgfs_target_ids_pid_leak.sh
ok 8 selftests: damon-tests: damo_tests.sh
ok 9 selftests: damon-tests: masim-record.sh
ok 10 selftests: damon-tests: build_i386.sh
ok 11 selftests: damon-tests: build_arm64.sh # SKIP
ok 12 selftests: damon-tests: build_m68k.sh # SKIP
ok 13 selftests: damon-tests: build_i386_idle_flag.sh
ok 14 selftests: damon-tests: build_i386_highpte.sh
ok 15 selftests: damon-tests: build_nomemcg.sh
 [33m
 [92mPASS [39m

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Florian Fainelli]

On 10/21/24 03:23, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels, build tested on 
BMIPS_GENERIC:

Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
-- 
Florian

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Naresh Kamboju]

On Mon, 21 Oct 2024 at 16:05, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h


Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>

## Build
* kernel: 6.6.58-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: 6cb44f821fff24ed5cca1de30a2acc48ec426f1e
* git describe: v6.6.57-125-g6cb44f821fff
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.57-125-g6cb44f821fff

## Test Regressions (compared to v6.6.56-212-ga3810192966c)

## Metric Regressions (compared to v6.6.56-212-ga3810192966c)

## Test Fixes (compared to v6.6.56-212-ga3810192966c)

## Metric Fixes (compared to v6.6.56-212-ga3810192966c)

## Test result summary
total: 111049, pass: 90448, fail: 1389, skip: 19120, xfail: 92

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 129 total, 129 passed, 0 failed
* arm64: 41 total, 41 passed, 0 failed
* i386: 28 total, 26 passed, 2 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 36 total, 35 passed, 1 failed
* riscv: 19 total, 19 passed, 0 failed
* s390: 14 total, 13 passed, 1 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 33 total, 33 passed, 0 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-filesystems
* kselftest-filesystems-binderfs
* kselftest-filesystems-epoll
* kselftest-firmware
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-watchdog
* kselftest-x86
* kunit
* kvm-unit-tests
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-test
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-ipc
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Harshit Mogalapalli]

Hi Greg,

On 21/10/24 15:53, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.


No problems seen on x86_64 and aarch64 with our testing.

Tested-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>

Thanks,
Harshit

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Shuah Khan]

On 10/21/24 04:23, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Mark Brown]

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On Mon, Oct 21, 2024 at 12:23:24PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Tested-by: Mark Brown <broonie@kernel.org>

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Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Takeshi Ogasawara]

Hi Greg

On Mon, Oct 21, 2024 at 7:39 PM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>

6.6.58-rc1 tested.

Build successfully completed.
Boot successfully completed.
No dmesg regressions.
Video output normal.
Sound output normal.

Lenovo ThinkPad X1 Carbon Gen10(Intel i7-1260P(x86_64) arch linux)

[    0.000000] Linux version 6.6.58-rc1rv
(takeshi@ThinkPadX1Gen10J0764) (gcc (GCC) 14.2.1 20240910, GNU ld (GNU
Binutils) 2.43.0) #1 SMP PREEMPT_DYNAMIC Tue Oct 22 21:03:58 JST 2024

Thanks

Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com>

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Jon Hunter]

On Mon, 21 Oct 2024 12:23:24 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

Failures detected for Tegra ...

Test results for stable-v6.6:
    10 builds:	10 pass, 0 fail
    27 boots:	26 pass, 1 fail
    111 tests:	111 pass, 0 fail

Linux version:	6.6.58-rc1-g6cb44f821fff
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra194-p2972-0000, tegra194-p3509-0000+p3668-0000,
                tegra20-ventana, tegra210-p2371-2180,
                tegra210-p3450-0000, tegra30-cardhu-a04

Boot failures:	tegra30-cardhu-a04

Jon

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Muhammad Usama Anjum]

On 10/21/24 3:23 PM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.58 release.
> There are 124 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 
> -------------
Hi,

Please find the KernelCI report below :-


OVERVIEW

    Builds: 25 passed, 0 failed

    Boot tests: 62 passed, 0 failed

    CI systems: maestro

REVISION

    Commit
        name: 
        hash: 6cb44f821fff24ed5cca1de30a2acc48ec426f1e
    Checked out from
        https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y


BUILDS

    No new build failures found

BOOT TESTS

    No new boot failures found

See complete and up-to-date report at:
 https://kcidb.kernelci.org/d/revision/revision?orgId=1&var-datasource=edquppk2ghfcwc&var-git_commit_hash=6cb44f821fff24ed5cca1de30a2acc48ec426f1e&var-patchset_hash=&var-origin=maestro&var-build_architecture=All&var-build_config_name=All&var-test_path=boot

Tested-by: kernelci.org bot <bot@kernelci.org>

Thanks,
KernelCI team

Re: [PATCH 6.6 000/124] 6.6.58-rc1 review

[Jon Hunter]

On 22/10/2024 18:56, Jon Hunter wrote:
> On Mon, 21 Oct 2024 12:23:24 +0200, Greg Kroah-Hartman wrote:
>> This is the start of the stable review cycle for the 6.6.58 release.
>> There are 124 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
>>
>> Responses should be made by Wed, 23 Oct 2024 10:22:25 +0000.
>> Anything received after that time might be too late.
>>
>> The whole patch series can be found in one patch at:
>> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.58-rc1.gz
>> or in the git tree and branch at:
>> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
> 
> Failures detected for Tegra ...
> 
> Test results for stable-v6.6:
>      10 builds:	10 pass, 0 fail
>      27 boots:	26 pass, 1 fail
>      111 tests:	111 pass, 0 fail
> 
> Linux version:	6.6.58-rc1-g6cb44f821fff
> Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
>                  tegra194-p2972-0000, tegra194-p3509-0000+p3668-0000,
>                  tegra20-ventana, tegra210-p2371-2180,
>                  tegra210-p3450-0000, tegra30-cardhu-a04
> 
> Boot failures:	tegra30-cardhu-a04

This appears to be a board issue. With that ...

Tested-by: Jon Hunter <jonathanh@nvidia.com>

Thanks
Jon

-- 
nvpublic