From: Greg KH <greg@kroah.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>, stable <stable@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()"
Date: Tue, 8 Nov 2016 11:36:57 +0100 [thread overview]
Message-ID: <20161108103657.GA10689@kroah.com> (raw)
In-Reply-To: <CA+55aFwXuut8k29cYqnCGjgk9Ymq--Zjfziz+sM__FVLoTJu+A@mail.gmail.com>
On Mon, Nov 07, 2016 at 08:45:59AM -0800, Linus Torvalds wrote:
> So a patch something like this might be a safe way to fix the
> potential infoleak in older kernels.
>
> THIS IS UNTESTED. It's a very obvious patch, though, so if it compiles
> it probably works. It just initializes the output variable with 0 in
> the inline asm description, instead of doing it in the exception
> handler.
>
> It will generate slightly worse code (a few unnecessary ALU
> operations), but it doesn't have any interactions with the exception
> handler implementation.
It builds here, so I've queued it up for 4.4-stable, let's see if
the auto-builders have any problems with it. Thanks for the patch.
greg k-h
next prev parent reply other threads:[~2016-11-08 10:37 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20161107130417epcas3p4869f405f9f73d6336d5dbfd0e118b62b@epcas3p4.samsung.com>
2016-11-07 13:04 ` [PATCH 3.12 00/72] 3.12.67-stable review Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 01/72] i40e: avoid NULL pointer dereference and recursive errors on early PCI error Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 02/72] reiserfs: Unlock superblock before calling reiserfs_quota_on_mount() Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 03/72] scsi: ibmvfc: Fix I/O hang when port is not mapped Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 04/72] ext4: reinforce check of i_dtime when clearing high fields of uid and gid Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 05/72] ext4: allow DAX writeback for hole punch Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 06/72] cfq: fix starvation of asynchronous writes Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 07/72] pstore: Fix buffer overflow while write offset equal to buffer size Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 08/72] ipc: remove use of seq_printf return value Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 09/72] gpio: mpc8xxx: Correct irq handler function Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 10/72] regulator: tps65910: Work around silicon erratum SWCZ010 Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 11/72] mmc: block: don't use CMD23 with very old MMC cards Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 12/72] pstore/core: drop cmpxchg based updates Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 13/72] pstore/ram: Use memcpy_toio instead of memcpy Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 14/72] pstore/ram: Use memcpy_fromio() to save old buffer Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 15/72] dm: mark request_queue dead before destroying the DM device Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 16/72] powerpc/vdso64: Use double word compare on pointers Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 17/72] powerpc/powernv: Use CPU-endian PEST in pnv_pci_dump_p7ioc_diag_data() Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 18/72] powerpc/64: Fix incorrect return value from __copy_tofrom_user Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 19/72] powerpc/pseries: Fix stack corruption in htpe code Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 20/72] zfcp: fix fc_host port_type with NPIV Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 21/72] zfcp: fix ELS/GS request&response length for hardware data router Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 22/72] zfcp: close window with unblocked rport during rport gone Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 23/72] zfcp: retain trace level for SCSI and HBA FSF response records Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 24/72] zfcp: restore: Dont use 0 to indicate invalid LUN in rec trace Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 25/72] zfcp: trace on request for open and close of WKA port Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 26/72] zfcp: restore tracing of handle for port and LUN with HBA records Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 27/72] zfcp: fix D_ID field with actual value on tracing SAN responses Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 28/72] zfcp: fix payload trace length for SAN request&response Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 29/72] zfcp: trace full payload of all SAN records (req,resp,iels) Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 30/72] scsi: zfcp: spin_lock_irqsave() is not nestable Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 31/72] fbdev/efifb: Fix 16 color palette entry calculation Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 32/72] mb86a20s: fix the locking logic Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 33/72] mb86a20s: fix demod settings Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 34/72] cx231xx: don't return error on success Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 35/72] cx231xx: fix GPIOs for Pixelview SBTVD hybrid Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 36/72] MIPS: ptrace: Fix regs_return_value for kernel context Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 37/72] Input: elantech - force needed quirks on Fujitsu H760 Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 38/72] Input: elantech - add Fujitsu Lifebook E556 to force crc_enabled Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 39/72] NFSv4: Open state recovery must account for file permission changes Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 40/72] scsi: Fix use-after-free Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 41/72] metag: Only define atomic_dec_if_positive conditionally Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 42/72] compiler: Allow 1- and 2-byte smp_load_acquire() and smp_store_release() Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 43/72] ipc/sem.c: fix complex_count vs. simple op race Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 44/72] arc: don't leak bits of kernel stack into coredump Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 45/72] fs/super.c: fix race between freeze_super() and thaw_super() Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 46/72] cifs: Limit the overall credit acquired Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 47/72] Clarify locking of cifs file and tcon structures and make more granular Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 48/72] Display number of credits available Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 49/72] Set previous session id correctly on SMB3 reconnect Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 50/72] SMB3: GUIDs should be constructed as random but valid uuids Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 51/72] Do not send SMB3 SET_INFO request if nothing is changing Jiri Slaby
2016-11-07 13:04 ` [PATCH 3.12 52/72] net/mlx4_core: Allow resetting VF admin mac to zero Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 53/72] isofs: Do not return EACCES for unknown filesystems Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 54/72] mmc: core: Annotate cmd_hdr as __le32 Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 55/72] ubifs: Fix xattr_names length in exit paths Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 56/72] drm/radeon: narrow asic_init for virtualization Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 57/72] drm/radeon/si/dpm: fix phase shedding setup Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 58/72] drm/radeon: change vblank_time's calculation method to reduce computational error Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 59/72] mm/hugetlb: fix memory offline with hugepage size > memory block size Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 60/72] introduce NETIF_F_GSO_ENCAP_ALL helper mask Jiri Slaby
2016-11-07 13:05 ` [PATCH 3.12 61/72] tunnels: Remove encapsulation offloads on decap Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 62/72] powerpc/eeh: Null check uses of eeh_pe_bus_get Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 63/72] genirq/generic_chip: Add irq_unmap callback Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 64/72] uio: fix dmem_region_start computation Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 65/72] crypto: gcm - Fix IV buffer size in crypto_gcm_setkey Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 66/72] hwrng: omap - Only fail if pm_runtime_get_sync returns < 0 Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 67/72] perf symbols: Fixup symbol sizes before picking best ones Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 68/72] powerpc/nvram: Fix an incorrect partition merge Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()" Jiri Slaby
2016-11-07 16:45 ` Linus Torvalds
2016-11-08 10:36 ` Greg KH [this message]
2016-11-07 13:30 ` [PATCH 3.12 70/72] i2c: core: fix NULL pointer dereference under race condition Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 71/72] scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer() Jiri Slaby
2016-11-07 13:30 ` [PATCH 3.12 72/72] usb: hub: change CLEAR_FEATURE to SET_FEATURE Jiri Slaby
2016-11-07 17:16 ` [PATCH 3.12 00/72] 3.12.67-stable review Guenter Roeck
2016-11-08 15:40 ` Jiri Slaby
2016-11-09 4:14 ` Guenter Roeck
2016-11-10 18:50 ` Jiri Slaby
2016-11-07 18:34 ` Shuah Khan
2016-11-10 18:51 ` Jiri Slaby
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