From: syzbot <syzbot+ee7ecfcd0e3f185e835a@syzkaller.appspotmail.com>
To: hokage.newbie@gmail.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [kernel?] linux-next test error: WARNING: locking bug in change_page_attr_set_clr
Date: Tue, 21 Jul 2026 07:18:03 -0700 [thread overview]
Message-ID: <6a5f7f9b.83245ca4.2d5e11.0004.GAE@google.com> (raw)
In-Reply-To: <CABWoTMsoHK3wOK2bNXEpWdqU5SxE2WcmdTDnJN3V5jybKSNLpQ@mail.gmail.com>
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
32][ T1] software IO TLB: mapped [mem 0x00000000b4400000-0x00000000b8400000] (64MB)
[ 4.888102][ T1] ACPI: bus type thunderbolt registered
[ 4.903297][ T60] kworker/u8:4 (60) used greatest stack depth: 27872 bytes left
[ 4.904101][ T1] RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer
[ 4.944864][ T1] kvm_amd: CPU 1 isn't AMD or Hygon
[ 4.951234][ T1] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 4.965570][ T1] clocksource: Switched to clocksource tsc
[ 4.982264][ T71] kworker/u8:1 (71) used greatest stack depth: 27488 bytes left
[ 5.006653][ T1] Initialise system trusted keyrings
[ 5.014294][ T1] workingset: timestamp_bits=40 (anon: 35) max_order=21 bucket_order=0 (anon: 0)
[ 5.031422][ T1] DLM installed
[ 5.041336][ T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 5.055213][ T1] NFS: Registering the id_resolver key type
[ 5.061906][ T1] Key type id_resolver registered
[ 5.068568][ T1] Key type id_legacy registered
[ 5.074143][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 5.082519][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 5.094470][ T1] smbdirect: subsystem loading...
[ 5.104567][ T1] smbdirect: subsystem loaded
[ 5.125689][ T1] Key type cifs.spnego registered
[ 5.132028][ T1] Key type cifs.idmap registered
[ 5.141159][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 5.147855][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 5.155971][ T1] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 5.166871][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 5.173528][ T1] QNX4 filesystem 0.2.3 registered.
[ 5.179103][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 5.186758][ T1] fuse: init (API version 7.45)
[ 5.196303][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 5.206125][ T1] orangefs_init: module version upstream loaded
[ 5.214242][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 5.237090][ T1] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, no debug enabled
[ 5.255483][ T1] 9p: Installing v9fs 9p2000 file system support
[ 5.263388][ T1] NILFS version 2 loaded
[ 5.267905][ T1] befs: version: 0.9.3
[ 5.272893][ T1] ocfs2: Registered cluster interface o2cb
[ 5.280833][ T1] ocfs2: Registered cluster interface user
[ 5.289020][ T1] OCFS2 User DLM kernel interface loaded
[ 5.314195][ T1] gfs2: GFS2 installed
[ 5.331699][ T1] ceph: loaded (mds proto 32)
[ 5.345000][ T1] NET: Registered PF_ALG protocol family
[ 5.351259][ T1] async_tx: api initialized (async)
[ 5.357277][ T1] Key type asymmetric registered
[ 5.362670][ T1] Asymmetric key parser 'x509' registered
[ 5.369174][ T1] Asymmetric key parser 'pkcs8' registered
[ 5.375663][ T1] Key type pkcs7_test registered
[ 5.382339][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 5.394050][ T1] io scheduler mq-deadline registered
[ 5.400204][ T1] io scheduler kyber registered
[ 5.405853][ T1] io scheduler bfq registered
[ 5.412399][ T1] raid6: skipped pq benchmark and selected avx2x4
[ 5.436280][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 5.448299][ T1] ACPI: button: Power Button [PWRF]
[ 5.456737][ T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[ 5.466430][ T1] ACPI: button: Sleep Button [SLPF]
[ 5.487530][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 5.514416][ T10] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 5.520919][ T10] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 5.557828][ T10] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 5.563680][ T10] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 5.602085][ T10] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 5.608039][ T10] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 5.634149][ T10] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 5.700761][ T228] kworker/u8:3 (228) used greatest stack depth: 27168 bytes left
[ 6.180975][ T1] N_HDLC line discipline registered with maxframe=4096
[ 6.191915][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 6.205395][ T1] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 6.228327][ T1] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 6.250174][ T1] 00:04: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 6.272648][ T1] 00:05: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 6.304382][ T1] Non-volatile memory driver v1.3
[ 6.342173][ T1] usbcore: registered new interface driver xillyusb
[ 6.355000][ T1] ACPI: bus type drm_connector registered
[ 6.368742][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 6.381964][ T1] ------------[ cut here ]------------
[ 6.389957][ T1] [PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup
[ 6.390002][ T1] WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6a/0x1e60, CPU#1: swapper/0/1
[ 6.413950][ T1] Modules linked in:
[ 6.417986][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 6.428539][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 6.440056][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 6.447079][ T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 3d fe 9f fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d9 f9 31 fc 49 bd 00 00 00 00 00 fc ff df
[ 6.469289][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 6.476012][ T1] RAX: 1ffff11004e60208 RBX: dffffc0000000000 RCX: ffff88801d6fddc0
[ 6.484649][ T1] RDX: ffff888026f33b20 RSI: 0000000000000023 RDI: ffffffff90a4f5e0
[ 6.493076][ T1] RBP: 0000000000000023 R08: ffff88802442cc7b R09: 1ffff1100488598f
[ 6.502490][ T1] R10: dffffc0000000000 R11: ffffed1004885990 R12: dffffc0000000000
[ 6.511445][ T1] R13: ffffffff90a4f5e0 R14: ffff888027301040 R15: ffff888027301030
[ 6.520347][ T1] FS: 0000000000000000(0000) GS:ffff8881249f2000(0000) knlGS:0000000000000000
[ 6.530605][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.537677][ T1] CR2: 0000000000000000 CR3: 000000000ed46000 CR4: 00000000003526f0
[ 6.546098][ T1] Call Trace:
[ 6.549499][ T1] <TASK>
[ 6.552592][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 6.559084][ T1] drm_dev_register+0x7c/0xd80
[ 6.564258][ T1] vkms_create+0x40d/0x4f0
[ 6.569092][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.574598][ T1] vkms_init+0x57/0x80
[ 6.579550][ T1] do_one_initcall+0x250/0x870
[ 6.584760][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.589758][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 6.595223][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.600257][ T1] ? __pfx___schedule+0x10/0x10
[ 6.605207][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.611281][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.617176][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.622454][ T1] ? irqentry_exit+0x218/0x8f0
[ 6.627770][ T1] ? trace_irq_disable+0x3b/0x140
[ 6.633035][ T1] ? strlen+0x32/0x70
[ 6.637533][ T1] ? next_arg+0x4a0/0x5e0
[ 6.642383][ T1] ? parameq+0x14d/0x170
[ 6.647198][ T1] ? parse_args+0x9c3/0xad0
[ 6.651995][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.657578][ T1] do_initcall_level+0x10a/0x1a0
[ 6.662915][ T1] ? kernel_init+0x22/0x1d0
[ 6.667762][ T1] do_initcalls+0x59/0xa0
[ 6.672657][ T1] kernel_init_freeable+0x29d/0x3e0
[ 6.678496][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.684003][ T1] kernel_init+0x22/0x1d0
[ 6.688963][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.694339][ T1] ret_from_fork+0x514/0xb70
[ 6.699211][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 6.705620][ T1] ? __switch_to+0xc89/0x1420
[ 6.710526][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.715879][ T1] ret_from_fork_asm+0x1a/0x30
[ 6.721049][ T1] </TASK>
[ 6.724384][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 6.725855][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 6.725855][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 6.725855][ T1] Call Trace:
[ 6.725855][ T1] <TASK>
[ 6.725855][ T1] vpanic+0x56c/0xa60
[ 6.725855][ T1] ? __pfx__printk+0x10/0x10
[ 6.725855][ T1] ? __pfx_vpanic+0x10/0x10
[ 6.725855][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 6.725855][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 6.725855][ T1] panic+0xc5/0xd0
[ 6.725855][ T1] ? __pfx_panic+0x10/0x10
[ 6.725855][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 6.725855][ T1] __warn+0x315/0x4c0
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] __report_bug+0x276/0x570
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] ? __pfx___report_bug+0x10/0x10
[ 6.725855][ T1] ? __pfx_inode_set_ctime_to_ts+0x10/0x10
[ 6.725855][ T1] ? ktime_get_coarse_real_ts64_mg+0x59/0x1e0
[ 6.725855][ T1] ? seqcount_lockdep_reader_access+0xea/0x100
[ 6.725855][ T1] ? ktime_get_coarse_real_ts64_mg+0x1c5/0x1e0
[ 6.725855][ T1] report_bug_entry+0x19a/0x290
[ 6.725855][ T1] ? drm_mode_config_validate+0x1cab/0x1e60
[ 6.725855][ T1] ? drm_mode_config_validate+0x1cb0/0x1e60
[ 6.725855][ T1] handle_bug+0xce/0x200
[ 6.725855][ T1] exc_invalid_op+0x1a/0x50
[ 6.725855][ T1] asm_exc_invalid_op+0x1a/0x20
[ 6.725855][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 6.725855][ T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 3d fe 9f fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d9 f9 31 fc 49 bd 00 00 00 00 00 fc ff df
[ 6.725855][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 6.725855][ T1] RAX: 1ffff11004e60208 RBX: dffffc0000000000 RCX: ffff88801d6fddc0
[ 6.725855][ T1] RDX: ffff888026f33b20 RSI: 0000000000000023 RDI: ffffffff90a4f5e0
[ 6.725855][ T1] RBP: 0000000000000023 R08: ffff88802442cc7b R09: 1ffff1100488598f
[ 6.725855][ T1] R10: dffffc0000000000 R11: ffffed1004885990 R12: dffffc0000000000
[ 6.725855][ T1] R13: ffffffff90a4f5e0 R14: ffff888027301040 R15: ffff888027301030
[ 6.725855][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 6.725855][ T1] drm_dev_register+0x7c/0xd80
[ 6.725855][ T1] vkms_create+0x40d/0x4f0
[ 6.725855][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.725855][ T1] vkms_init+0x57/0x80
[ 6.725855][ T1] do_one_initcall+0x250/0x870
[ 6.725855][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.725855][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] ? __pfx___schedule+0x10/0x10
[ 6.725855][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.725855][ T1] ? irqentry_exit+0x218/0x8f0
[ 6.725855][ T1] ? trace_irq_disable+0x3b/0x140
[ 6.725855][ T1] ? strlen+0x32/0x70
[ 6.725855][ T1] ? next_arg+0x4a0/0x5e0
[ 6.725855][ T1] ? parameq+0x14d/0x170
[ 6.725855][ T1] ? parse_args+0x9c3/0xad0
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] do_initcall_level+0x10a/0x1a0
[ 6.725855][ T1] ? kernel_init+0x22/0x1d0
[ 6.725855][ T1] do_initcalls+0x59/0xa0
[ 6.725855][ T1] kernel_init_freeable+0x29d/0x3e0
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] kernel_init+0x22/0x1d0
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] ret_from_fork+0x514/0xb70
[ 6.725855][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 6.725855][ T1] ? __switch_to+0xc89/0x1420
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] ret_from_fork_asm+0x1a/0x30
[ 6.725855][ T1] </TASK>
[ 6.725855][ T1] Kernel Offset: disabled
[ 6.725855][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2803433996=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at 7f27c57aff
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"7f27c57affd8bddc0f76bd42d53ecfc583fc548b\"
/usr/bin/ld: /tmp/cc4dEmS4.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=178be746580000
Tested on:
commit: 1a1757b7 Add linux-next specific files for 20260716
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
kernel config: https://syzkaller.appspot.com/x/.config?x=8d1a274c57796a86
dashboard link: https://syzkaller.appspot.com/bug?extid=ee7ecfcd0e3f185e835a
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Note: no patches were applied.
next parent reply other threads:[~2026-07-21 14:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CABWoTMsoHK3wOK2bNXEpWdqU5SxE2WcmdTDnJN3V5jybKSNLpQ@mail.gmail.com>
2026-07-21 14:18 ` syzbot [this message]
2026-07-20 16:59 [syzbot] [kernel?] linux-next test error: WARNING: locking bug in change_page_attr_set_clr syzbot
2026-07-21 2:24 ` Borislav Petkov
2026-07-21 10:35 ` Mike Rapoport
2026-07-21 12:39 ` Lorenzo Stoakes (ARM)
2026-07-21 13:53 ` Borislav Petkov
2026-07-21 14:03 ` Lorenzo Stoakes (ARM)
2026-07-21 15:05 ` Borislav Petkov
2026-07-21 15:45 ` Lorenzo Stoakes (ARM)
2026-07-21 14:10 ` Lorenzo Stoakes (ARM)
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