Hello,
syzbot found the following issue on:
HEAD commit: 1b1934dbbdcf Merge tag 'docs-6.8-2' of git://git.lwn.net/l..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1029adbde80000
kernel config: https://syzkaller.appspot.com/x/.config?x=68ea41b98043e6e8
dashboard link: https://syzkaller.appspot.com/bug?extid=06fa1063cca8163ea541
compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-1b1934db.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/00b728a4f3de/vmlinux-1b1934db.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5a3fe8452d59/Image-1b1934db.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
BUG: scheduling while atomic: syz-executor.0/29225/0x00000002
Modules linked in:
CPU: 1 PID: 29225 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller-10085-g1b1934dbbdcf #0
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:291
show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:298
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x48/0x60 lib/dump_stack.c:106
dump_stack+0x18/0x24 lib/dump_stack.c:113
__schedule_bug+0x50/0x68 kernel/sched/core.c:5943
schedule_debug kernel/sched/core.c:5970 [inline]
__schedule+0x7f4/0x8a8 kernel/sched/core.c:6620
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x34/0xc8 kernel/sched/core.c:6817
schedule_timeout+0x8c/0x100 kernel/time/timer.c:2183
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_timeout+0x74/0x16c kernel/sched/completion.c:167
drm_atomic_helper_wait_for_flip_done+0x6c/0xc4 drivers/gpu/drm/drm_atomic_helper.c:1719
vkms_atomic_commit_tail+0x60/0xd0 drivers/gpu/drm/vkms/vkms_drv.c:81
commit_tail+0xa4/0x18c drivers/gpu/drm/drm_atomic_helper.c:1832
drm_atomic_helper_commit+0x164/0x178 drivers/gpu/drm/drm_atomic_helper.c:2072
drm_atomic_commit+0xa8/0xe0 drivers/gpu/drm/drm_atomic.c:1514
drm_client_modeset_commit_atomic+0x210/0x270 drivers/gpu/drm/drm_client_modeset.c:1051
drm_client_modeset_commit_locked+0x5c/0x188 drivers/gpu/drm/drm_client_modeset.c:1154
drm_client_modeset_commit+0x30/0x58 drivers/gpu/drm/drm_client_modeset.c:1180
__drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline]
__drm_fb_helper_restore_fbdev_mode_unlocked+0xa8/0xe8 drivers/gpu/drm/drm_fb_helper.c:230
drm_fb_helper_set_par+0x30/0x4c drivers/gpu/drm/drm_fb_helper.c:1344
fb_set_var+0x21c/0x488 drivers/video/fbdev/core/fbmem.c:312
fbcon_switch+0x214/0x4d0 drivers/video/fbdev/core/fbcon.c:2110
flush_scrollback drivers/tty/vt/vt.c:912 [inline]
csi_J+0x254/0x260 drivers/tty/vt/vt.c:1527
do_con_trol drivers/tty/vt/vt.c:2408 [inline]
do_con_write+0x1a30/0x1e2c drivers/tty/vt/vt.c:2905
con_write+0x18/0x68 drivers/tty/vt/vt.c:3251
gsmld_write+0x64/0xd0 drivers/tty/n_gsm.c:3724
iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
file_tty_write.constprop.0+0x134/0x28c drivers/tty/tty_io.c:1092
tty_write+0x14/0x20 drivers/tty/tty_io.c:1113
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x1dc/0x2f4 fs/read_write.c:590
ksys_write+0x70/0x104 fs/read_write.c:643
__do_sys_write fs/read_write.c:655 [inline]
__se_sys_write fs/read_write.c:652 [inline]
__arm64_sys_write+0x1c/0x28 fs/read_write.c:652
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595
BUG: scheduling while atomic: syz-executor.0/29225/0x00000000
Modules linked in:
CPU: 0 PID: 29225 Comm: syz-executor.0 Tainted: G W 6.7.0-syzkaller-10085-g1b1934dbbdcf #0
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:291
show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:298
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x48/0x60 lib/dump_stack.c:106
dump_stack+0x18/0x24 lib/dump_stack.c:113
__schedule_bug+0x50/0x68 kernel/sched/core.c:5943
schedule_debug kernel/sched/core.c:5970 [inline]
__schedule+0x7f4/0x8a8 kernel/sched/core.c:6620
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x34/0xc8 kernel/sched/core.c:6817
futex_wait_queue+0x70/0x9c kernel/futex/waitwake.c:370
__futex_wait+0xc8/0x15c kernel/futex/waitwake.c:669
futex_wait+0x84/0x108 kernel/futex/waitwake.c:697
do_futex+0xf8/0x1a0 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex kernel/futex/syscalls.c:160 [inline]
__arm64_sys_futex+0x7c/0x1a4 kernel/futex/syscalls.c:160
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595
---
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#syz dup: BUG: sleeping function called from invalid context in console_lock (2)