program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./debug\x00', &(0x7f0000000300)='debugfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./debug/failslab/task-filter\x00', 0x1, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./debug/failslab/probability\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='N', 0x1)
write(r1, &(0x7f0000000100)='100', 0x3)
lsetxattr$trusted_overlay_origin(0x0, &(0x7f00000001c0), &(0x7f0000000340), 0x2, 0x2)
mount$9p_fd(0x0, 0x0, 0x0, 0x1000, 0x0)
[ 75.630978][ T4644] Bluetooth: hci0: command tx timeout
[ 75.709035][ T9] FAULT_INJECTION: forcing a failure.
[ 75.709035][ T9] name failslab, interval 1, probability 100, space 0, times 1
[ 75.709079][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full)
[ 75.709091][ T9] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 75.709097][ T9] Workqueue: events drm_fb_helper_damage_work
[ 75.709259][ T9] Call Trace:
[ 75.709294][ T9]
[ 75.709349][ T9] dump_stack_lvl+0xe8/0x150
[ 75.709388][ T9] should_fail_ex+0x410/0x560
[ 75.709424][ T9] should_failslab+0xa8/0x100
[ 75.709450][ T9] __kmalloc_cache_noprof+0xa3/0x600
[ 75.709468][ T9] ? drm_atomic_commit_alloc+0xa9/0x100
[ 75.709501][ T9] ? drm_atomic_commit_alloc+0xa9/0x100
[ 75.709517][ T9] drm_atomic_commit_alloc+0xa9/0x100
[ 75.709541][ T9] drm_atomic_helper_dirtyfb+0x129/0xfd0
[ 75.709562][ T9] ? __lock_acquire+0x747/0x2de0
[ 75.709586][ T9] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10
[ 75.709613][ T9] ? do_raw_spin_lock+0x12b/0x2f0
[ 75.709645][ T9] drm_fbdev_shmem_helper_fb_dirty+0x160/0x310
[ 75.709665][ T9] drm_fb_helper_damage_work+0x84c/0xf20
[ 75.709722][ T9] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 75.709748][ T9] ? lock_acquire+0x115/0x350
[ 75.709765][ T9] ? rcu_is_watching+0x16/0xb0
[ 75.709781][ T9] ? process_scheduled_works+0x97a/0x1630
[ 75.709796][ T9] process_scheduled_works+0xc3d/0x1630
[ 75.709828][ T9] ? __pfx_process_scheduled_works+0x10/0x10
[ 75.709847][ T9] ? assign_work+0x3cf/0x5d0
[ 75.709864][ T9] worker_thread+0xa47/0xfb0
[ 75.709896][ T9] kthread+0x38b/0x480
[ 75.709908][ T9] ? __pfx_worker_thread+0x10/0x10
[ 75.709921][ T9] ? __pfx_kthread+0x10/0x10
[ 75.709932][ T9] ret_from_fork+0x514/0xb70
[ 75.709946][ T9] ? __pfx_ret_from_fork+0x10/0x10
[ 75.709957][ T9] ? __switch_to+0xc89/0x1420
[ 75.709976][ T9] ? __pfx_kthread+0x10/0x10
[ 75.709988][ T9] ret_from_fork_asm+0x1a/0x30
[ 75.710008][ T9]
[ 75.710410][ T55] FAULT_INJECTION: forcing a failure.
[ 75.710410][ T55] name failslab, interval 1, probability 100, space 0, times 1
[ 75.710427][ T55] CPU: 0 UID: 0 PID: 55 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full)
[ 75.710438][ T55] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 75.710445][ T55] Workqueue: events nsim_fib_event_work
[ 75.710561][ T55] Call Trace:
[ 75.710566][ T55]
[ 75.710572][ T55] dump_stack_lvl+0xe8/0x150
[ 75.710588][ T55] should_fail_ex+0x410/0x560
[ 75.710602][ T55] should_failslab+0xa8/0x100
[ 75.710622][ T55] __kmalloc_cache_noprof+0xa3/0x600
[ 75.710639][ T55] ? __lock_acquire+0x747/0x2de0
[ 75.710650][ T55] ? nsim_fib_event+0x4c8/0xa3a0
[ 75.710664][ T55] ? nsim_fib_event+0x4c8/0xa3a0
[ 75.710682][ T55] nsim_fib_event+0x4c8/0xa3a0
[ 75.710696][ T55] ? worker_thread+0xa47/0xfb0
[ 75.710709][ T55] ? kthread+0x38b/0x480
[ 75.710719][ T55] ? ret_from_fork+0x514/0xb70
[ 75.710729][ T55] ? ret_from_fork_asm+0x1a/0x30
[ 75.710760][ T55] ? __pfx_nsim_fib_event+0x10/0x10
[ 75.710782][ T55] ? kasan_quarantine_put+0xbb/0x1f0
[ 75.710808][ T55] nsim_fib_event_work+0x244/0x3b0
[ 75.710826][ T55] ? __pfx_nsim_fib_event_work+0x10/0x10
[ 75.710843][ T55] ? rcu_is_watching+0x16/0xb0
[ 75.710858][ T55] ? process_scheduled_works+0x97a/0x1630
[ 75.710873][ T55] process_scheduled_works+0xc3d/0x1630
[ 75.710904][ T55] ? __pfx_process_scheduled_works+0x10/0x10
[ 75.710923][ T55] ? assign_work+0x3cf/0x5d0
[ 75.710940][ T55] worker_thread+0xa47/0xfb0
[ 75.710963][ T55] ? __kthread_parkme+0x71/0x1f0
[ 75.710984][ T55] kthread+0x38b/0x480
[ 75.710995][ T55] ? __pfx_worker_thread+0x10/0x10
[ 75.711008][ T55] ? __pfx_kthread+0x10/0x10
[ 75.711019][ T55] ret_from_fork+0x514/0xb70
[ 75.711029][ T55] ? __pfx_ret_from_fork+0x10/0x10
[ 75.711039][ T55] ? __switch_to+0xc89/0x1420
[ 75.711056][ T55] ? __pfx_kthread+0x10/0x10
[ 75.711067][ T55] ret_from_fork_asm+0x1a/0x30
[ 75.711114][ T55]
[ 75.711605][ T9] ------------[ cut here ]------------
[ 75.711612][ T9] virtio-pci 0000:00:01.0: [drm] Dirty helper failed: ret=-12
[ 75.711627][ T9] WARNING: drivers/gpu/drm/drm_fbdev_shmem.c:118 at drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310, CPU#0: kworker/0:0/9
[ 75.902967][ T9] Modules linked in:
[ 75.904641][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full)
[ 75.908634][ T9] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 75.912712][ T9] Workqueue: events drm_fb_helper_damage_work
[ 75.915304][ T9] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 75.918461][ T9] Code: 28 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 da 3d 9a fc 4d 8b 27 48 89 df 4c 89 f6 4c 89 e2 8b 5c 24 04 89 d9 <67> 48 0f b9 3a 89 d8 e9 f7 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f
[ 75.926814][ T9] RSP: 0000:ffffc9000022f898 EFLAGS: 00010246
[ 75.929582][ T9] RAX: 1ffff11003a4e41a RBX: 00000000fffffff4 RCX: 00000000fffffff4
[ 75.932946][ T9] RDX: ffff88801f5dae80 RSI: ffffffff8c79d740 RDI: ffffffff908668d0
[ 75.936656][ T9] RBP: ffff88800029a008 R08: 0000000000000dc0 R09: 00000000ffffffff
[ 75.940482][ T9] R10: dffffc0000000000 R11: fffffbfff1dd61bf R12: ffff88801f5dae80
[ 75.944067][ T9] R13: dffffc0000000000 R14: ffffffff8c79d740 R15: ffff88801d2720d0
[ 75.947885][ T9] FS: 0000000000000000(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000
[ 75.951986][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 75.954784][ T9] CR2: 00007f1c1e1d1b00 CR3: 0000000043eeb000 CR4: 0000000000352ef0
[ 75.958342][ T9] Call Trace:
[ 75.959819][ T9]
[ 75.961068][ T9] drm_fb_helper_damage_work+0x84c/0xf20
[ 75.963477][ T9] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 75.966042][ T9] ? lock_acquire+0x115/0x350
[ 75.968057][ T9] ? rcu_is_watching+0x16/0xb0
[ 75.970335][ T9] ? process_scheduled_works+0x97a/0x1630
[ 75.972843][ T9] process_scheduled_works+0xc3d/0x1630
[ 75.975289][ T9] ? __pfx_process_scheduled_works+0x10/0x10
[ 75.977805][ T9] ? assign_work+0x3cf/0x5d0
[ 75.979890][ T9] worker_thread+0xa47/0xfb0
[ 75.982016][ T9] kthread+0x38b/0x480
[ 75.984022][ T9] ? __pfx_worker_thread+0x10/0x10
[ 75.986436][ T9] ? __pfx_kthread+0x10/0x10
[ 75.988604][ T9] ret_from_fork+0x514/0xb70
[ 75.990606][ T9] ? __pfx_ret_from_fork+0x10/0x10
[ 75.992799][ T9] ? __switch_to+0xc89/0x1420
[ 75.994907][ T9] ? __pfx_kthread+0x10/0x10
[ 75.997106][ T9] ret_from_fork_asm+0x1a/0x30
[ 75.999703][ T9]
[ 76.001114][ T9] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 76.004180][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full)
[ 76.008247][ T9] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 76.012919][ T9] Workqueue: events drm_fb_helper_damage_work
[ 76.015671][ T9] Call Trace:
[ 76.017167][ T9]
[ 76.018505][ T9] vpanic+0x56d/0xa60
[ 76.020285][ T9] ? __pfx__printk+0x10/0x10
[ 76.022247][ T9] ? __pfx_vpanic+0x10/0x10
[ 76.023944][ T9] ? is_bpf_text_address+0x292/0x2b0
[ 76.025751][ T9] ? is_bpf_text_address+0x26/0x2b0
[ 76.027536][ T9] panic+0xc5/0xd0
[ 76.028984][ T9] ? __pfx_panic+0x10/0x10
[ 76.030616][ T9] ? ret_from_fork_asm+0x1a/0x30
[ 76.032526][ T9] __warn+0x315/0x4c0
[ 76.034086][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 76.036526][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 76.039213][ T9] __report_bug+0x276/0x570
[ 76.041245][ T9] ? drm_modeset_acquire_fini+0x27/0x180
[ 76.043681][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 76.046512][ T9] ? __pfx___report_bug+0x10/0x10
[ 76.048822][ T9] ? drm_atomic_helper_dirtyfb+0xf27/0xfd0
[ 76.051465][ T9] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10
[ 76.054164][ T9] report_bug_entry+0x19b/0x290
[ 76.056296][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 76.059068][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x28d/0x310
[ 76.061951][ T9] handle_bug+0xce/0x200
[ 76.063901][ T9] exc_invalid_op+0x1a/0x50
[ 76.065922][ T9] asm_exc_invalid_op+0x1a/0x20
[ 76.068138][ T9] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 76.071211][ T9] Code: 28 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 da 3d 9a fc 4d 8b 27 48 89 df 4c 89 f6 4c 89 e2 8b 5c 24 04 89 d9 <67> 48 0f b9 3a 89 d8 e9 f7 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f
[ 76.080369][ T9] RSP: 0000:ffffc9000022f898 EFLAGS: 00010246
[ 76.083129][ T9] RAX: 1ffff11003a4e41a RBX: 00000000fffffff4 RCX: 00000000fffffff4
[ 76.086535][ T9] RDX: ffff88801f5dae80 RSI: ffffffff8c79d740 RDI: ffffffff908668d0
[ 76.089947][ T9] RBP: ffff88800029a008 R08: 0000000000000dc0 R09: 00000000ffffffff
[ 76.093383][ T9] R10: dffffc0000000000 R11: fffffbfff1dd61bf R12: ffff88801f5dae80
[ 76.096746][ T9] R13: dffffc0000000000 R14: ffffffff8c79d740 R15: ffff88801d2720d0
[ 76.100152][ T9] ? drm_fbdev_shmem_helper_fb_dirty+0x260/0x310
[ 76.102940][ T9] drm_fb_helper_damage_work+0x84c/0xf20
[ 76.105372][ T9] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 76.108042][ T9] ? lock_acquire+0x115/0x350
[ 76.110084][ T9] ? rcu_is_watching+0x16/0xb0
[ 76.112190][ T9] ? process_scheduled_works+0x97a/0x1630
[ 76.114632][ T9] process_scheduled_works+0xc3d/0x1630
[ 76.117052][ T9] ? __pfx_process_scheduled_works+0x10/0x10
[ 76.119437][ T9] ? assign_work+0x3cf/0x5d0
[ 76.121692][ T9] worker_thread+0xa47/0xfb0
[ 76.123781][ T9] kthread+0x38b/0x480
[ 76.125545][ T9] ? __pfx_worker_thread+0x10/0x10
[ 76.127629][ T9] ? __pfx_kthread+0x10/0x10
[ 76.129546][ T9] ret_from_fork+0x514/0xb70
[ 76.131459][ T9] ? __pfx_ret_from_fork+0x10/0x10
[ 76.133545][ T9] ? __switch_to+0xc89/0x1420
[ 76.135483][ T9] ? __pfx_kthread+0x10/0x10
[ 76.137492][ T9] ret_from_fork_asm+0x1a/0x30
[ 76.139668][ T9]
[ 76.141516][ T9] Kernel Offset: disabled
[ 76.143221][ T9] Rebooting in 86400 seconds..