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)
mount$9p_fd(0x0, 0x0, 0x0, 0x1000, &(0x7f0000000640)=ANY=[])
[ 112.317139][ T4638] Bluetooth: hci0: command tx timeout
[ 112.528614][ T5319] FAULT_INJECTION: forcing a failure.
[ 112.528614][ T5319] name failslab, interval 1, probability 100, space 0, times 1
[ 112.534563][ T1240] FAULT_INJECTION: forcing a failure.
[ 112.534563][ T1240] name failslab, interval 1, probability 100, space 0, times 1
[ 112.541108][ T5312] FAULT_INJECTION: forcing a failure.
[ 112.541108][ T5312] name failslab, interval 1, probability 100, space 0, times 1
[ 112.547133][ T1240] CPU: 0 UID: 0 PID: 1240 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full)
[ 112.547153][ T1240] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 112.547161][ T1240] Workqueue: events nsim_fib_event_work
[ 112.547269][ T1240] Call Trace:
[ 112.547274][ T1240]
[ 112.547280][ T1240] dump_stack_lvl+0xe8/0x150
[ 112.547299][ T1240] should_fail_ex+0x40c/0x560
[ 112.547314][ T1240] should_failslab+0xa8/0x100
[ 112.547331][ T1240] __kmalloc_cache_noprof+0xa8/0x660
[ 112.547344][ T1240] ? stack_depot_save_flags+0x33/0x800
[ 112.547357][ T1240] ? nsim_fib_event+0xf37/0xa390
[ 112.547368][ T1240] ? nsim_fib_event+0xf37/0xa390
[ 112.547384][ T1240] nsim_fib_event+0xf37/0xa390
[ 112.547396][ T1240] ? worker_thread+0xa47/0xfb0
[ 112.547408][ T1240] ? kthread+0x388/0x470
[ 112.547437][ T1240] ? __pfx_nsim_fib_event+0x10/0x10
[ 112.547459][ T1240] ? kasan_quarantine_put+0xbb/0x1f0
[ 112.547479][ T1240] nsim_fib_event_work+0x244/0x3b0
[ 112.547493][ T1240] ? __pfx_nsim_fib_event_work+0x10/0x10
[ 112.547507][ T1240] ? rcu_is_watching+0x15/0xb0
[ 112.547525][ T1240] ? process_scheduled_works+0xa20/0x14e0
[ 112.547537][ T1240] process_scheduled_works+0xa8e/0x14e0
[ 112.547565][ T1240] ? __pfx_process_scheduled_works+0x10/0x10
[ 112.547582][ T1240] ? assign_work+0x3cf/0x5d0
[ 112.547596][ T1240] worker_thread+0xa47/0xfb0
[ 112.547618][ T1240] ? __kthread_parkme+0x71/0x1f0
[ 112.547637][ T1240] kthread+0x388/0x470
[ 112.547653][ T1240] ? __pfx_worker_thread+0x10/0x10
[ 112.547663][ T1240] ? __pfx_kthread+0x10/0x10
[ 112.547679][ T1240] ret_from_fork+0x514/0xb70
[ 112.547695][ T1240] ? __pfx_ret_from_fork+0x10/0x10
[ 112.547711][ T1240] ? __switch_to+0xc89/0x1420
[ 112.547725][ T1240] ? __pfx_kthread+0x10/0x10
[ 112.547741][ T1240] ret_from_fork_asm+0x1a/0x30
[ 112.547777][ T1240]
[ 112.548804][ T5312] CPU: 0 UID: 0 PID: 5312 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full)
[ 112.548819][ T5312] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 112.548826][ T5312] Workqueue: events drm_fb_helper_damage_work
[ 112.548848][ T5312] Call Trace:
[ 112.548853][ T5312]
[ 112.548858][ T5312] dump_stack_lvl+0xe8/0x150
[ 112.548876][ T5312] should_fail_ex+0x40c/0x560
[ 112.548892][ T5312] should_failslab+0xa8/0x100
[ 112.548908][ T5312] __kmalloc_cache_noprof+0xa8/0x660
[ 112.548921][ T5312] ? drm_atomic_commit_alloc+0xa9/0x100
[ 112.548932][ T5312] ? drm_atomic_commit_alloc+0xa9/0x100
[ 112.548945][ T5312] drm_atomic_commit_alloc+0xa9/0x100
[ 112.548957][ T5312] drm_atomic_helper_dirtyfb+0x129/0xfd0
[ 112.548975][ T5312] ? __lock_acquire+0x683/0x2cf0
[ 112.548994][ T5312] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10
[ 112.549018][ T5312] ? do_raw_spin_lock+0x12b/0x2f0
[ 112.549037][ T5312] drm_fbdev_shmem_helper_fb_dirty+0x160/0x310
[ 112.549056][ T5312] drm_fb_helper_damage_work+0x84c/0xf20
[ 112.549079][ T5312] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 112.549105][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.549121][ T5312] ? rcu_is_watching+0x15/0xb0
[ 112.549140][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.549151][ T5312] process_scheduled_works+0xa8e/0x14e0
[ 112.549178][ T5312] ? __pfx_process_scheduled_works+0x10/0x10
[ 112.549193][ T5312] ? assign_work+0x3cf/0x5d0
[ 112.549207][ T5312] worker_thread+0xa47/0xfb0
[ 112.549229][ T5312] ? __kthread_parkme+0x71/0x1f0
[ 112.549278][ T5312] kthread+0x388/0x470
[ 112.549294][ T5312] ? __pfx_worker_thread+0x10/0x10
[ 112.549305][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.549321][ T5312] ret_from_fork+0x514/0xb70
[ 112.549339][ T5312] ? __pfx_ret_from_fork+0x10/0x10
[ 112.549373][ T5312] ? __switch_to+0xc89/0x1420
[ 112.549383][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.549393][ T5312] ret_from_fork_asm+0x1a/0x30
[ 112.549417][ T5312]
[ 112.549501][ T5312] ------------[ cut here ]------------
[ 112.722939][ T5312] virtio-pci 0000:00:01.0: [drm] Dirty helper failed: ret=-12
[ 112.726581][ T5312] WARNING: drivers/gpu/drm/drm_fbdev_shmem.c:118 at drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310, CPU#0: kworker/0:5/5312
[ 112.732062][ T5312] Modules linked in:
[ 112.733903][ T5312] CPU: 0 UID: 0 PID: 5312 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full)
[ 112.737940][ T5312] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 112.742596][ T5312] Workqueue: events drm_fb_helper_damage_work
[ 112.745501][ T5312] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 112.748544][ T5312] Code: 35 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 0a 59 a4 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
[ 112.758125][ T5312] RSP: 0018:ffffc9000f4bf8b8 EFLAGS: 00010246
[ 112.760822][ T5312] RAX: 1ffff11003f1001a RBX: 00000000fffffff4 RCX: 00000000fffffff4
[ 112.764843][ T5312] RDX: ffff88801f643e80 RSI: ffffffff8c57c800 RDI: ffffffff9063d5e0
[ 112.768764][ T5312] RBP: ffff88801d350008 R08: 0000000000000dc0 R09: 00000000ffffffff
[ 112.773097][ T5312] R10: dffffc0000000000 R11: fffffbfff1d94963 R12: ffff88801f643e80
[ 112.777478][ T5312] R13: dffffc0000000000 R14: ffffffff8c57c800 R15: ffff88801f8800d0
[ 112.781513][ T5312] FS: 0000000000000000(0000) GS:ffff88808c53e000(0000) knlGS:0000000000000000
[ 112.785727][ T5312] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 112.788978][ T5312] CR2: 00007f1e3aa1ba30 CR3: 0000000011d50000 CR4: 0000000000352ef0
[ 112.793007][ T5312] Call Trace:
[ 112.795149][ T5312]
[ 112.796487][ T5312] drm_fb_helper_damage_work+0x84c/0xf20
[ 112.799311][ T5312] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 112.802213][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.805285][ T5312] ? rcu_is_watching+0x15/0xb0
[ 112.807372][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.809762][ T5312] process_scheduled_works+0xa8e/0x14e0
[ 112.812371][ T5312] ? __pfx_process_scheduled_works+0x10/0x10
[ 112.815268][ T5312] ? assign_work+0x3cf/0x5d0
[ 112.817411][ T5312] worker_thread+0xa47/0xfb0
[ 112.819478][ T5312] ? __kthread_parkme+0x71/0x1f0
[ 112.821710][ T5312] kthread+0x388/0x470
[ 112.823478][ T5312] ? __pfx_worker_thread+0x10/0x10
[ 112.826023][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.828290][ T5312] ret_from_fork+0x514/0xb70
[ 112.830313][ T5312] ? __pfx_ret_from_fork+0x10/0x10
[ 112.832609][ T5312] ? __switch_to+0xc89/0x1420
[ 112.834778][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.836805][ T5312] ret_from_fork_asm+0x1a/0x30
[ 112.839008][ T5312]
[ 112.840403][ T5312] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 112.843572][ T5312] CPU: 0 UID: 0 PID: 5312 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full)
[ 112.847921][ T5312] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 112.852244][ T5312] Workqueue: events drm_fb_helper_damage_work
[ 112.855096][ T5312] Call Trace:
[ 112.856709][ T5312]
[ 112.858240][ T5312] vpanic+0x56c/0xa60
[ 112.860228][ T5312] ? __pfx__printk+0x10/0x10
[ 112.862369][ T5312] ? __pfx_vpanic+0x10/0x10
[ 112.864492][ T5312] ? is_bpf_text_address+0x292/0x2b0
[ 112.866858][ T5312] ? is_bpf_text_address+0x26/0x2b0
[ 112.869280][ T5312] panic+0xc5/0xd0
[ 112.871046][ T5312] ? __pfx_panic+0x10/0x10
[ 112.873050][ T5312] ? ret_from_fork_asm+0x1a/0x30
[ 112.875217][ T5312] __warn+0x315/0x4c0
[ 112.876882][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 112.879470][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 112.882232][ T5312] __report_bug+0x276/0x570
[ 112.884392][ T5312] ? drm_modeset_acquire_fini+0x27/0x180
[ 112.887068][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310
[ 112.889951][ T5312] ? __pfx___report_bug+0x10/0x10
[ 112.892152][ T5312] ? drm_atomic_helper_dirtyfb+0xf27/0xfd0
[ 112.894745][ T5312] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10
[ 112.897447][ T5312] report_bug_entry+0x19a/0x290
[ 112.899658][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 112.902563][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x28d/0x310
[ 112.905516][ T5312] handle_bug+0xce/0x200
[ 112.907360][ T5312] exc_invalid_op+0x1a/0x50
[ 112.909275][ T5312] asm_exc_invalid_op+0x1a/0x20
[ 112.911277][ T5312] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310
[ 112.914079][ T5312] Code: 35 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 0a 59 a4 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
[ 112.922581][ T5312] RSP: 0018:ffffc9000f4bf8b8 EFLAGS: 00010246
[ 112.925182][ T5312] RAX: 1ffff11003f1001a RBX: 00000000fffffff4 RCX: 00000000fffffff4
[ 112.928700][ T5312] RDX: ffff88801f643e80 RSI: ffffffff8c57c800 RDI: ffffffff9063d5e0
[ 112.932370][ T5312] RBP: ffff88801d350008 R08: 0000000000000dc0 R09: 00000000ffffffff
[ 112.936028][ T5312] R10: dffffc0000000000 R11: fffffbfff1d94963 R12: ffff88801f643e80
[ 112.939468][ T5312] R13: dffffc0000000000 R14: ffffffff8c57c800 R15: ffff88801f8800d0
[ 112.942732][ T5312] ? drm_fbdev_shmem_helper_fb_dirty+0x260/0x310
[ 112.945543][ T5312] drm_fb_helper_damage_work+0x84c/0xf20
[ 112.948128][ T5312] ? __pfx_drm_fb_helper_damage_work+0x10/0x10
[ 112.950978][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.953368][ T5312] ? rcu_is_watching+0x15/0xb0
[ 112.955472][ T5312] ? process_scheduled_works+0xa20/0x14e0
[ 112.957990][ T5312] process_scheduled_works+0xa8e/0x14e0
[ 112.960541][ T5312] ? __pfx_process_scheduled_works+0x10/0x10
[ 112.963100][ T5312] ? assign_work+0x3cf/0x5d0
[ 112.965080][ T5312] worker_thread+0xa47/0xfb0
[ 112.967097][ T5312] ? __kthread_parkme+0x71/0x1f0
[ 112.969169][ T5312] kthread+0x388/0x470
[ 112.971022][ T5312] ? __pfx_worker_thread+0x10/0x10
[ 112.973411][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.975555][ T5312] ret_from_fork+0x514/0xb70
[ 112.977640][ T5312] ? __pfx_ret_from_fork+0x10/0x10
[ 112.979945][ T5312] ? __switch_to+0xc89/0x1420
[ 112.982174][ T5312] ? __pfx_kthread+0x10/0x10
[ 112.984223][ T5312] ret_from_fork_asm+0x1a/0x30
[ 112.986427][ T5312]
[ 112.988277][ T5312] Kernel Offset: disabled
[ 112.990269][ T5312] Rebooting in 86400 seconds..