[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   43.256492] audit: type=1800 audit(1547662204.700:25): pid=7896 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   43.276194] audit: type=1800 audit(1547662204.710:26): pid=7896 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   43.303957] audit: type=1800 audit(1547662204.710:27): pid=7896 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts.
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syzkaller login: [   54.414205] WARNING: CPU: 1 PID: 8060 at drivers/media/common/videobuf2/videobuf2-core.c:1852 __vb2_queue_cancel+0x8f1/0xd30
[   54.425669] Kernel panic - not syncing: panic_on_warn set ...
[   54.431550] CPU: 1 PID: 8060 Comm: syz-executor901 Not tainted 5.0.0-rc2+ #29
[   54.438827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.448168] Call Trace:
[   54.450760]  dump_stack+0x1db/0x2d0
[   54.454392]  ? dump_stack_print_info.cold+0x20/0x20
[   54.459403]  ? __vb2_queue_cancel+0x880/0xd30
[   54.463888]  panic+0x2cb/0x65c
[   54.467068]  ? add_taint.cold+0x16/0x16
[   54.471034]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.475515]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   54.481038]  ? __probe_kernel_read+0x1f4/0x250
[   54.485610]  ? __warn.cold+0x5/0x48
[   54.489222]  ? __warn+0xe8/0x1d0
[   54.492578]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.497059]  __warn.cold+0x20/0x48
[   54.500586]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.505072]  report_bug+0x263/0x2b0
[   54.508694]  do_error_trap+0x11b/0x200
[   54.512589]  do_invalid_op+0x37/0x50
[   54.516306]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.520807]  invalid_op+0x14/0x20
[   54.524260] RIP: 0010:__vb2_queue_cancel+0x8f1/0xd30
[   54.529347] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 15 04 00 00 48 81 c4 18 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7f 9b 3f fc <0f> 0b 49 8d 87 28 02 00 00 48 89 85 d0 fe ff ff 48 c1 e8 03 42 0f
[   54.548243] RSP: 0018:ffff88808f1af938 EFLAGS: 00010293
[   54.553604] RAX: ffff888091f42480 RBX: ffff88808f1afa50 RCX: ffffffff85425c42
[   54.560872] RDX: 0000000000000000 RSI: ffffffff85426371 RDI: 0000000000000005
[   54.568140] RBP: ffff88808f1afa78 R08: ffff888091f42480 R09: ffffed10430e6ce1
[   54.575396] R10: ffffed10430e6ce0 R11: ffff888218736707 R12: ffff888218736704
[   54.582655] R13: dffffc0000000000 R14: 0000000000000002 R15: ffff8882187364c0
[   54.589930]  ? __vb2_queue_cancel+0x1c2/0xd30
[   54.594416]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.598903]  ? __vb2_queue_cancel+0x8f1/0xd30
[   54.603386]  ? kasan_check_read+0x11/0x20
[   54.607523]  ? do_raw_spin_unlock+0xa0/0x330
[   54.611922]  ? vb2_buffer_done+0xc90/0xc90
[   54.616146]  ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[   54.621249]  ? kasan_check_write+0x14/0x20
[   54.625475]  ? wake_up_q+0xaa/0x100
[   54.629104]  ? __mutex_unlock_slowpath+0x420/0x870
[   54.634043]  vb2_core_streamoff+0x60/0x140
[   54.638272]  __vb2_cleanup_fileio+0x78/0x170
[   54.642686]  vb2_core_queue_release+0x20/0x80
[   54.647175]  _vb2_fop_release+0x1cf/0x2a0
[   54.651336]  vb2_fop_release+0x75/0xc0
[   54.655228]  vivid_fop_release+0x18e/0x430
[   54.659451]  ? vivid_remove+0x460/0x460
[   54.663412]  v4l2_release+0x224/0x3a0
[   54.667205]  __fput+0x3c5/0xb10
[   54.670475]  ? dev_debug_store+0x150/0x150
[   54.674699]  ? get_max_files+0x20/0x20
[   54.678575]  ? task_work_run+0x1bb/0x2b0
[   54.682634]  ? trace_hardirqs_off_caller+0x300/0x300
[   54.687721]  ? do_raw_spin_trylock+0x270/0x270
[   54.692294]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   54.697831]  ____fput+0x16/0x20
[   54.701101]  task_work_run+0x1f4/0x2b0
[   54.704978]  ? task_work_cancel+0x2c0/0x2c0
[   54.709297]  ? __close_fd+0x25f/0x3d0
[   54.713095]  ? do_syscall_64+0x8c/0x800
[   54.717058]  exit_to_usermode_loop+0x32a/0x3b0
[   54.721646]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.727009]  ? syscall_trace_enter+0x12a0/0x12a0
[   54.731755]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   54.736501]  do_syscall_64+0x696/0x800
[   54.740378]  ? syscall_return_slowpath+0x5f0/0x5f0
[   54.745295]  ? prepare_exit_to_usermode+0x232/0x3b0
[   54.750315]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   54.755163]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.760345] RIP: 0033:0x400ef0
[   54.763527] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d dd 57 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00
[   54.782435] RSP: 002b:00007ffd5d72f298 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   54.790141] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
[   54.797404] RDX: 00000000000ca800 RSI: 0000000020000000 RDI: 0000000000000003
[   54.804662] RBP: 0000000000000000 R08: 000000000070f880 R09: 00000000004002e0
[   54.811936] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401e00
[   54.819201] R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000
[   54.827572] Kernel Offset: disabled
[   54.831245] Rebooting in 86400 seconds..