[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   40.029956] audit: type=1800 audit(1547665837.749:25): pid=7883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   40.050605] audit: type=1800 audit(1547665837.759:26): pid=7883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   40.080022] audit: type=1800 audit(1547665837.759:27): pid=7883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.10.59' (ECDSA) to the list of known hosts.
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syzkaller login: [   48.453107] WARNING: CPU: 0 PID: 8042 at drivers/media/common/videobuf2/videobuf2-core.c:1852 __vb2_queue_cancel+0x8f1/0xd30
[   48.464625] Kernel panic - not syncing: panic_on_warn set ...
[   48.470520] CPU: 0 PID: 8042 Comm: syz-executor289 Not tainted 5.0.0-rc2+ #29
[   48.477793] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.487155] Call Trace:
[   48.489760]  dump_stack+0x1db/0x2d0
[   48.493397]  ? dump_stack_print_info.cold+0x20/0x20
[   48.498428]  ? __vb2_queue_cancel+0x880/0xd30
[   48.502939]  panic+0x2cb/0x65c
[   48.506138]  ? add_taint.cold+0x16/0x16
[   48.510126]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.514625]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   48.520164]  ? __probe_kernel_read+0x1f4/0x250
[   48.524764]  ? __warn.cold+0x5/0x48
[   48.528394]  ? __warn+0xe8/0x1d0
[   48.531775]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.536282]  __warn.cold+0x20/0x48
[   48.539827]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.544326]  report_bug+0x263/0x2b0
[   48.547966]  do_error_trap+0x11b/0x200
[   48.551862]  do_invalid_op+0x37/0x50
[   48.555579]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.560077]  invalid_op+0x14/0x20
[   48.563537] RIP: 0010:__vb2_queue_cancel+0x8f1/0xd30
[   48.568639] 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
[   48.587545] RSP: 0018:ffff88808a727908 EFLAGS: 00010293
[   48.592913] RAX: ffff88808cc24640 RBX: ffff88808a727a20 RCX: ffffffff85425c42
[   48.600191] RDX: 0000000000000000 RSI: ffffffff85426371 RDI: 0000000000000005
[   48.607466] RBP: ffff88808a727a48 R08: ffff88808cc24640 R09: ffffed1013c64ce9
[   48.614749] R10: ffffed1013c64ce8 R11: ffff88809e326747 R12: ffff88809e326744
[   48.622030] R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88809e326500
[   48.629339]  ? __vb2_queue_cancel+0x1c2/0xd30
[   48.633844]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.638382]  ? __vb2_queue_cancel+0x8f1/0xd30
[   48.642924]  ? kasan_check_read+0x11/0x20
[   48.647076]  ? do_raw_spin_unlock+0xa0/0x330
[   48.651500]  ? vb2_buffer_done+0xc90/0xc90
[   48.655754]  ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[   48.660865]  ? kasan_check_write+0x14/0x20
[   48.665106]  ? wake_up_q+0xaa/0x100
[   48.668754]  ? __mutex_unlock_slowpath+0x420/0x870
[   48.673698]  vb2_core_streamoff+0x60/0x140
[   48.677960]  __vb2_cleanup_fileio+0x78/0x170
[   48.682386]  vb2_core_queue_release+0x20/0x80
[   48.686885]  _vb2_fop_release+0x1cf/0x2a0
[   48.691050]  vb2_fop_release+0x75/0xc0
[   48.694942]  vivid_fop_release+0x18e/0x430
[   48.699185]  ? vivid_remove+0x460/0x460
[   48.703169]  v4l2_release+0x224/0x3a0
[   48.706979]  __fput+0x3c5/0xb10
[   48.710264]  ? dev_debug_store+0x150/0x150
[   48.714505]  ? get_max_files+0x20/0x20
[   48.718390]  ? task_work_run+0x1bb/0x2b0
[   48.722458]  ? trace_hardirqs_off_caller+0x300/0x300
[   48.728051]  ? do_raw_spin_trylock+0x270/0x270
[   48.732646]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   48.738189]  ____fput+0x16/0x20
[   48.741474]  task_work_run+0x1f4/0x2b0
[   48.745370]  ? task_work_cancel+0x2c0/0x2c0
[   48.749695]  ? __close_fd+0x25f/0x3d0
[   48.753511]  ? do_fast_syscall_32+0x13b/0xf98
[   48.758041]  exit_to_usermode_loop+0x32a/0x3b0
[   48.762642]  ? entry_SYSENTER_compat+0x70/0x7f
[   48.767227]  ? syscall_trace_enter+0x12a0/0x12a0
[   48.771987]  ? __do_page_fault+0x3f1/0xd60
[   48.776234]  do_fast_syscall_32+0xc97/0xf98
[   48.780567]  ? do_int80_syscall_32+0x880/0x880
[   48.785151]  ? trace_hardirqs_off+0x310/0x310
[   48.789654]  ? syscall_return_slowpath+0x3b0/0x5f0
[   48.794595]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   48.800136]  ? prepare_exit_to_usermode+0x232/0x3b0
[   48.805158]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   48.810927]  entry_SYSENTER_compat+0x70/0x7f
[   48.815349] RIP: 0023:0xf7f65869
[   48.818726] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
[   48.837639] RSP: 002b:00000000ffb3f3ec EFLAGS: 00000246 ORIG_RAX: 0000000000000006
[   48.845385] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000020000000
[   48.852658] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 000000002000004c
[   48.859930] RBP: 00000000ffb3f448 R08: 0000000000000000 R09: 0000000000000000
[   48.867202] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   48.874469] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   48.882930] Kernel Offset: disabled
[   48.886601] Rebooting in 86400 seconds..