[....] 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. executing program executing program executing program executing program executing program executing program 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..