[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.582081] audit: type=1800 audit(1547662228.706:25): pid=7820 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.619466] audit: type=1800 audit(1547662228.706:26): pid=7820 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.650076] audit: type=1800 audit(1547662228.706:27): pid=7820 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 syzkaller login: [ 45.156202] sshd (7959) used greatest stack depth: 19576 bytes left Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 51.920666] WARNING: CPU: 0 PID: 7986 at drivers/media/common/videobuf2/videobuf2-core.c:1852 __vb2_queue_cancel+0x8f1/0xd30 [ 51.932172] Kernel panic - not syncing: panic_on_warn set ... [ 51.938046] CPU: 0 PID: 7986 Comm: syz-executor782 Not tainted 5.0.0-rc2+ #29 [ 51.945304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.954651] Call Trace: [ 51.957244] dump_stack+0x1db/0x2d0 [ 51.960862] ? dump_stack_print_info.cold+0x20/0x20 [ 51.965871] ? __vb2_queue_cancel+0x880/0xd30 [ 51.970359] panic+0x2cb/0x65c [ 51.973540] ? add_taint.cold+0x16/0x16 [ 51.977535] ? __vb2_queue_cancel+0x8f1/0xd30 [ 51.982053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.987583] ? __probe_kernel_read+0x1f4/0x250 [ 51.992173] ? __warn.cold+0x5/0x48 [ 51.995800] ? __warn+0xe8/0x1d0 [ 51.999189] ? __vb2_queue_cancel+0x8f1/0xd30 [ 52.003694] __warn.cold+0x20/0x48 [ 52.007242] ? __vb2_queue_cancel+0x8f1/0xd30 [ 52.011746] report_bug+0x263/0x2b0 [ 52.015372] do_error_trap+0x11b/0x200 [ 52.019248] do_invalid_op+0x37/0x50 [ 52.022963] ? __vb2_queue_cancel+0x8f1/0xd30 [ 52.027476] invalid_op+0x14/0x20 [ 52.030940] RIP: 0010:__vb2_queue_cancel+0x8f1/0xd30 [ 52.036038] 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 [ 52.054942] RSP: 0018:ffff8880a00cf938 EFLAGS: 00010293 [ 52.060296] RAX: ffff88809062c180 RBX: ffff8880a00cfa50 RCX: ffffffff85425c42 [ 52.067560] RDX: 0000000000000000 RSI: ffffffff85426371 RDI: 0000000000000005 [ 52.074812] RBP: ffff8880a00cfa78 R08: ffff88809062c180 R09: ffffed104317ace1 [ 52.082067] R10: ffffed104317ace0 R11: ffff888218bd6707 R12: ffff888218bd6704 [ 52.089320] R13: dffffc0000000000 R14: 0000000000000002 R15: ffff888218bd64c0 [ 52.096603] ? __vb2_queue_cancel+0x1c2/0xd30 [ 52.101105] ? __vb2_queue_cancel+0x8f1/0xd30 [ 52.105614] ? __vb2_queue_cancel+0x8f1/0xd30 [ 52.110122] ? kasan_check_read+0x11/0x20 [ 52.114270] ? do_raw_spin_unlock+0xa0/0x330 [ 52.118684] ? vb2_buffer_done+0xc90/0xc90 [ 52.122906] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 52.128002] ? kasan_check_write+0x14/0x20 [ 52.132225] ? wake_up_q+0xaa/0x100 [ 52.135841] ? __mutex_unlock_slowpath+0x420/0x870 [ 52.140776] vb2_core_streamoff+0x60/0x140 [ 52.145012] __vb2_cleanup_fileio+0x78/0x170 [ 52.149421] vb2_core_queue_release+0x20/0x80 [ 52.153922] _vb2_fop_release+0x1cf/0x2a0 [ 52.158070] vb2_fop_release+0x75/0xc0 [ 52.161948] vivid_fop_release+0x18e/0x430 [ 52.166170] ? vivid_remove+0x460/0x460 [ 52.170132] v4l2_release+0x224/0x3a0 [ 52.173923] __fput+0x3c5/0xb10 [ 52.177217] ? dev_debug_store+0x150/0x150 [ 52.181442] ? get_max_files+0x20/0x20 [ 52.185324] ? task_work_run+0x1bb/0x2b0 [ 52.189381] ? trace_hardirqs_off_caller+0x300/0x300 [ 52.194489] ? do_raw_spin_trylock+0x270/0x270 [ 52.199081] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.204634] ____fput+0x16/0x20 [ 52.207913] task_work_run+0x1f4/0x2b0 [ 52.211787] ? task_work_cancel+0x2c0/0x2c0 [ 52.216102] ? __close_fd+0x25f/0x3d0 [ 52.219893] ? do_syscall_64+0x8c/0x800 [ 52.223860] exit_to_usermode_loop+0x32a/0x3b0 [ 52.228456] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.233840] ? syscall_trace_enter+0x12a0/0x12a0 [ 52.238581] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.243327] do_syscall_64+0x696/0x800 [ 52.247201] ? syscall_return_slowpath+0x5f0/0x5f0 [ 52.252128] ? prepare_exit_to_usermode+0x232/0x3b0 [ 52.257131] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.261964] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.267139] RIP: 0033:0x400ef0 [ 52.270326] 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 [ 52.289230] RSP: 002b:00007fff0f43b7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 52.296928] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0 [ 52.304183] RDX: 00000000000ca800 RSI: 0000000020000000 RDI: 0000000000000003 [ 52.311436] RBP: 0000000000000000 R08: 0000000001023880 R09: 00000000004002e0 [ 52.318708] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401e00 [ 52.325962] R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000 [ 52.334284] Kernel Offset: disabled [ 52.337963] Rebooting in 86400 seconds..