[....] Starting periodic command scheduler: cron[ 51.401460] audit: type=1800 audit(1556182813.835:30): pid=8046 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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: [ 56.901621] kauditd_printk_skb: 4 callbacks suppressed [ 56.901636] audit: type=1400 audit(1556182819.335:35): avc: denied { map } for pid=8221 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.23' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 515.097460] audit: type=1400 audit(1556183277.535:36): avc: denied { map } for pid=8233 comm="syz-executor945" path="/root/syz-executor945151800" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 515.369043] WARNING: CPU: 1 PID: 8351 at drivers/media/common/videobuf2/videobuf2-core.c:1670 __vb2_queue_cancel+0x635/0x970 [ 515.381771] Kernel panic - not syncing: panic_on_warn set ... [ 515.381771] [ 515.389193] CPU: 1 PID: 8351 Comm: syz-executor945 Not tainted 4.19.36 #4 [ 515.396234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 515.406100] Call Trace: [ 515.410018] dump_stack+0x172/0x1f0 [ 515.414001] panic+0x263/0x51d [ 515.417424] ? __warn_printk+0xf3/0xf3 [ 515.421605] ? __vb2_queue_cancel+0x635/0x970 [ 515.426300] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 515.436908] ? __warn.cold+0x5/0x54 [ 515.441156] ? __warn+0xe8/0x1d0 [ 515.445156] ? __vb2_queue_cancel+0x635/0x970 [ 515.450685] __warn.cold+0x20/0x54 [ 515.455002] ? __vb2_queue_cancel+0x635/0x970 [ 515.460092] report_bug+0x263/0x2b0 [ 515.464039] do_error_trap+0x204/0x360 [ 515.468040] ? math_error+0x340/0x340 [ 515.471968] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 515.477857] ? error_entry+0x76/0xd0 [ 515.481849] ? trace_hardirqs_off_caller+0x65/0x220 [ 515.487872] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 515.493011] do_invalid_op+0x1b/0x20 [ 515.497084] invalid_op+0x14/0x20 [ 515.500589] RIP: 0010:__vb2_queue_cancel+0x635/0x970 [ 515.505942] Code: 03 0f 8e ce 02 00 00 41 8b 5c 24 20 e9 c1 fc ff ff e8 2f ed c7 fc 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 1b ed c7 fc <0f> 0b 49 8d 85 28 02 00 00 48 89 c2 48 89 45 a0 48 b8 00 00 00 00 [ 515.525311] RSP: 0018:ffff888083fdfae8 EFLAGS: 00010293 [ 515.530810] RAX: ffff888089924500 RBX: 0000000000000001 RCX: ffffffff84a352c7 [ 515.538108] RDX: 0000000000000000 RSI: ffffffff84a357f5 RDI: 0000000000000005 [ 515.545430] RBP: ffff888083fdfb58 R08: ffff888089924500 R09: ffffed1013d1abc8 [ 515.552901] R10: ffffed1013d1abc7 R11: ffff88809e8d5e3f R12: ffff88809e8d5e3c [ 515.560932] R13: ffff88809e8d5bf8 R14: ffff88809e8d5ed8 R15: ffff88809e8d5ed0 [ 515.569364] ? __vb2_queue_cancel+0x107/0x970 [ 515.573868] ? __vb2_queue_cancel+0x635/0x970 [ 515.578364] ? __vb2_queue_cancel+0x635/0x970 [ 515.582881] ? lock_downgrade+0x810/0x810 [ 515.587136] ? v4l2_fh_is_singular+0xff/0x160 [ 515.591662] vb2_core_streamoff+0x60/0x140 [ 515.596015] __vb2_cleanup_fileio+0x78/0x170 [ 515.600701] vb2_core_queue_release+0x20/0x80 [ 515.605203] _vb2_fop_release+0x1cf/0x2a0 [ 515.609363] vb2_fop_release+0x75/0xc0 [ 515.613838] vivid_fop_release+0x18e/0x430 [ 515.618096] ? vivid_remove+0x460/0x460 [ 515.622075] ? dev_debug_store+0x110/0x110 [ 515.626462] v4l2_release+0xfb/0x1a0 [ 515.630388] __fput+0x2df/0x8b0 [ 515.633952] ____fput+0x16/0x20 [ 515.637250] task_work_run+0x14a/0x1c0 [ 515.641155] do_exit+0x933/0x2fa0 [ 515.644884] ? mm_update_next_owner+0x660/0x660 [ 515.649563] ? up_read+0x1a/0x110 [ 515.653112] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 515.658903] ? __do_page_fault+0x484/0xe90 [ 515.663847] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 515.669038] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 515.673944] do_group_exit+0x135/0x370 [ 515.677839] __x64_sys_exit_group+0x44/0x50 [ 515.682320] do_syscall_64+0x103/0x610 [ 515.686408] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 515.691792] RIP: 0033:0x443b78 [ 515.695356] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 515.715720] RSP: 002b:00007fff363c7998 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 515.723635] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b78 [ 515.731047] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 515.738520] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 515.745985] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 515.753543] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 515.762537] Kernel Offset: disabled [ 515.766270] Rebooting in 86400 seconds..