[ 47.455752] audit: type=1800 audit(1546592914.796:30): pid=8293 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=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.126' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 56.224594] kauditd_printk_skb: 5 callbacks suppressed [ 56.224612] audit: type=1400 audit(1546592923.586:36): avc: denied { map } for pid=8503 comm="syz-executor685" path="/root/syz-executor685070310" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 56.286337] WARNING: CPU: 0 PID: 8511 at drivers/media/common/videobuf2/videobuf2-core.c:1852 __vb2_queue_cancel+0x8f1/0xd30 [ 56.297820] Kernel panic - not syncing: panic_on_warn set ... [ 56.303702] CPU: 0 PID: 8511 Comm: syz-executor685 Not tainted 4.20.0+ #8 [ 56.310607] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.319948] Call Trace: [ 56.324271] dump_stack+0x1db/0x2d0 [ 56.327885] ? dump_stack_print_info.cold+0x20/0x20 [ 56.332906] ? __vb2_queue_cancel+0x8c0/0xd30 [ 56.337404] panic+0x2cb/0x589 [ 56.340597] ? add_taint.cold+0x16/0x16 [ 56.344586] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.349083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.354609] ? __probe_kernel_read+0x1f4/0x250 [ 56.359176] ? __warn.cold+0x5/0x4b [ 56.362789] ? __warn+0xe8/0x1d0 [ 56.366144] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.370624] __warn.cold+0x20/0x4b [ 56.374150] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.378631] report_bug+0x263/0x2b0 [ 56.382256] do_error_trap+0x11b/0x200 [ 56.386134] do_invalid_op+0x37/0x50 [ 56.389835] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.394321] invalid_op+0x14/0x20 [ 56.397759] RIP: 0010:__vb2_queue_cancel+0x8f1/0xd30 [ 56.402848] 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 1f b5 3f fc <0f> 0b 49 8d 87 28 02 00 00 48 89 85 d0 fe ff ff 48 c1 e8 03 42 0f [ 56.421775] RSP: 0018:ffff88808221f938 EFLAGS: 00010293 [ 56.427122] RAX: ffff88808dc60200 RBX: ffff88808221fa50 RCX: ffffffff85423902 [ 56.434380] RDX: 0000000000000000 RSI: ffffffff85424031 RDI: 0000000000000005 [ 56.441638] RBP: ffff88808221fa78 R08: ffff88808dc60200 R09: ffffed10430cae8b [ 56.448911] R10: ffffed10430cae8a R11: ffff888218657457 R12: ffff888218657454 [ 56.456193] R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888218657210 [ 56.463467] ? __vb2_queue_cancel+0x1c2/0xd30 [ 56.467949] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.472434] ? __vb2_queue_cancel+0x8f1/0xd30 [ 56.476936] ? kasan_check_read+0x11/0x20 [ 56.481103] ? do_raw_spin_unlock+0xa0/0x330 [ 56.485506] ? vb2_buffer_done+0xc90/0xc90 [ 56.489728] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 56.494817] ? kasan_check_write+0x14/0x20 [ 56.499052] ? wake_up_q+0xaa/0x100 [ 56.502665] ? __mutex_unlock_slowpath+0x420/0x870 [ 56.507595] vb2_core_streamoff+0x60/0x140 [ 56.511816] __vb2_cleanup_fileio+0x78/0x170 [ 56.516230] vb2_core_queue_release+0x20/0x80 [ 56.520723] _vb2_fop_release+0x1cf/0x2a0 [ 56.524860] vb2_fop_release+0x75/0xc0 [ 56.528749] vivid_fop_release+0x18e/0x430 [ 56.532985] ? vivid_remove+0x460/0x460 [ 56.536976] v4l2_release+0x224/0x3a0 [ 56.540789] __fput+0x3c5/0xb10 [ 56.544069] ? dev_debug_store+0x150/0x150 [ 56.548292] ? get_max_files+0x20/0x20 [ 56.552203] ? task_work_run+0x1bb/0x2b0 [ 56.556301] ? trace_hardirqs_off_caller+0x300/0x300 [ 56.561399] ? do_raw_spin_trylock+0x270/0x270 [ 56.565972] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.571515] ____fput+0x16/0x20 [ 56.574795] task_work_run+0x1f4/0x2b0 [ 56.578683] ? task_work_cancel+0x2c0/0x2c0 [ 56.582993] ? __close_fd+0x25f/0x3d0 [ 56.586787] ? do_syscall_64+0x8c/0x800 [ 56.590754] exit_to_usermode_loop+0x32a/0x3b0 [ 56.595326] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.600683] ? syscall_trace_enter+0x12a0/0x12a0 [ 56.605435] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.610201] do_syscall_64+0x696/0x800 [ 56.614098] ? syscall_return_slowpath+0x5f0/0x5f0 [ 56.619020] ? prepare_exit_to_usermode+0x232/0x3b0 [ 56.624048] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.628886] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.634063] RIP: 0033:0x400ef0 [ 56.637249] 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 [ 56.656134] RSP: 002b:00007ffca8bd3778 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 56.663823] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0 [ 56.671082] RDX: 00000000fffffdf5 RSI: 0000000020000240 RDI: 0000000000000003 [ 56.678342] RBP: 0000000000000000 R08: 00000000024a9880 R09: 00000000004002e0 [ 56.685594] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401e00 [ 56.692843] R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000 [ 56.701202] Kernel Offset: disabled [ 56.704885] Rebooting in 86400 seconds..