[ 43.518345] audit: type=1800 audit(1559907314.803:29): pid=7673 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 43.549532] audit: type=1800 audit(1559907314.803:30): pid=7673 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 [....] Starting periodic command scheduler: cron[?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 Warning: Permanently added '10.128.0.255' (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 syzkaller login: [ 52.248211] kauditd_printk_skb: 5 callbacks suppressed [ 52.248227] audit: type=1400 audit(1559907323.533:36): avc: denied { map } for pid=7859 comm="syz-executor956" path="/root/syz-executor956906479" 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 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 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 [ 52.797218] WARNING: CPU: 0 PID: 8348 at drivers/media/common/videobuf2/videobuf2-core.c:1686 __vb2_queue_cancel+0x62f/0x960 [ 52.808814] Kernel panic - not syncing: panic_on_warn set ... [ 52.808814] [ 52.816190] CPU: 0 PID: 8348 Comm: syz-executor956 Not tainted 4.19.48 #20 [ 52.823223] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.832598] Call Trace: [ 52.835190] dump_stack+0x172/0x1f0 [ 52.838816] panic+0x263/0x507 [ 52.842016] ? __warn_printk+0xf3/0xf3 [ 52.845928] ? __vb2_queue_cancel+0x62f/0x960 [ 52.850425] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.855961] ? __warn.cold+0x5/0x4a [ 52.859581] ? __warn+0xe8/0x1d0 [ 52.862942] ? __vb2_queue_cancel+0x62f/0x960 [ 52.867432] __warn.cold+0x20/0x4a [ 52.870970] ? __vb2_queue_cancel+0x62f/0x960 [ 52.875458] report_bug+0x263/0x2b0 [ 52.879100] do_error_trap+0x204/0x360 [ 52.882996] ? math_error+0x340/0x340 [ 52.886792] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 52.892597] ? error_entry+0x76/0xd0 [ 52.896322] ? trace_hardirqs_off_caller+0x65/0x220 [ 52.901343] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.906190] do_invalid_op+0x1b/0x20 [ 52.909915] invalid_op+0x14/0x20 [ 52.913362] RIP: 0010:__vb2_queue_cancel+0x62f/0x960 [ 52.918455] Code: 03 0f 8e ce 02 00 00 41 8b 5c 24 20 e9 c6 fc ff ff e8 25 57 c8 fc 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 11 57 c8 fc <0f> 0b 49 8d 85 28 02 00 00 48 89 c2 48 89 45 a0 48 b8 00 00 00 00 [ 52.937361] RSP: 0018:ffff888099097808 EFLAGS: 00010293 [ 52.942731] RAX: ffff8880a88cc440 RBX: 0000000000000001 RCX: ffffffff84a2a7e4 [ 52.949992] RDX: 0000000000000000 RSI: ffffffff84a2ad0f RDI: 0000000000000005 [ 52.957344] RBP: ffff888099097878 R08: ffff8880a88cc440 R09: ffffed10430b0c18 [ 52.964625] R10: ffffed10430b0c17 R11: ffff8882185860bf R12: ffff8882185860bc [ 52.971900] R13: ffff888218585e78 R14: ffff888218586158 R15: ffff888218586150 [ 52.979177] ? __vb2_queue_cancel+0x104/0x960 [ 52.983663] ? __vb2_queue_cancel+0x62f/0x960 [ 52.988151] ? __vb2_queue_cancel+0x62f/0x960 [ 52.992639] ? lock_downgrade+0x810/0x810 [ 52.996783] ? v4l2_fh_is_singular+0xff/0x160 [ 53.001272] vb2_core_streamoff+0x60/0x150 [ 53.005502] __vb2_cleanup_fileio+0x78/0x170 [ 53.009922] vb2_core_queue_release+0x20/0x80 [ 53.014438] _vb2_fop_release+0x1cf/0x2a0 [ 53.018606] vb2_fop_release+0x75/0xc0 [ 53.022500] vivid_fop_release+0x18e/0x430 [ 53.026737] ? vivid_remove+0x460/0x460 [ 53.030725] ? dev_debug_store+0x110/0x110 [ 53.034961] v4l2_release+0xf9/0x1a0 [ 53.038702] __fput+0x2dd/0x8b0 [ 53.041982] ____fput+0x16/0x20 [ 53.045262] task_work_run+0x145/0x1c0 [ 53.049143] do_exit+0x933/0x2fa0 [ 53.052588] ? get_signal+0x331/0x1d50 [ 53.056477] ? mm_update_next_owner+0x660/0x660 [ 53.061141] ? _raw_spin_unlock_irq+0x28/0x90 [ 53.065626] ? get_signal+0x331/0x1d50 [ 53.069520] ? _raw_spin_unlock_irq+0x28/0x90 [ 53.074031] do_group_exit+0x135/0x370 [ 53.077913] get_signal+0x399/0x1d50 [ 53.081645] do_signal+0x95/0x1960 [ 53.085195] ? __inode_security_revalidate+0xda/0x120 [ 53.090378] ? avc_policy_seqno+0xd/0x70 [ 53.094440] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 53.099495] ? setup_sigcontext+0x7d0/0x7d0 [ 53.103826] ? security_file_permission+0x89/0x230 [ 53.108761] ? rw_verify_area+0x118/0x360 [ 53.112908] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.118459] ? __x64_sys_futex+0x40d/0x590 [ 53.122711] ? ksys_read+0x1f1/0x2d0 [ 53.126444] ? exit_to_usermode_loop+0x43/0x2c0 [ 53.131123] ? do_syscall_64+0x53d/0x620 [ 53.135194] ? exit_to_usermode_loop+0x43/0x2c0 [ 53.139879] ? lockdep_hardirqs_on+0x415/0x5d0 [ 53.144456] ? trace_hardirqs_on+0x67/0x220 [ 53.148787] exit_to_usermode_loop+0x244/0x2c0 [ 53.153395] do_syscall_64+0x53d/0x620 [ 53.157279] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.162477] RIP: 0033:0x44a6b9 [ 53.165680] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.184611] RSP: 002b:00007f3e34eb5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 53.192315] RAX: fffffffffffffe00 RBX: 00000000006dbc38 RCX: 000000000044a6b9 [ 53.199584] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc38 [ 53.206891] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 53.214166] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 53.221446] R13: 00007ffea4a818df R14: 00007f3e34eb69c0 R15: 0000000000000001 [ 53.229892] Kernel Offset: disabled [ 53.233570] Rebooting in 86400 seconds..