[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 67.290371][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 67.290388][ T27] audit: type=1800 audit(1565900629.916:29): pid=9353 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 67.317287][ T27] audit: type=1800 audit(1565900629.916:30): pid=9353 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.231' (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 syzkaller login: [ 83.869488][ T9525] ------------[ cut here ]------------ [ 83.876535][ T9525] WARNING: CPU: 1 PID: 9525 at drivers/media/common/videobuf2/videobuf2-core.c:1882 __vb2_queue_cancel.cold+0x11/0x20f [ 83.888948][ T9525] Kernel panic - not syncing: panic_on_warn set ... [ 83.896068][ T9525] CPU: 1 PID: 9525 Comm: syz-executor886 Not tainted 5.3.0-rc4-next-20190814 #66 [ 83.905868][ T9525] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.916235][ T9525] Call Trace: [ 83.919866][ T9525] dump_stack+0x172/0x1f0 [ 83.924306][ T9525] ? vb2_buffer_done.cold+0x8e/0x114 [ 83.929702][ T9525] panic+0x2dc/0x755 [ 83.934078][ T9525] ? add_taint.cold+0x16/0x16 [ 83.938837][ T9525] ? __kasan_check_write+0x14/0x20 [ 83.944060][ T9525] ? __warn.cold+0x5/0x4c [ 83.948704][ T9525] ? __warn+0xe7/0x1e0 [ 83.952915][ T9525] ? __vb2_queue_cancel.cold+0x11/0x20f [ 83.958594][ T9525] __warn.cold+0x20/0x4c [ 83.962845][ T9525] ? wake_up_klogd+0x99/0xd0 [ 83.967520][ T9525] ? __vb2_queue_cancel.cold+0x11/0x20f [ 83.973182][ T9525] report_bug+0x263/0x2b0 [ 83.977534][ T9525] do_error_trap+0x11b/0x200 [ 83.982132][ T9525] do_invalid_op+0x37/0x50 [ 83.986550][ T9525] ? __vb2_queue_cancel.cold+0x11/0x20f [ 83.992136][ T9525] invalid_op+0x23/0x30 [ 83.996292][ T9525] RIP: 0010:__vb2_queue_cancel.cold+0x11/0x20f [ 84.002566][ T9525] Code: 71 ff ff e9 8f 70 ff ff e8 e6 f6 df fc eb bb e8 df f6 df fc e9 4d ff ff ff e8 c5 19 a5 fc 48 c7 c7 40 1a 27 88 e8 cd 8f 8e fc <0f> 0b 48 8b 45 d0 48 05 28 02 00 00 48 89 45 88 48 c1 e8 03 48 89 [ 84.022893][ T9525] RSP: 0018:ffff88808b8f7ac0 EFLAGS: 00010286 [ 84.028956][ T9525] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 84.036921][ T9525] RDX: 0000000000000000 RSI: ffffffff815bb8d6 RDI: ffffed101171ef4a [ 84.044892][ T9525] RBP: ffff88808b8f7b38 R08: 0000000000000024 R09: ffffed1015d260d9 [ 84.052961][ T9525] R10: ffffed1015d260d8 R11: ffff8880ae9306c7 R12: ffff88809ee4765c [ 84.061106][ T9525] R13: ffff88809ee476f0 R14: ffff88809ee47418 R15: ffff88809ee41550 [ 84.069411][ T9525] ? vprintk_func+0x86/0x189 [ 84.074136][ T9525] ? refcount_dec_and_test_checked+0x1b/0x20 [ 84.080122][ T9525] vb2_core_streamoff+0x60/0x150 [ 84.085118][ T9525] __vb2_cleanup_fileio+0x78/0x170 [ 84.090288][ T9525] vb2_core_queue_release+0x20/0x80 [ 84.095700][ T9525] _vb2_fop_release+0x1cf/0x2a0 [ 84.100608][ T9525] vb2_fop_release+0x75/0xc0 [ 84.105425][ T9525] vivid_fop_release+0x18e/0x450 [ 84.110373][ T9525] ? vivid_req_validate+0xc0/0xc0 [ 84.115491][ T9525] v4l2_release+0x21f/0x390 [ 84.119995][ T9525] __fput+0x2ff/0x890 [ 84.124019][ T9525] ? dev_debug_store+0x110/0x110 [ 84.129057][ T9525] ____fput+0x16/0x20 [ 84.133164][ T9525] task_work_run+0x145/0x1c0 [ 84.137964][ T9525] do_exit+0x92f/0x2e50 [ 84.142121][ T9525] ? mm_update_next_owner+0x640/0x640 [ 84.147498][ T9525] ? down_read_non_owner+0x490/0x490 [ 84.153030][ T9525] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 84.159407][ T9525] ? handle_mm_fault+0x1d3/0x6b0 [ 84.164457][ T9525] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 84.170278][ T9525] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 84.175874][ T9525] do_group_exit+0x135/0x360 [ 84.180489][ T9525] __x64_sys_exit_group+0x44/0x50 [ 84.185534][ T9525] do_syscall_64+0xfa/0x760 [ 84.190177][ T9525] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.196106][ T9525] RIP: 0033:0x443b88 [ 84.200079][ T9525] 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 [ 84.219815][ T9525] RSP: 002b:00007fffdd1286a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.228682][ T9525] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b88 [ 84.236677][ T9525] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 84.244679][ T9525] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 84.252667][ T9525] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000001 [ 84.260792][ T9525] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 84.270564][ T9525] Kernel Offset: disabled [ 84.274988][ T9525] Rebooting in 86400 seconds..