[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.915771][ T26] audit: type=1800 audit(1559588306.094:25): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.956166][ T26] audit: type=1800 audit(1559588306.094:26): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.996806][ T26] audit: type=1800 audit(1559588306.094:27): pid=8650 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 Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 67.326858][ T8823] WARNING: CPU: 1 PID: 8823 at drivers/media/common/videobuf2/videobuf2-core.c:1877 __vb2_queue_cancel+0x8b6/0xc80 [ 67.339224][ T8823] Kernel panic - not syncing: panic_on_warn set ... [ 67.345811][ T8823] CPU: 1 PID: 8823 Comm: syz-executor206 Not tainted 5.2.0-rc3 #18 [ 67.353678][ T8823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.363826][ T8823] Call Trace: [ 67.367110][ T8823] dump_stack+0x172/0x1f0 [ 67.371452][ T8823] ? __vb2_queue_cancel+0x800/0xc80 [ 67.376732][ T8823] panic+0x2cb/0x744 [ 67.380630][ T8823] ? __warn_printk+0xf3/0xf3 [ 67.385748][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.402304][ T8823] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.408531][ T8823] ? __warn.cold+0x5/0x4d [ 67.412843][ T8823] ? __warn+0xe8/0x1d0 [ 67.417531][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.422712][ T8823] __warn.cold+0x20/0x4d [ 67.426939][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.432122][ T8823] report_bug+0x263/0x2b0 [ 67.436457][ T8823] do_error_trap+0x11b/0x200 [ 67.441051][ T8823] do_invalid_op+0x37/0x50 [ 67.445450][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.450630][ T8823] invalid_op+0x14/0x20 [ 67.454768][ T8823] RIP: 0010:__vb2_queue_cancel+0x8b6/0xc80 [ 67.460578][ T8823] Code: 1e fb ff ff 48 89 df e8 48 bb ef fc e9 11 fb ff ff e8 0e 1d b7 fc 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 fa 1c b7 fc <0f> 0b 48 8b 45 d0 48 05 28 02 00 00 48 89 c2 48 89 45 88 48 b8 00 [ 67.480169][ T8823] RSP: 0018:ffff88809f117858 EFLAGS: 00010293 [ 67.486216][ T8823] RAX: ffff8880a573a300 RBX: 0000000000000001 RCX: ffffffff84b9821e [ 67.494178][ T8823] RDX: 0000000000000000 RSI: ffffffff84b989b6 RDI: 0000000000000005 [ 67.502180][ T8823] RBP: ffff88809f1178d0 R08: ffff8880a573a300 R09: ffffed1013d7cd2e [ 67.510134][ T8823] R10: ffffed1013d7cd2d R11: ffff88809ebe696f R12: ffff88809ebe696c [ 67.518216][ T8823] R13: ffff88809ebe6a00 R14: ffff88809ebe6728 R15: ffff88809ebe2408 [ 67.526189][ T8823] ? __vb2_queue_cancel+0x11e/0xc80 [ 67.531479][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.536689][ T8823] ? __vb2_queue_cancel+0x8b6/0xc80 [ 67.541898][ T8823] ? refcount_dec_and_test_checked+0x1b/0x20 [ 67.547908][ T8823] vb2_core_streamoff+0x60/0x150 [ 67.552850][ T8823] __vb2_cleanup_fileio+0x78/0x170 [ 67.557963][ T8823] vb2_core_queue_release+0x20/0x80 [ 67.563162][ T8823] _vb2_fop_release+0x1cf/0x2a0 [ 67.568003][ T8823] vb2_fop_release+0x75/0xc0 [ 67.572579][ T8823] vivid_fop_release+0x18e/0x430 [ 67.577508][ T8823] ? vidioc_querycap+0x2d0/0x2d0 [ 67.582445][ T8823] v4l2_release+0x21f/0x390 [ 67.586946][ T8823] __fput+0x2ff/0x890 [ 67.590913][ T8823] ? dev_debug_store+0x110/0x110 [ 67.595837][ T8823] ____fput+0x16/0x20 [ 67.599804][ T8823] task_work_run+0x145/0x1c0 [ 67.604383][ T8823] do_exit+0x90a/0x2fa0 [ 67.608534][ T8823] ? get_signal+0x387/0x24b0 [ 67.613201][ T8823] ? mm_update_next_owner+0x640/0x640 [ 67.618560][ T8823] ? kasan_check_write+0x14/0x20 [ 67.623484][ T8823] ? _raw_spin_unlock_irq+0x28/0x90 [ 67.628663][ T8823] ? get_signal+0x387/0x24b0 [ 67.633234][ T8823] ? _raw_spin_unlock_irq+0x28/0x90 [ 67.638424][ T8823] do_group_exit+0x135/0x370 [ 67.643022][ T8823] get_signal+0x471/0x24b0 [ 67.647426][ T8823] ? exit_robust_list+0x2c0/0x2c0 [ 67.652437][ T8823] ? mutex_unlock+0xd/0x10 [ 67.656851][ T8823] do_signal+0x87/0x1900 [ 67.661077][ T8823] ? __vfs_read+0x92/0x110 [ 67.665474][ T8823] ? v4l2_write+0x230/0x230 [ 67.669961][ T8823] ? setup_sigcontext+0x7d0/0x7d0 [ 67.674975][ T8823] ? exit_to_usermode_loop+0x43/0x2c0 [ 67.680331][ T8823] ? do_syscall_64+0x58e/0x680 [ 67.685078][ T8823] ? exit_to_usermode_loop+0x43/0x2c0 [ 67.690437][ T8823] ? lockdep_hardirqs_on+0x418/0x5d0 [ 67.695721][ T8823] ? trace_hardirqs_on+0x67/0x220 [ 67.700737][ T8823] exit_to_usermode_loop+0x244/0x2c0 [ 67.706032][ T8823] do_syscall_64+0x58e/0x680 [ 67.710628][ T8823] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.716504][ T8823] RIP: 0033:0x44a6b9 [ 67.720391][ T8823] 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 [ 67.740003][ T8823] RSP: 002b:00007fd99b19bcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 67.748412][ T8823] RAX: 0000000000000001 RBX: 00000000006dbc38 RCX: 000000000044a6b9 [ 67.756412][ T8823] RDX: 000000000044a6b9 RSI: 0000000000000081 RDI: 00000000006dbc3c [ 67.764398][ T8823] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 67.772369][ T8823] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 67.780349][ T8823] R13: 00007fff3bf5c5cf R14: 00007fd99b19c9c0 R15: 0000000000000001 [ 67.789658][ T8823] Kernel Offset: disabled [ 67.794058][ T8823] Rebooting in 86400 seconds..