[ 42.861740][ T26] audit: type=1800 audit(1555761865.327:25): pid=7621 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 42.897750][ T26] audit: type=1800 audit(1555761865.327:26): pid=7621 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.926806][ T26] audit: type=1800 audit(1555761865.327:27): pid=7621 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 42.960237][ T26] audit: type=1800 audit(1555761865.337:28): pid=7621 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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 '10.128.10.29' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 60.427507][ T7780] WARNING: CPU: 0 PID: 7780 at drivers/media/common/videobuf2/videobuf2-core.c:1864 __vb2_queue_cancel+0x8bb/0xc80 [ 60.443837][ T7780] Kernel panic - not syncing: panic_on_warn set ... [ 60.452057][ T7780] CPU: 0 PID: 7780 Comm: syz-executor227 Not tainted 5.1.0-rc5+ #77 [ 60.460397][ T7780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.473031][ T7780] Call Trace: [ 60.476813][ T7780] dump_stack+0x172/0x1f0 [ 60.481135][ T7780] ? __vb2_queue_cancel+0x830/0xc80 [ 60.486346][ T7780] panic+0x2cb/0x65c [ 60.490303][ T7780] ? __warn_printk+0xf3/0xf3 [ 60.495080][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.500442][ T7780] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.507654][ T7780] ? __warn.cold+0x5/0x45 [ 60.513116][ T7780] ? __warn+0xe8/0x1d0 [ 60.519252][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.524631][ T7780] __warn.cold+0x20/0x45 [ 60.529642][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.536014][ T7780] report_bug+0x263/0x2b0 [ 60.540778][ T7780] do_error_trap+0x11b/0x200 [ 60.545360][ T7780] do_invalid_op+0x37/0x50 [ 60.549886][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.555241][ T7780] invalid_op+0x14/0x20 [ 60.559737][ T7780] RIP: 0010:__vb2_queue_cancel+0x8bb/0xc80 [ 60.568143][ T7780] Code: 16 fb ff ff 48 89 df e8 63 06 f4 fc e9 09 fb ff ff e8 39 f1 bb fc 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 25 f1 bb fc <0f> 0b 48 8b 45 d0 48 05 28 02 00 00 48 89 c2 48 89 45 88 48 b8 00 [ 60.588698][ T7780] RSP: 0018:ffff8880a85ffac8 EFLAGS: 00010293 [ 60.595471][ T7780] RAX: ffff888085f16240 RBX: 0000000000000001 RCX: ffffffff84b493f1 [ 60.605292][ T7780] RDX: 0000000000000000 RSI: ffffffff84b49b8b RDI: 0000000000000005 [ 60.614288][ T7780] RBP: ffff8880a85ffb40 R08: ffff888085f16240 R09: ffffed104300ccce [ 60.622495][ T7780] R10: ffffed104300cccd R11: ffff88821806666f R12: ffff88821806666c [ 60.631314][ T7780] R13: ffff888218066700 R14: ffff888218066428 R15: ffff888218061428 [ 60.639611][ T7780] ? __vb2_queue_cancel+0x121/0xc80 [ 60.644942][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.650218][ T7780] ? __vb2_queue_cancel+0x8bb/0xc80 [ 60.655639][ T7780] ? refcount_dec_and_test_checked+0x1b/0x20 [ 60.663032][ T7780] vb2_core_streamoff+0x60/0x140 [ 60.668873][ T7780] __vb2_cleanup_fileio+0x78/0x170 [ 60.674168][ T7780] vb2_core_queue_release+0x20/0x80 [ 60.680709][ T7780] _vb2_fop_release+0x1cf/0x2a0 [ 60.686313][ T7780] vb2_fop_release+0x75/0xc0 [ 60.691233][ T7780] vivid_fop_release+0x18e/0x430 [ 60.696334][ T7780] ? vivid_remove+0x470/0x470 [ 60.701180][ T7780] v4l2_release+0x224/0x3a0 [ 60.705816][ T7780] ? dev_debug_store+0x110/0x110 [ 60.711505][ T7780] __fput+0x2e5/0x8d0 [ 60.715761][ T7780] ____fput+0x16/0x20 [ 60.720213][ T7780] task_work_run+0x14a/0x1c0 [ 60.725242][ T7780] do_exit+0x90a/0x2fa0 [ 60.729393][ T7780] ? __do_page_fault+0x623/0xda0 [ 60.734602][ T7780] ? mm_update_next_owner+0x640/0x640 [ 60.739986][ T7780] ? kasan_check_write+0x14/0x20 [ 60.746184][ T7780] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.754092][ T7780] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.760278][ T7780] do_group_exit+0x135/0x370 [ 60.766869][ T7780] __x64_sys_exit_group+0x44/0x50 [ 60.775540][ T7780] do_syscall_64+0x103/0x610 [ 60.781738][ T7780] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.791159][ T7780] RIP: 0033:0x443b78 [ 60.801990][ T7780] 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 [ 60.828219][ T7780] RSP: 002b:00007ffc4458d458 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 60.847598][ T7780] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b78 [ 60.860032][ T7780] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 60.873042][ T7780] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 60.881735][ T7780] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 60.890315][ T7780] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 60.899247][ T7780] Kernel Offset: disabled [ 60.904073][ T7780] Rebooting in 86400 seconds..