[ 57.893814][ T26] audit: type=1800 audit(1574455495.065:25): pid=8819 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.936292][ T26] audit: type=1800 audit(1574455495.075:26): pid=8819 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.974599][ T26] audit: type=1800 audit(1574455495.075:27): pid=8819 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. [ 58.468443][ T8882] sshd (8882) used greatest stack depth: 22888 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.183' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 68.158336][ T8980] ------------[ cut here ]------------ [ 68.164519][ T8980] WARNING: CPU: 0 PID: 8980 at drivers/media/common/videobuf2/videobuf2-core.c:1882 __vb2_queue_cancel+0x8b6/0xc80 [ 68.177079][ T8980] Kernel panic - not syncing: panic_on_warn set ... [ 68.183682][ T8980] CPU: 0 PID: 8980 Comm: syz-executor731 Not tainted 5.4.0-rc8-syzkaller #0 [ 68.192360][ T8980] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.202507][ T8980] Call Trace: [ 68.205825][ T8980] dump_stack+0x197/0x210 [ 68.210184][ T8980] ? __vb2_queue_cancel+0x850/0xc80 [ 68.215740][ T8980] panic+0x2e3/0x75c [ 68.219815][ T8980] ? add_taint.cold+0x16/0x16 [ 68.224500][ T8980] ? printk+0xba/0xed [ 68.228534][ T8980] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 68.233991][ T8980] ? __warn.cold+0x14/0x35 [ 68.238593][ T8980] ? __warn+0xd9/0x1d0 [ 68.242658][ T8980] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.248185][ T8980] __warn.cold+0x2f/0x35 [ 68.252468][ T8980] ? report_bug.cold+0x63/0xad [ 68.257241][ T8980] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.262446][ T8980] report_bug+0x289/0x300 [ 68.266782][ T8980] do_error_trap+0x11b/0x200 [ 68.271372][ T8980] do_invalid_op+0x37/0x50 [ 68.275793][ T8980] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.280986][ T8980] invalid_op+0x23/0x30 [ 68.285138][ T8980] RIP: 0010:__vb2_queue_cancel+0x8b6/0xc80 [ 68.290937][ T8980] Code: 1e fb ff ff 48 89 df e8 d8 e9 d7 fc e9 11 fb ff ff e8 5e 7e 9c fc 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 4a 7e 9c fc <0f> 0b 48 8b 45 d0 48 05 28 02 00 00 48 89 c2 48 89 45 88 48 b8 00 [ 68.310533][ T8980] RSP: 0018:ffff8880a0077ac0 EFLAGS: 00010293 [ 68.316594][ T8980] RAX: ffff88809865a700 RBX: 0000000000000001 RCX: ffffffff84d6d0ce [ 68.324561][ T8980] RDX: 0000000000000000 RSI: ffffffff84d6d866 RDI: 0000000000000005 [ 68.332525][ T8980] RBP: ffff8880a0077b38 R08: ffff88809865a700 R09: ffffed104306ce88 [ 68.340503][ T8980] R10: ffffed104306ce87 R11: ffff88821836743f R12: ffff88821836743c [ 68.348482][ T8980] R13: ffff8882183674d0 R14: ffff8882183671f8 R15: ffff8882183613f0 [ 68.356574][ T8980] ? __vb2_queue_cancel+0x11e/0xc80 [ 68.361775][ T8980] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.366993][ T8980] ? refcount_dec_and_test_checked+0x1b/0x20 [ 68.372982][ T8980] vb2_core_streamoff+0x60/0x150 [ 68.377910][ T8980] __vb2_cleanup_fileio+0x78/0x170 [ 68.383039][ T8980] vb2_core_queue_release+0x20/0x80 [ 68.388254][ T8980] _vb2_fop_release+0x1cf/0x2a0 [ 68.393121][ T8980] vb2_fop_release+0x75/0xc0 [ 68.397715][ T8980] vivid_fop_release+0x18e/0x450 [ 68.402648][ T8980] ? vivid_req_validate+0xc0/0xc0 [ 68.407660][ T8980] v4l2_release+0x21f/0x390 [ 68.412154][ T8980] __fput+0x2ff/0x890 [ 68.416143][ T8980] ? dev_debug_store+0x110/0x110 [ 68.421078][ T8980] ____fput+0x16/0x20 [ 68.425049][ T8980] task_work_run+0x145/0x1c0 [ 68.429639][ T8980] do_exit+0x904/0x2e60 [ 68.433788][ T8980] ? mm_update_next_owner+0x640/0x640 [ 68.439148][ T8980] ? down_read_non_owner+0x490/0x490 [ 68.444448][ T8980] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 68.450684][ T8980] ? handle_mm_fault+0x4b0/0xaa0 [ 68.455630][ T8980] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 68.461096][ T8980] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 68.466572][ T8980] do_group_exit+0x135/0x360 [ 68.471178][ T8980] __x64_sys_exit_group+0x44/0x50 [ 68.476198][ T8980] do_syscall_64+0xfa/0x760 [ 68.480698][ T8980] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.486581][ T8980] RIP: 0033:0x443b78 [ 68.490485][ T8980] 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 [ 68.511215][ T8980] RSP: 002b:00007ffd73590c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 68.519617][ T8980] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b78 [ 68.527604][ T8980] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 68.535593][ T8980] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 68.543691][ T8980] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000001 [ 68.551648][ T8980] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 68.561499][ T8980] Kernel Offset: disabled [ 68.565911][ T8980] Rebooting in 86400 seconds..