[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.219958][ T26] audit: type=1800 audit(1574455810.603:25): pid=8680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.255874][ T26] audit: type=1800 audit(1574455810.603:26): pid=8680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.304531][ T26] audit: type=1800 audit(1574455810.613:27): pid=8680 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 '10.128.10.42' (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 syzkaller login: [ 68.215817][ T8858] ------------[ cut here ]------------ [ 68.221488][ T8858] WARNING: CPU: 0 PID: 8858 at drivers/media/common/videobuf2/videobuf2-core.c:1882 __vb2_queue_cancel+0x8b6/0xc80 [ 68.233736][ T8858] Kernel panic - not syncing: panic_on_warn set ... [ 68.240317][ T8858] CPU: 0 PID: 8858 Comm: syz-executor717 Not tainted 5.4.0-rc8-syzkaller #0 [ 68.248984][ T8858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.259065][ T8858] Call Trace: [ 68.262651][ T8858] dump_stack+0x197/0x210 [ 68.266998][ T8858] ? __vb2_queue_cancel+0x850/0xc80 [ 68.272240][ T8858] panic+0x2e3/0x75c [ 68.276135][ T8858] ? add_taint.cold+0x16/0x16 [ 68.280811][ T8858] ? printk+0xba/0xed [ 68.284943][ T8858] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 68.290393][ T8858] ? __warn.cold+0x14/0x35 [ 68.294820][ T8858] ? __warn+0xd9/0x1d0 [ 68.298890][ T8858] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.304111][ T8858] __warn.cold+0x2f/0x35 [ 68.308432][ T8858] ? report_bug.cold+0x63/0xad [ 68.313185][ T8858] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.318380][ T8858] report_bug+0x289/0x300 [ 68.322827][ T8858] do_error_trap+0x11b/0x200 [ 68.327421][ T8858] do_invalid_op+0x37/0x50 [ 68.335758][ T8858] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.341097][ T8858] invalid_op+0x23/0x30 [ 68.345255][ T8858] RIP: 0010:__vb2_queue_cancel+0x8b6/0xc80 [ 68.351407][ T8858] 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 [ 68.371328][ T8858] RSP: 0018:ffff8880a8f2fab0 EFLAGS: 00010293 [ 68.377394][ T8858] RAX: ffff8880a9776200 RBX: 0000000000000001 RCX: ffffffff84d6d0ce [ 68.385443][ T8858] RDX: 0000000000000000 RSI: ffffffff84d6d866 RDI: 0000000000000005 [ 68.393421][ T8858] RBP: ffff8880a8f2fb28 R08: ffff8880a9776200 R09: ffffed1013e0ce88 [ 68.402605][ T8858] R10: ffffed1013e0ce87 R11: ffff88809f06743f R12: ffff88809f06743c [ 68.410580][ T8858] R13: ffff88809f0674d0 R14: ffff88809f0671f8 R15: ffff88809f0613f0 [ 68.418565][ T8858] ? __vb2_queue_cancel+0x11e/0xc80 [ 68.423756][ T8858] ? __vb2_queue_cancel+0x8b6/0xc80 [ 68.428964][ T8858] ? refcount_dec_and_test_checked+0x1b/0x20 [ 68.434942][ T8858] vb2_core_streamoff+0x60/0x150 [ 68.439869][ T8858] __vb2_cleanup_fileio+0x78/0x170 [ 68.444989][ T8858] vb2_core_queue_release+0x20/0x80 [ 68.450175][ T8858] _vb2_fop_release+0x1cf/0x2a0 [ 68.455027][ T8858] vb2_fop_release+0x75/0xc0 [ 68.459606][ T8858] vivid_fop_release+0x18e/0x450 [ 68.464553][ T8858] ? vivid_req_validate+0xc0/0xc0 [ 68.469560][ T8858] v4l2_release+0x21f/0x390 [ 68.474066][ T8858] __fput+0x2ff/0x890 [ 68.478036][ T8858] ? dev_debug_store+0x110/0x110 [ 68.482960][ T8858] ____fput+0x16/0x20 [ 68.486926][ T8858] task_work_run+0x145/0x1c0 [ 68.491507][ T8858] do_exit+0x904/0x2e60 [ 68.495652][ T8858] ? mm_update_next_owner+0x640/0x640 [ 68.501019][ T8858] ? down_read_non_owner+0x490/0x490 [ 68.506307][ T8858] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 68.512559][ T8858] ? handle_mm_fault+0x4b0/0xaa0 [ 68.517485][ T8858] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 68.522952][ T8858] do_group_exit+0x135/0x360 [ 68.527550][ T8858] __ia32_sys_exit_group+0x44/0x50 [ 68.534283][ T8858] do_fast_syscall_32+0x27b/0xdb3 [ 68.539306][ T8858] entry_SYSENTER_compat+0x70/0x7f [ 68.544426][ T8858] RIP: 0023:0xf7f5aa39 [ 68.548493][ T8858] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 68.568213][ T8858] RSP: 002b:00000000ffec696c EFLAGS: 00000296 ORIG_RAX: 00000000000000fc [ 68.576705][ T8858] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000080f1298 [ 68.584711][ T8858] RDX: 0000000000000000 RSI: 00000000080dac1c RDI: 00000000080f12a0 [ 68.592780][ T8858] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 68.600764][ T8858] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 68.608724][ T8858] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 68.618832][ T8858] Kernel Offset: disabled [ 68.623293][ T8858] Rebooting in 86400 seconds..