[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 42.953274][ T24] audit: type=1800 audit(1557275201.853:25): pid=7836 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 42.985267][ T24] audit: type=1800 audit(1557275201.863:26): pid=7836 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.023618][ T24] audit: type=1800 audit(1557275201.863:27): pid=7836 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 '10.128.0.132' (ECDSA) to the list of known hosts. syzkaller login: [ 53.302949][ T7998] IPVS: ftp: loaded support on port[0] = 21 [ 53.302976][ T7997] IPVS: ftp: loaded support on port[0] = 21 [ 53.318526][ T7993] IPVS: ftp: loaded support on port[0] = 21 [ 53.323708][ T7999] IPVS: ftp: loaded support on port[0] = 21 [ 53.328577][ T7996] IPVS: ftp: loaded support on port[0] = 21 [ 53.339737][ T7995] IPVS: ftp: loaded support on port[0] = 21 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 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 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 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program [ 54.255407][ T8653] WARNING: CPU: 0 PID: 8653 at kernel/cgroup/cgroup.c:6008 cgroup_exit+0x51a/0x5d0 [ 54.264911][ T8653] Kernel panic - not syncing: panic_on_warn set ... [ 54.271531][ T8653] CPU: 0 PID: 8653 Comm: syz-executor076 Not tainted 5.1.0-next-20190507 #2 [ 54.280234][ T8653] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.290332][ T8653] Call Trace: [ 54.293641][ T8653] dump_stack+0x172/0x1f0 [ 54.297980][ T8653] ? cgroup_exit+0x430/0x5d0 [ 54.302582][ T8653] panic+0x2cb/0x75a [ 54.306485][ T8653] ? __warn_printk+0xf3/0xf3 [ 54.311097][ T8653] ? cgroup_exit+0x51a/0x5d0 [ 54.315754][ T8653] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.322009][ T8653] ? __warn.cold+0x5/0x47 [ 54.326357][ T8653] ? __warn+0xe8/0x1d0 [ 54.330460][ T8653] ? cgroup_exit+0x51a/0x5d0 [ 54.335078][ T8653] __warn.cold+0x20/0x47 [ 54.339346][ T8653] ? mark_held_locks+0xf0/0xf0 [ 54.344140][ T8653] ? cgroup_exit+0x51a/0x5d0 [ 54.348748][ T8653] report_bug+0x263/0x2b0 [ 54.353089][ T8653] do_error_trap+0x11b/0x200 [ 54.357684][ T8653] do_invalid_op+0x37/0x50 [ 54.362107][ T8653] ? cgroup_exit+0x51a/0x5d0 [ 54.366705][ T8653] invalid_op+0x14/0x20 [ 54.370880][ T8653] RIP: 0010:cgroup_exit+0x51a/0x5d0 [ 54.376081][ T8653] Code: 00 48 c7 c2 20 7f 6d 87 be d3 01 00 00 48 c7 c7 20 80 6d 87 c6 05 01 93 f1 07 01 e8 fb 03 ed ff e9 b1 fb ff ff e8 96 f9 05 00 <0f> 0b e9 75 fc ff ff e8 8a f9 05 00 48 c7 c2 e0 82 6d 87 be 85 02 [ 54.395699][ T8653] RSP: 0018:ffff888086c17a80 EFLAGS: 00010093 [ 54.402527][ T8653] RAX: ffff88808e99a000 RBX: 0000000000000001 RCX: ffffffff816b0b5e [ 54.410518][ T8653] RDX: 0000000000000000 RSI: ffffffff816b0eea RDI: 0000000000000001 [ 54.418513][ T8653] RBP: ffff888086c17b18 R08: ffff88808e99a000 R09: ffffed1010d82f3e [ 54.426505][ T8653] R10: ffffed1010d82f3d R11: 0000000000000003 R12: ffff88808e99a000 [ 54.434570][ T8653] R13: ffff8880981c3200 R14: ffff888086c17af0 R15: 1ffff11010d82f52 [ 54.442581][ T8653] ? cgroup_exit+0x18e/0x5d0 [ 54.447174][ T8653] ? cgroup_exit+0x51a/0x5d0 [ 54.451776][ T8653] ? cgroup_post_fork+0x540/0x540 [ 54.456821][ T8653] do_exit+0x97a/0x2fa0 [ 54.460990][ T8653] ? __switch_to_asm+0x40/0x70 [ 54.465760][ T8653] ? get_signal+0xa7d/0x2270 [ 54.470356][ T8653] ? mm_update_next_owner+0x640/0x640 [ 54.475757][ T8653] ? lock_acquire+0x16f/0x3f0 [ 54.480450][ T8653] ? _raw_spin_unlock_irq+0x28/0x90 [ 54.485663][ T8653] ? get_signal+0xa7d/0x2270 [ 54.490258][ T8653] ? _raw_spin_unlock_irq+0x28/0x90 [ 54.495482][ T8653] do_group_exit+0x135/0x370 [ 54.500113][ T8653] get_signal+0x425/0x2270 [ 54.504574][ T8653] do_signal+0x87/0x1900 [ 54.508831][ T8653] ? mark_held_locks+0xf0/0xf0 [ 54.513624][ T8653] ? finish_task_switch+0x146/0x740 [ 54.518855][ T8653] ? __task_pid_nr_ns+0x1b1/0x530 [ 54.523902][ T8653] ? setup_sigcontext+0x7d0/0x7d0 [ 54.528972][ T8653] ? do_syscall_64+0x57e/0x670 [ 54.533740][ T8653] ? exit_to_usermode_loop+0x43/0x2c0 [ 54.539120][ T8653] ? lockdep_hardirqs_on+0x418/0x5d0 [ 54.544414][ T8653] ? trace_hardirqs_on+0x67/0x230 [ 54.549740][ T8653] exit_to_usermode_loop+0x244/0x2c0 [ 54.555036][ T8653] do_syscall_64+0x57e/0x670 [ 54.559638][ T8653] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.565535][ T8653] RIP: 0033:0x4471e9 [ 54.569441][ T8653] Code: e8 3c e6 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 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.589062][ T8653] RSP: 002b:00007f479f748db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 54.597498][ T8653] RAX: fffffffffffffe00 RBX: 00000000006dcc38 RCX: 00000000004471e9 [ 54.605485][ T8653] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc38 [ 54.613466][ T8653] RBP: 00000000006dcc30 R08: 0000000000000000 R09: 0000000000000000 [ 54.621445][ T8653] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c [ 54.629422][ T8653] R13: 00007ffd1ab0c31f R14: 00007f479f7499c0 R15: 0000000000000001 [ 55.807673][ T8653] Shutting down cpus with NMI [ 55.813602][ T8653] Kernel Offset: disabled [ 55.818005][ T8653] Rebooting in 86400 seconds..