[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.357098] audit: type=1800 audit(1539475611.013:25): pid=5655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.387690] audit: type=1800 audit(1539475611.023:26): pid=5655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.423065] audit: type=1800 audit(1539475611.023:27): pid=5655 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 '10.128.10.6' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 48.195099] IPVS: ftp: loaded support on port[0] = 21 [ 48.233768] WARNING: CPU: 0 PID: 5812 at kernel/cgroup/cgroup.c:2931 cgroup_apply_control_enable+0x22c/0xea0 [ 48.243740] Kernel panic - not syncing: panic_on_warn set ... [ 48.243740] [ 48.251088] CPU: 0 PID: 5812 Comm: syz-executor858 Not tainted 4.19.0-rc6+ #119 [ 48.258516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.267848] Call Trace: [ 48.270421] dump_stack+0x1c4/0x2b4 [ 48.274032] ? dump_stack_print_info.cold.2+0x52/0x52 [ 48.279213] panic+0x238/0x4e7 [ 48.282389] ? add_taint.cold.5+0x16/0x16 [ 48.286611] ? __warn.cold.8+0x148/0x1ba [ 48.290707] ? __warn.cold.8+0x117/0x1ba [ 48.294819] ? cgroup_apply_control_enable+0x22c/0xea0 [ 48.300088] __warn.cold.8+0x163/0x1ba [ 48.303976] ? cgroup_apply_control_enable+0x22c/0xea0 [ 48.309257] report_bug+0x254/0x2d0 [ 48.312874] do_error_trap+0x1fc/0x4d0 [ 48.316753] ? math_error+0x3f0/0x3f0 [ 48.320538] ? kernfs_fop_write+0x204/0x480 [ 48.324844] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.329672] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.334764] ? lock_release+0x970/0x970 [ 48.338790] ? arch_local_save_flags+0x40/0x40 [ 48.343400] ? mark_held_locks+0x130/0x130 [ 48.347631] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.352465] do_invalid_op+0x1b/0x20 [ 48.356166] invalid_op+0x14/0x20 [ 48.359604] RIP: 0010:cgroup_apply_control_enable+0x22c/0xea0 [ 48.365486] Code: 48 c1 e8 03 42 80 3c 28 00 0f 85 18 0a 00 00 49 8b 5f 18 31 ff 83 e3 02 48 89 de e8 5e 60 07 00 48 85 db 74 07 e8 24 5f 07 00 <0f> 0b e8 1d 5f 07 00 48 8b 85 a0 fe ff ff 48 c1 e8 03 42 80 3c 28 [ 48.384375] RSP: 0018:ffff8801bbe97808 EFLAGS: 00010293 [ 48.389724] RAX: ffff8801bbee2040 RBX: 0000000000000002 RCX: ffffffff81777662 [ 48.396973] RDX: 0000000000000000 RSI: ffffffff8177766c RDI: 0000000000000007 [ 48.404230] RBP: ffff8801bbe979b8 R08: ffff8801bbee2040 R09: fffffbfff1277dac [ 48.411488] R10: ffff8801bbe97890 R11: ffffffff893bed67 R12: ffffffff893c50c0 [ 48.418738] R13: dffffc0000000000 R14: 000000000000000b R15: ffff8801d8f08a40 [ 48.426000] ? cgroup_apply_control_enable+0x222/0xea0 [ 48.431267] ? cgroup_apply_control_enable+0x22c/0xea0 [ 48.436531] ? cgroup_apply_control_enable+0x22c/0xea0 [ 48.441798] ? cgroup_mount+0xb70/0xb70 [ 48.445760] ? cgroup_save_control+0x270/0x270 [ 48.450326] ? css_next_descendant_pre+0x77/0x190 [ 48.455152] ? cgroup_propagate_control+0x3ef/0x5c0 [ 48.460163] ? css_next_descendant_pre+0x190/0x190 [ 48.465075] ? css_next_descendant_pre+0x77/0x190 [ 48.469901] cgroup_apply_control+0x1f/0x50 [ 48.474219] cgroup_type_write+0x3bb/0x580 [ 48.478446] ? cgroup_procs_write+0x500/0x500 [ 48.482935] cgroup_file_write+0x2f7/0x7e0 [ 48.487162] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 48.492088] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 48.497000] kernfs_fop_write+0x2ba/0x480 [ 48.501140] __vfs_write+0x119/0x9f0 [ 48.504840] ? kernfs_fop_open+0xf90/0xf90 [ 48.509059] ? kernel_read+0x120/0x120 [ 48.512930] ? lock_release+0x970/0x970 [ 48.516888] ? arch_local_save_flags+0x40/0x40 [ 48.521468] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.526990] ? check_preemption_disabled+0x48/0x200 [ 48.532009] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.537643] ? __sb_start_write+0x1b2/0x370 [ 48.541958] vfs_write+0x1fc/0x560 [ 48.545504] ksys_write+0x101/0x260 [ 48.549121] ? __ia32_sys_read+0xb0/0xb0 [ 48.553169] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 48.558609] __x64_sys_write+0x73/0xb0 [ 48.562488] do_syscall_64+0x1b9/0x820 [ 48.566361] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.571718] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.576632] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.581472] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.586478] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.591487] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.596490] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.601319] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.606495] RIP: 0033:0x441d29 [ 48.609677] Code: e8 cc b2 02 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 48.628564] RSP: 002b:00007ffe2c31df58 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 48.636604] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441d29 [ 48.643855] RDX: 0000000000000009 RSI: 0000000020000140 RDI: 0000000000000006 [ 48.651211] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 48.658470] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000001 [ 48.665721] R13: 000000000000bc4a R14: 0000000000000000 R15: 0000000000000000 [ 48.673861] Kernel Offset: disabled [ 48.677487] Rebooting in 86400 seconds..