[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 26.854859] kauditd_printk_skb: 8 callbacks suppressed [ 26.854871] audit: type=1800 audit(1539479787.282:29): pid=5236 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.882074] audit: type=1800 audit(1539479787.282:30): pid=5236 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. syzkaller login: [ 36.661005] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 36.719079] WARNING: CPU: 0 PID: 5392 at kernel/cgroup/cgroup.c:2935 cgroup_apply_control_enable+0x22c/0xea0 [ 36.729185] Kernel panic - not syncing: panic_on_warn set ... [ 36.729185] [ 36.736555] CPU: 0 PID: 5392 Comm: syz-executor321 Not tainted 4.19.0-rc7+ #282 [ 36.743995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.753345] Call Trace: [ 36.755939] dump_stack+0x1c4/0x2b4 [ 36.759566] ? dump_stack_print_info.cold.2+0x52/0x52 [ 36.764759] panic+0x238/0x4e7 [ 36.767956] ? add_taint.cold.5+0x16/0x16 [ 36.772115] ? __warn.cold.8+0x148/0x1ba [ 36.776164] ? __warn.cold.8+0x117/0x1ba [ 36.780323] ? cgroup_apply_control_enable+0x22c/0xea0 [ 36.785647] __warn.cold.8+0x163/0x1ba [ 36.789551] ? rcu_bh_qs+0xc0/0xc0 [ 36.793207] ? cgroup_apply_control_enable+0x22c/0xea0 [ 36.798492] report_bug+0x254/0x2d0 [ 36.802134] do_error_trap+0x1fc/0x4d0 [ 36.806014] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.811551] ? math_error+0x3f0/0x3f0 [ 36.815363] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.820278] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.825292] ? graph_lock+0x170/0x170 [ 36.829086] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.834661] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.839548] do_invalid_op+0x1b/0x20 [ 36.843266] invalid_op+0x14/0x20 [ 36.846720] RIP: 0010:cgroup_apply_control_enable+0x22c/0xea0 [ 36.852609] 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 0e 64 07 00 48 85 db 74 07 e8 d4 62 07 00 <0f> 0b e8 cd 62 07 00 48 8b 85 a0 fe ff ff 48 c1 e8 03 42 80 3c 28 [ 36.871520] RSP: 0018:ffff8801bacaf7f0 EFLAGS: 00010293 [ 36.876879] RAX: ffff8801cc32e040 RBX: 0000000000000002 RCX: ffffffff81774672 [ 36.884147] RDX: 0000000000000000 RSI: ffffffff8177467c RDI: 0000000000000007 [ 36.891419] RBP: ffff8801bacaf9a0 R08: ffff8801cc32e040 R09: 1ffffffff1273955 [ 36.898808] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffffffff893c5020 [ 36.906105] R13: dffffc0000000000 R14: 000000000000000b R15: ffff8801be223ac0 [ 36.913402] ? cgroup_apply_control_enable+0x222/0xea0 [ 36.918677] ? cgroup_apply_control_enable+0x22c/0xea0 [ 36.924006] ? cgroup_save_control+0x2c0/0x2c0 [ 36.928588] ? css_next_descendant_pre+0x77/0x190 [ 36.933433] ? cgroup_propagate_control+0x3ef/0x5c0 [ 36.938448] ? css_next_descendant_pre+0x190/0x190 [ 36.943373] cgroup_apply_control+0x1f/0x50 [ 36.947737] cgroup_type_write+0x54b/0x710 [ 36.951974] ? cgroup_procs_write+0x500/0x500 [ 36.956515] cgroup_file_write+0x2f7/0x7e0 [ 36.960748] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 36.965685] ? __lock_is_held+0xb5/0x140 [ 36.969752] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 36.974677] kernfs_fop_write+0x2ba/0x480 [ 36.978835] __vfs_write+0x119/0x9f0 [ 36.982563] ? check_preemption_disabled+0x48/0x200 [ 36.987578] ? kernfs_fop_open+0xf90/0xf90 [ 36.991806] ? kernel_read+0x120/0x120 [ 36.995687] ? __lock_is_held+0xb5/0x140 [ 36.999749] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.004763] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.010293] ? __sb_start_write+0x1b2/0x370 [ 37.014610] vfs_write+0x1fc/0x560 [ 37.018242] ksys_write+0x101/0x260 [ 37.021866] ? __ia32_sys_read+0xb0/0xb0 [ 37.026000] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.031451] __x64_sys_write+0x73/0xb0 [ 37.035350] do_syscall_64+0x1b9/0x820 [ 37.039310] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.044675] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.049595] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.054476] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.059494] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.064546] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.069562] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.074403] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.079593] RIP: 0033:0x441c19 [ 37.082785] 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 [ 37.101685] RSP: 002b:00007ffcd731d7a8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 37.109435] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c19 [ 37.110158] kobject: 'regulatory.0' (000000005a4a0adc): kobject_uevent_env [ 37.116713] RDX: 0000000000000009 RSI: 0000000020000140 RDI: 0000000000000006 [ 37.116783] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 37.116791] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000001 [ 37.116800] R13: 0000000000008f4b R14: 0000000000000000 R15: 0000000000000000 [ 37.124285] kobject: 'regulatory.0' (000000005a4a0adc): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 37.139708] Kernel Offset: disabled [ 37.168109] Rebooting in 86400 seconds..