[....] 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. [ 27.086217] kauditd_printk_skb: 7 callbacks suppressed [ 27.086229] audit: type=1800 audit(1539518188.417:29): pid=5430 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 [ 27.118727] audit: type=1800 audit(1539518188.417:30): pid=5430 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 '10.128.0.8' (ECDSA) to the list of known hosts. syzkaller login: [ 39.862062] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 39.919322] WARNING: CPU: 1 PID: 5587 at kernel/cgroup/cgroup.c:3077 cgroup_apply_control_enable+0x22c/0xea0 [ 39.929404] Kernel panic - not syncing: panic_on_warn set ... [ 39.929404] [ 39.936826] CPU: 1 PID: 5587 Comm: syz-executor599 Not tainted 4.19.0-rc7-next-20181012+ #93 [ 39.945392] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.954729] Call Trace: [ 39.957312] dump_stack+0x244/0x3ab [ 39.960973] ? dump_stack_print_info.cold.2+0x52/0x52 [ 39.966178] panic+0x238/0x4e7 [ 39.969439] ? add_taint.cold.5+0x16/0x16 [ 39.973582] ? __warn.cold.8+0x148/0x1ba [ 39.977742] ? __warn.cold.8+0x117/0x1ba [ 39.981809] ? cgroup_apply_control_enable+0x22c/0xea0 [ 39.987067] __warn.cold.8+0x163/0x1ba [ 39.990941] ? rcu_softirq_qs+0x20/0x20 [ 39.994903] ? cgroup_apply_control_enable+0x22c/0xea0 [ 40.000172] report_bug+0x254/0x2d0 [ 40.003789] do_error_trap+0x11b/0x200 [ 40.007660] do_invalid_op+0x36/0x40 [ 40.011357] ? cgroup_apply_control_enable+0x22c/0xea0 [ 40.016813] invalid_op+0x14/0x20 [ 40.020261] RIP: 0010:cgroup_apply_control_enable+0x22c/0xea0 [ 40.026133] 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 de 7e 07 00 48 85 db 74 07 e8 a4 7d 07 00 <0f> 0b e8 9d 7d 07 00 48 8b 85 a0 fe ff ff 48 c1 e8 03 42 80 3c 28 [ 40.045018] RSP: 0018:ffff8801bae277f0 EFLAGS: 00010293 [ 40.050384] RAX: ffff8801d7c82040 RBX: 0000000000000002 RCX: ffffffff8176eca2 [ 40.057657] RDX: 0000000000000000 RSI: ffffffff8176ecac RDI: 0000000000000007 [ 40.064926] RBP: ffff8801bae279a0 R08: ffff8801d7c82040 R09: ffffed003b5e5b4f [ 40.072184] R10: ffffed003b5e5b4f R11: ffff8801daf2da7b R12: ffffffff893c20c0 [ 40.079442] R13: dffffc0000000000 R14: 000000000000000b R15: ffff8801bf1900c0 [ 40.086735] ? cgroup_apply_control_enable+0x222/0xea0 [ 40.092008] ? cgroup_apply_control_enable+0x22c/0xea0 [ 40.097286] ? cgroup_save_control+0x2c0/0x2c0 [ 40.101855] ? css_next_descendant_pre+0x77/0x190 [ 40.106723] ? cgroup_propagate_control+0x3ef/0x5c0 [ 40.111740] ? css_next_descendant_pre+0x190/0x190 [ 40.116678] cgroup_apply_control+0x1f/0x50 [ 40.120986] cgroup_type_write+0x54b/0x710 [ 40.125236] ? cgroup_procs_write+0x500/0x500 [ 40.129716] cgroup_file_write+0x2f7/0x7e0 [ 40.134013] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 40.138957] ? __lock_is_held+0xb5/0x140 [ 40.143021] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 40.147947] kernfs_fop_write+0x2ba/0x480 [ 40.152083] __vfs_write+0x119/0x9f0 [ 40.155790] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.161326] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 40.166238] ? kernel_read+0x120/0x120 [ 40.170110] ? __lock_is_held+0xb5/0x140 [ 40.174161] ? rcu_read_lock_sched_held+0x14f/0x180 [ 40.179159] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.184684] ? __sb_start_write+0x1b2/0x370 [ 40.189013] vfs_write+0x1fc/0x560 [ 40.192549] ksys_write+0x101/0x260 [ 40.196170] ? __ia32_sys_read+0xb0/0xb0 [ 40.200224] ? trace_hardirqs_off_caller+0x300/0x300 [ 40.205311] __x64_sys_write+0x73/0xb0 [ 40.209186] do_syscall_64+0x1b9/0x820 [ 40.213089] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.218437] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.223352] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.228191] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.233299] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.238306] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.243309] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.248143] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.253423] RIP: 0033:0x441c19 [ 40.256670] 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 [ 40.275768] RSP: 002b:00007fff9b714978 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 40.283469] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c19 [ 40.290827] RDX: 0000000000000009 RSI: 0000000020000140 RDI: 0000000000000006 [ 40.298084] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 40.305358] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000001 [ 40.312678] R13: 0000000000009bdf R14: 0000000000000000 R15: 0000000000000000 [ 40.321105] Kernel Offset: disabled [ 40.324811] Rebooting in 86400 seconds..