[....] 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. [ 26.773267] kauditd_printk_skb: 7 callbacks suppressed [ 26.773278] audit: type=1800 audit(1539513380.003:29): pid=5233 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 [ 26.799988] audit: type=1800 audit(1539513380.003:30): pid=5233 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 '10.128.10.54' (ECDSA) to the list of known hosts. syzkaller login: [ 39.040774] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 39.098164] WARNING: CPU: 1 PID: 5393 at kernel/cgroup/cgroup.c:2935 cgroup_apply_control_enable+0x22c/0xea0 [ 39.108340] Kernel panic - not syncing: panic_on_warn set ... [ 39.108340] [ 39.115710] CPU: 1 PID: 5393 Comm: syz-executor877 Not tainted 4.19.0-rc7+ #283 [ 39.123250] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.132589] Call Trace: [ 39.135172] dump_stack+0x1c4/0x2b4 [ 39.138795] ? dump_stack_print_info.cold.2+0x52/0x52 [ 39.144026] panic+0x238/0x4e7 [ 39.147215] ? add_taint.cold.5+0x16/0x16 [ 39.151372] ? __warn.cold.8+0x148/0x1ba [ 39.155432] ? __warn.cold.8+0x117/0x1ba [ 39.159502] ? cgroup_apply_control_enable+0x22c/0xea0 [ 39.164788] __warn.cold.8+0x163/0x1ba [ 39.168776] ? rcu_bh_qs+0xc0/0xc0 [ 39.172319] ? cgroup_apply_control_enable+0x22c/0xea0 [ 39.177589] report_bug+0x254/0x2d0 [ 39.181302] do_error_trap+0x1fc/0x4d0 [ 39.185192] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.190856] ? math_error+0x3f0/0x3f0 [ 39.194667] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.199501] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.204539] ? graph_lock+0x170/0x170 [ 39.208330] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.213860] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.218692] do_invalid_op+0x1b/0x20 [ 39.222420] invalid_op+0x14/0x20 [ 39.225910] RIP: 0010:cgroup_apply_control_enable+0x22c/0xea0 [ 39.231789] 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 [ 39.250784] RSP: 0018:ffff8801d8b3f7f0 EFLAGS: 00010293 [ 39.256246] RAX: ffff8801bb6da040 RBX: 0000000000000002 RCX: ffffffff81774672 [ 39.263516] RDX: 0000000000000000 RSI: ffffffff8177467c RDI: 0000000000000007 [ 39.270780] RBP: ffff8801d8b3f9a0 R08: ffff8801bb6da040 R09: 1ffffffff1273955 [ 39.278049] R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: ffffffff893c5020 [ 39.285314] R13: dffffc0000000000 R14: 000000000000000b R15: ffff8801bf291d00 [ 39.292720] ? cgroup_apply_control_enable+0x222/0xea0 [ 39.297986] ? cgroup_apply_control_enable+0x22c/0xea0 [ 39.303273] ? cgroup_save_control+0x2c0/0x2c0 [ 39.307848] ? css_next_descendant_pre+0x77/0x190 [ 39.312679] ? cgroup_propagate_control+0x3ef/0x5c0 [ 39.317685] ? css_next_descendant_pre+0x190/0x190 [ 39.322607] cgroup_apply_control+0x1f/0x50 [ 39.326918] cgroup_type_write+0x54b/0x710 [ 39.331149] ? cgroup_procs_write+0x500/0x500 [ 39.335632] cgroup_file_write+0x2f7/0x7e0 [ 39.339881] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 39.344810] ? __lock_is_held+0xb5/0x140 [ 39.348872] ? cgroup_migrate_add_task+0xcd0/0xcd0 [ 39.353922] kernfs_fop_write+0x2ba/0x480 [ 39.358101] __vfs_write+0x119/0x9f0 [ 39.361804] ? check_preemption_disabled+0x48/0x200 [ 39.366818] ? kernfs_fop_open+0xf90/0xf90 [ 39.371057] ? kernel_read+0x120/0x120 [ 39.374944] ? __lock_is_held+0xb5/0x140 [ 39.379006] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.384009] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.389534] ? __sb_start_write+0x1b2/0x370 [ 39.393845] vfs_write+0x1fc/0x560 [ 39.397381] ksys_write+0x101/0x260 [ 39.400996] ? __ia32_sys_read+0xb0/0xb0 [ 39.405049] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 39.410500] __x64_sys_write+0x73/0xb0 [ 39.414387] do_syscall_64+0x1b9/0x820 [ 39.418274] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.423648] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.428573] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.433414] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.438452] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.443472] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.448493] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.453337] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.458514] RIP: 0033:0x441c19 [ 39.461693] 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 [ 39.480700] RSP: 002b:00007ffd82682168 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 39.488415] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c19 [ 39.495689] RDX: 0000000000000009 RSI: 0000000020000140 RDI: 0000000000000006 [ 39.502985] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 39.510350] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000001 [ 39.517624] R13: 0000000000009895 R14: 0000000000000000 R15: 0000000000000000 [ 39.525913] Kernel Offset: disabled [ 39.529611] Rebooting in 86400 seconds..