[ 33.039686] audit: type=1800 audit(1549510940.784:27): pid=7286 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 33.065892] audit: type=1800 audit(1549510940.784:28): pid=7286 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 33.855307] audit: type=1800 audit(1549510941.664:29): pid=7286 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 33.873791] audit: type=1800 audit(1549510941.664:30): pid=7286 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.57' (ECDSA) to the list of known hosts. syzkaller login: [ 51.250043] IPVS: ftp: loaded support on port[0] = 21 [ 51.267543] IPVS: ftp: loaded support on port[0] = 21 [ 51.277153] IPVS: ftp: loaded support on port[0] = 21 [ 51.278059] IPVS: ftp: loaded support on port[0] = 21 [ 51.291601] IPVS: ftp: loaded support on port[0] = 21 executing program [ 51.328163] 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 [ 52.679020] cgroup: fork rejected by pids controller in /syz4 [ 52.681409] cgroup: fork rejected by pids controller in /syz5 [ 52.695138] cgroup: fork rejected by pids controller in /syz1 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.720942] cgroup: fork rejected by pids controller in /syz0 [ 52.726374] cgroup: fork rejected by pids controller in /syz2 [ 52.735432] cgroup: fork rejected by pids controller in /syz3 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 [ 54.164150] WARNING: CPU: 0 PID: 2967 at net/ipv6/xfrm6_tunnel.c:351 xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.173688] Kernel panic - not syncing: panic_on_warn set ... [ 54.179557] CPU: 0 PID: 2967 Comm: kworker/u4:4 Not tainted 5.0.0-rc5 #60 [ 54.186674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.196016] Workqueue: netns cleanup_net [ 54.200186] Call Trace: [ 54.202761] dump_stack+0x172/0x1f0 [ 54.206375] ? xfrm6_tunnel_net_exit+0x120/0x370 [ 54.211126] panic+0x2cb/0x65c [ 54.214297] ? __warn_printk+0xf3/0xf3 [ 54.218165] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.222895] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.228409] ? __warn.cold+0x5/0x45 [ 54.232009] ? __warn+0xe8/0x1d0 [ 54.235356] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.240088] __warn.cold+0x20/0x45 [ 54.243609] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.248346] report_bug+0x263/0x2b0 [ 54.251969] do_error_trap+0x11b/0x200 [ 54.255842] do_invalid_op+0x37/0x50 [ 54.259533] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.264268] invalid_op+0x14/0x20 [ 54.267700] RIP: 0010:xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.273056] Code: 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 0f 85 73 01 00 00 4d 8b 34 24 31 ff 4c 89 f6 e8 0b f9 55 fb 4d 85 f6 74 b3 e8 61 f7 55 fb <0f> 0b eb aa 48 81 c3 00 08 00 00 45 31 e4 49 be 00 00 00 00 00 fc [ 54.291989] RSP: 0018:ffff88809e6afbe0 EFLAGS: 00010293 [ 54.297342] RAX: ffff88809e69a280 RBX: ffff8880867c98c0 RCX: ffffffff8619e3b5 [ 54.304594] RDX: 0000000000000000 RSI: ffffffff8619e3bf RDI: 0000000000000007 [ 54.311844] RBP: ffff88809e6afc08 R08: ffff88809e69a280 R09: ffff88809e69ab70 [ 54.319092] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880867c9978 [ 54.326341] R13: 0000000000000017 R14: ffff88809e3abf80 R15: dffffc0000000000 [ 54.333603] ? xfrm6_tunnel_net_exit+0x1d5/0x370 [ 54.338332] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 54.343068] ? xfrm6_tunnel_alloc_spi+0x920/0x920 [ 54.347890] ops_exit_list.isra.0+0xb0/0x160 [ 54.352277] cleanup_net+0x3fb/0x960 [ 54.356171] ? netns_install+0x1d0/0x1d0 [ 54.360302] ? __lock_is_held+0xb6/0x140 [ 54.364548] ? check_preemption_disabled+0x48/0x290 [ 54.369558] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 54.374993] process_one_work+0x98e/0x1790 [ 54.379213] ? pwq_dec_nr_in_flight+0x320/0x320 [ 54.383874] ? lock_acquire+0x16f/0x3f0 [ 54.387951] worker_thread+0x98/0xe40 [ 54.391736] ? trace_hardirqs_on+0x67/0x230 [ 54.396046] kthread+0x357/0x430 [ 54.399395] ? process_one_work+0x1790/0x1790 [ 54.403868] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 54.409559] ret_from_fork+0x3a/0x50 [ 54.414609] Kernel Offset: disabled [ 54.418311] Rebooting in 86400 seconds..