[ 37.370178] audit: type=1800 audit(1549141751.490:25): pid=7657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.389388] audit: type=1800 audit(1549141751.490:26): pid=7657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.409556] audit: type=1800 audit(1549141751.500:27): pid=7657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.444645] audit: type=1800 audit(1549141751.560:28): pid=7657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.169' (ECDSA) to the list of known hosts. syzkaller login: [ 413.705777] IPVS: ftp: loaded support on port[0] = 21 [ 413.709681] IPVS: ftp: loaded support on port[0] = 21 [ 413.718792] IPVS: ftp: loaded support on port[0] = 21 [ 413.719406] IPVS: ftp: loaded support on port[0] = 21 [ 413.728224] IPVS: ftp: loaded support on port[0] = 21 [ 413.740819] 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 [ 414.554043] 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 [ 414.898769] cgroup: fork rejected by pids controller in /syz2 executing program executing program executing program executing program executing program executing program [ 414.947930] cgroup: fork rejected by pids controller in /syz5 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 415.093868] cgroup: fork rejected by pids controller in /syz4 [ 415.115973] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 415.485005] cgroup: fork rejected by pids controller in /syz0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 416.478658] WARNING: CPU: 0 PID: 21 at net/ipv6/xfrm6_tunnel.c:351 xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.488123] Kernel panic - not syncing: panic_on_warn set ... [ 416.494014] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.0.0-rc4+ #57 [ 416.500855] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 416.510215] Workqueue: netns cleanup_net [ 416.514270] Call Trace: [ 416.516865] dump_stack+0x172/0x1f0 [ 416.520503] ? xfrm6_tunnel_net_exit+0x120/0x370 [ 416.525270] panic+0x2cb/0x65c [ 416.528473] ? __warn_printk+0xf3/0xf3 [ 416.532371] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.537149] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 416.542708] ? __warn.cold+0x5/0x45 [ 416.546323] ? __warn+0xe8/0x1d0 [ 416.549678] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.554419] __warn.cold+0x20/0x45 [ 416.557948] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.562698] report_bug+0x263/0x2b0 [ 416.566319] do_error_trap+0x11b/0x200 [ 416.570204] do_invalid_op+0x37/0x50 [ 416.573913] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.578653] invalid_op+0x14/0x20 [ 416.582091] RIP: 0010:xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.587456] 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 ab 06 56 fb 4d 85 f6 74 b3 e8 01 05 56 fb <0f> 0b eb aa 48 81 c3 00 08 00 00 45 31 e4 49 be 00 00 00 00 00 fc [ 416.606341] RSP: 0018:ffff8880a99c7be0 EFLAGS: 00010293 [ 416.611682] RAX: ffff8880a99ba580 RBX: ffff88808e35d7c0 RCX: ffffffff8619d3b5 [ 416.618931] RDX: 0000000000000000 RSI: ffffffff8619d3bf RDI: 0000000000000007 [ 416.626180] RBP: ffff8880a99c7c08 R08: ffff8880a99ba580 R09: ffff8880a99bae70 [ 416.633432] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808e35d878 [ 416.640689] R13: 0000000000000017 R14: ffff8880a4668780 R15: dffffc0000000000 [ 416.647968] ? xfrm6_tunnel_net_exit+0x1d5/0x370 [ 416.652718] ? xfrm6_tunnel_net_exit+0x1df/0x370 [ 416.657473] ? xfrm6_tunnel_alloc_spi+0x920/0x920 [ 416.662307] ops_exit_list.isra.0+0xb0/0x160 [ 416.666700] cleanup_net+0x3fb/0x960 [ 416.670399] ? netns_install+0x1d0/0x1d0 [ 416.674442] ? __lock_is_held+0xb6/0x140 [ 416.678487] ? check_preemption_disabled+0x48/0x290 [ 416.683489] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 416.688929] process_one_work+0x98e/0x1760 [ 416.693162] ? pwq_dec_nr_in_flight+0x320/0x320 [ 416.697818] ? lock_acquire+0x16f/0x3f0 [ 416.701825] worker_thread+0x98/0xe40 [ 416.705618] kthread+0x357/0x430 [ 416.708983] ? process_one_work+0x1760/0x1760 [ 416.713459] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 416.718981] ret_from_fork+0x3a/0x50 [ 416.723986] Kernel Offset: disabled [ 416.727693] Rebooting in 86400 seconds..