[ 33.563650] audit: type=1800 audit(1548042271.879:27): pid=7320 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 33.582970] audit: type=1800 audit(1548042271.879:28): pid=7320 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. [ 34.016964] audit: type=1800 audit(1548042272.399:29): pid=7320 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 34.040955] audit: type=1800 audit(1548042272.409:30): pid=7320 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 '10.128.10.12' (ECDSA) to the list of known hosts. syzkaller login: [ 62.577425] IPVS: ftp: loaded support on port[0] = 21 [ 62.577431] IPVS: ftp: loaded support on port[0] = 21 [ 62.593438] IPVS: ftp: loaded support on port[0] = 21 [ 62.595609] IPVS: ftp: loaded support on port[0] = 21 [ 62.602222] IPVS: ftp: loaded support on port[0] = 21 [ 62.610859] 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 [ 63.479844] cgroup: fork rejected by pids controller in /syz5 executing program executing program executing program [ 63.523871] cgroup: fork rejected by pids controller in /syz1 [ 63.532153] cgroup: fork rejected by pids controller in /syz0 executing program executing program executing program executing program executing program [ 63.587431] cgroup: fork rejected by pids controller in /syz4 [ 63.603790] cgroup: fork rejected by pids controller in /syz2 executing program executing program executing program executing program executing program [ 63.630544] 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 [ 65.019135] WARNING: CPU: 0 PID: 7 at net/ipv6/xfrm6_tunnel.c:351 xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.028575] Kernel panic - not syncing: panic_on_warn set ... [ 65.034437] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.0.0-rc2+ #35 [ 65.041163] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.050511] Workqueue: netns cleanup_net [ 65.054545] Call Trace: [ 65.057109] dump_stack+0x1db/0x2d0 [ 65.060717] ? dump_stack_print_info.cold+0x20/0x20 [ 65.065718] ? xfrm6_tunnel_net_exit+0x1f0/0x500 [ 65.070455] panic+0x2cb/0x65c [ 65.073624] ? add_taint.cold+0x16/0x16 [ 65.077574] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.082306] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.087819] ? __probe_kernel_read+0x1f4/0x250 [ 65.092380] ? __warn.cold+0x5/0x48 [ 65.096012] ? __warn+0xe8/0x1d0 [ 65.099372] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.104118] __warn.cold+0x20/0x48 [ 65.107635] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.112381] report_bug+0x263/0x2b0 [ 65.115992] do_error_trap+0x11b/0x200 [ 65.119858] do_invalid_op+0x37/0x50 [ 65.123549] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.128292] invalid_op+0x14/0x20 [ 65.131732] RIP: 0010:xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.137069] Code: 80 7d 00 00 4c 8b 3b 0f 85 f4 01 00 00 4d 89 7e 80 31 ff 4c 89 fe 41 c6 45 00 f8 e8 bf 53 a0 fa 4d 85 ff 74 92 e8 15 52 a0 fa <0f> 0b eb 89 48 8b 9d 30 ff ff ff 49 8d 46 a0 45 31 e4 49 89 c5 48 [ 65.155947] RSP: 0018:ffff8880a944f748 EFLAGS: 00010293 [ 65.161285] RAX: ffff8880a94401c0 RBX: ffff888092d66238 RCX: ffffffff86e1acd1 [ 65.168531] RDX: 0000000000000000 RSI: ffffffff86e1acdb RDI: 0000000000000007 [ 65.175774] RBP: ffff8880a944f828 R08: ffff8880a94401c0 R09: ffff8880a9440ab0 [ 65.183024] R10: ffff8880a94401c0 R11: 0000000000000000 R12: 00000000000000ff [ 65.190284] R13: ffffed1015289ef0 R14: ffff8880a944f800 R15: ffff8880a13d5700 [ 65.197568] ? xfrm6_tunnel_net_exit+0x2c1/0x500 [ 65.202301] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.207036] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 65.211772] ? xfrm6_tunnel_alloc_spi+0xc60/0xc60 [ 65.216592] ? xt_proto_init+0x850/0x850 [ 65.220633] ? calibrate_delay+0xd35/0x1056 [ 65.224944] ? inet_frag_destroy_rcu+0xf0/0xf0 [ 65.229520] ? xfrm6_tunnel_alloc_spi+0xc60/0xc60 [ 65.234351] ops_exit_list.isra.0+0xb0/0x160 [ 65.238765] cleanup_net+0x51d/0xb10 [ 65.242453] ? find_held_lock+0x35/0x120 [ 65.246493] ? netns_install+0x1d0/0x1d0 [ 65.250533] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.256048] ? check_preemption_disabled+0x48/0x290 [ 65.261047] ? __lock_is_held+0xb6/0x140 [ 65.265094] process_one_work+0xd0c/0x1ce0 [ 65.269310] ? preempt_notifier_register+0x200/0x200 [ 65.274396] ? __switch_to_asm+0x34/0x70 [ 65.278464] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 65.283374] ? __schedule+0x89f/0x1e60 [ 65.287241] ? pci_mmcfg_check_reserved+0x170/0x170 [ 65.292238] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.296977] ? worker_thread+0x3b7/0x14a0 [ 65.301111] ? find_held_lock+0x35/0x120 [ 65.305162] ? lock_acquire+0x1db/0x570 [ 65.309201] ? worker_thread+0x3cd/0x14a0 [ 65.313335] ? kasan_check_read+0x11/0x20 [ 65.317462] ? do_raw_spin_lock+0x156/0x360 [ 65.321771] ? lock_release+0xc40/0xc40 [ 65.325724] ? rwlock_bug.part.0+0x90/0x90 [ 65.329937] ? trace_hardirqs_on_caller+0x310/0x310 [ 65.334940] worker_thread+0x143/0x14a0 [ 65.338904] ? process_one_work+0x1ce0/0x1ce0 [ 65.343382] ? __kthread_parkme+0xc3/0x1b0 [ 65.347612] ? lock_acquire+0x1db/0x570 [ 65.351565] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 65.356677] ? lockdep_hardirqs_on+0x415/0x5d0 [ 65.361236] ? trace_hardirqs_on+0xbd/0x310 [ 65.365532] ? __kthread_parkme+0xc3/0x1b0 [ 65.369759] ? trace_hardirqs_off_caller+0x300/0x300 [ 65.374839] ? do_raw_spin_trylock+0x270/0x270 [ 65.379396] ? schedule+0x108/0x350 [ 65.383002] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 65.388093] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 65.393622] ? __kthread_parkme+0xfb/0x1b0 [ 65.397839] kthread+0x357/0x430 [ 65.401198] ? process_one_work+0x1ce0/0x1ce0 [ 65.405677] ? kthread_stop+0x920/0x920 [ 65.409628] ret_from_fork+0x3a/0x50 [ 65.414649] Kernel Offset: disabled [ 65.418401] Rebooting in 86400 seconds..