INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] 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.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-mmots-kasan-gce-0,10.128.0.58' (ECDSA) to the list of known hosts.
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
executing program
umount(./0/file0) failed (errno 22)
syzkaller login: [   62.355254] WARNING: CPU: 0 PID: 21 at net/xfrm/xfrm_state.c:2322 xfrm_state_fini+0x46a/0x620
[   62.356531] Kernel panic - not syncing: panic_on_warn set ...
[   62.356531] 
[   62.357513] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 4.15.0-rc1-mm1+ #29
[   62.358539] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   62.359800] Workqueue: netns cleanup_net
[   62.360366] Call Trace:
[   62.360724]  dump_stack+0x194/0x257
[   62.361240]  ? arch_local_irq_restore+0x53/0x53
[   62.361866]  ? vsnprintf+0x1ed/0x1900
[   62.362380]  panic+0x1e4/0x41c
[   62.362841]  ? refcount_error_report+0x214/0x214
[   62.363475]  ? show_regs_print_info+0x65/0x65
[   62.364082]  ? __warn+0x1c1/0x200
[   62.364564]  ? xfrm_state_fini+0x46a/0x620
[   62.365132]  __warn+0x1dc/0x200
[   62.365576]  ? xfrm_state_fini+0x46a/0x620
[   62.366144]  report_bug+0x211/0x2d0
[   62.366639]  fixup_bug.part.11+0x37/0x80
[   62.367197]  do_error_trap+0x2d7/0x3e0
[   62.367768]  ? math_error+0x400/0x400
[   62.368302]  ? __local_bh_enable_ip+0x121/0x230
[   62.368927]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   62.369591]  ? xfrm_state_flush+0x557/0x630
[   62.370167]  ? trace_hardirqs_on+0xd/0x10
[   62.370725]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   62.371374]  do_invalid_op+0x1b/0x20
[   62.371891]  invalid_op+0x22/0x40
[   62.372356] RIP: 0010:xfrm_state_fini+0x46a/0x620
[   62.373010] RSP: 0018:ffff8801d9ce70f0 EFLAGS: 00010293
[   62.373720] RAX: ffff8801d9cdc580 RBX: ffff8801cb936040 RCX: ffffffff8463e56a
[   62.374710] RDX: 0000000000000000 RSI: 1ffff1003b39b9d1 RDI: ffffed003b39ce10
[   62.377620] RBP: ffff8801d9ce7248 R08: 1ffff1003b39cda4 R09: 0000000000000000
[   62.384876] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b39ce20
[   62.392113] R13: ffff8801d9ce7220 R14: 1ffff1003b39ce24 R15: ffff8801cb937500
[   62.399372]  ? xfrm_state_fini+0x46a/0x620
[   62.403594]  ? xfrm_state_init+0x4a0/0x4a0
[   62.407808]  ? mark_held_locks+0xb2/0x100
[   62.411935]  ? kfree+0xe4/0x250
[   62.415180]  ? xfrm_sysctl_fini+0x63/0x80
[   62.419304]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   62.424288]  ? trace_hardirqs_on+0xd/0x10
[   62.428405]  ? xfrm_policy_fini+0x550/0x550
[   62.432695]  xfrm_net_exit+0x25/0x30
[   62.436377]  ops_exit_list.isra.6+0xae/0x150
[   62.440757]  cleanup_net+0x5c7/0xb60
[   62.444446]  ? unregister_pernet_device+0x80/0x80
[   62.449266]  ? find_held_lock+0x39/0x1d0
[   62.453298]  ? check_noncircular+0x20/0x20
[   62.457509]  ? process_one_work+0xb2f/0x1bc0
[   62.461897]  ? __lock_is_held+0xbc/0x140
[   62.466344]  process_one_work+0xbfd/0x1bc0
[   62.470563]  ? pwq_dec_nr_in_flight+0x450/0x450
[   62.475198]  ? finish_task_switch+0x1f6/0x740
[   62.479696]  ? __sched_text_start+0x8/0x8
[   62.483819]  ? debug_check_no_locks_freed+0x3d0/0x3d0
[   62.488978]  ? select_task_rq_fair+0x2770/0x2770
[   62.493699]  ? check_noncircular+0x20/0x20
[   62.497915]  ? find_held_lock+0x39/0x1d0
[   62.501963]  ? lock_acquire+0x1d5/0x580
[   62.505904]  ? worker_thread+0x4a3/0x1990
[   62.510025]  ? lock_release+0xda0/0xda0
[   62.513969]  ? worker_pool_assign_id+0x1b0/0x1b0
[   62.518693]  ? do_raw_spin_trylock+0x190/0x190
[   62.523255]  worker_thread+0x223/0x1990
[   62.527214]  ? process_one_work+0x1bc0/0x1bc0
[   62.531688]  ? _raw_spin_unlock_irq+0x27/0x70
[   62.536151]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   62.541134]  ? trace_hardirqs_on+0xd/0x10
[   62.545248]  ? mmdrop+0x18/0x30
[   62.548493]  ? finish_task_switch+0x1f6/0x740
[   62.552958]  ? copy_overflow+0x20/0x20
[   62.556821]  ? __schedule+0x8f3/0x2060
[   62.560673]  ? check_noncircular+0x20/0x20
[   62.564880]  ? find_held_lock+0x39/0x1d0
[   62.568920]  ? find_held_lock+0x39/0x1d0
[   62.572957]  ? lock_downgrade+0x980/0x980
[   62.577072]  ? default_wake_function+0x30/0x50
[   62.581628]  ? __schedule+0x2060/0x2060
[   62.585567]  ? do_wait_intr+0x3e0/0x3e0
[   62.589511]  ? do_raw_spin_trylock+0x190/0x190
[   62.594062]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   62.599134]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   62.604126]  ? trace_hardirqs_on+0xd/0x10
[   62.608241]  ? __kthread_parkme+0x175/0x240
[   62.612533]  kthread+0x37a/0x440
[   62.615868]  ? process_one_work+0x1bc0/0x1bc0
[   62.620328]  ? kthread_stop+0x7b0/0x7b0
[   62.624271]  ret_from_fork+0x24/0x30
[   62.628217] Dumping ftrace buffer:
[   62.631824]    (ftrace buffer empty)
[   62.635502] Kernel Offset: disabled
[   62.639101] Rebooting in 86400 seconds..