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-android-49-kasan-gce-1,10.128.15.228' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.799570] 
[   33.799923] =====================================
[   33.800591] [ BUG: bad unlock balance detected! ]
[   33.801249] 4.9.66-gb763480 #103 Not tainted
[   33.801830] -------------------------------------
[   33.802504] syzkaller548511/3276 is trying to release lock (mrt_lock) at:
[   33.803543] [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   33.804382] but there are no more locks to release!
[   33.805043] 
[   33.805043] other info that might help us debug this:
[   33.806079] 1 lock held by syzkaller548511/3276:
[   33.806727]  #0:  (&p->lock){+.+.+.}, at: [<ffffffff815e4d1d>] seq_read+0xdd/0x1290
[   33.807894] 
[   33.807894] stack backtrace:
[   33.808493] CPU: 0 PID: 3276 Comm: syzkaller548511 Not tainted 4.9.66-gb763480 #103
[   33.809521] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.810777]  ffff8801c7f07918 ffffffff81d90749 ffffffff849ae878 ffff8801c6ef1800
[   33.811926]  ffffffff834dec54 ffffffff849ae878 ffff8801c6ef2088 ffff8801c7f07948
[   33.813064]  ffffffff812353f4 dffffc0000000000 ffffffff849ae878 00000000ffffffff
[   33.814220] Call Trace:
[   33.814576]  [<ffffffff81d90749>] dump_stack+0xc1/0x128
[   33.815303]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   33.816116]  [<ffffffff812353f4>] print_unlock_imbalance_bug+0x174/0x1a0
[   33.817036]  [<ffffffff8123dec8>] lock_release+0x6f8/0xb80
[   33.817824]  [<ffffffff81539a15>] ? memcpy+0x45/0x50
[   33.818528]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   33.819359]  [<ffffffff838a951a>] _raw_read_unlock+0x1a/0x50
[   33.820127]  [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   33.826124]  [<ffffffff815e1cd7>] traverse+0x3a7/0x900
[   33.831384]  [<ffffffff815e1930>] ? seq_buf_alloc+0x80/0x80
[   33.837072]  [<ffffffff815e542a>] seq_read+0x7ea/0x1290
[   33.842409]  [<ffffffff81239a99>] ? __lock_acquire+0x629/0x3640
[   33.848434]  [<ffffffff815e4c40>] ? seq_escape+0x200/0x200
[   33.854024]  [<ffffffff815e4c40>] ? seq_escape+0x200/0x200
[   33.859614]  [<ffffffff816be36f>] proc_reg_read+0xef/0x170
[   33.865202]  [<ffffffff816be280>] ? proc_reg_write+0x170/0x170
[   33.871141]  [<ffffffff81568113>] __vfs_read+0x103/0x670
[   33.876553]  [<ffffffff81568010>] ? default_llseek+0x290/0x290
[   33.882490]  [<ffffffff8163f626>] ? fsnotify+0x86/0xf30
[   33.887817]  [<ffffffff816404d0>] ? fsnotify+0xf30/0xf30
[   33.893236]  [<ffffffff81bd7da9>] ? avc_policy_seqno+0x9/0x20
[   33.899086]  [<ffffffff81be86f2>] ? selinux_file_permission+0x82/0x460
[   33.905718]  [<ffffffff81bcee69>] ? security_file_permission+0x89/0x1e0
[   33.912433]  [<ffffffff8156bbc5>] ? rw_verify_area+0xe5/0x2b0
[   33.918283]  [<ffffffff8156beae>] vfs_read+0x11e/0x380
[   33.923524]  [<ffffffff8156ff9f>] SyS_pread64+0x13f/0x170
[   33.929025]  [<ffffffff8156fe60>] ? SyS_write+0x1b0/0x1b0
[   33.934528]  [<ffffffff81238c3b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   33.941331]  [<ffffffff8100301a>] ? trace_hardirqs_on_thunk+0x1a/0x1c
[   33.947876]  [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
executing program