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-3,10.128.15.235' (ECDSA) to the list of known hosts.
executing program
executing program
syzkaller login: [   58.028639] 
[   58.028938] =====================================
[   58.029592] [ BUG: bad unlock balance detected! ]
[   58.030231] 4.9.67-gf26d3c7 #106 Not tainted
[   58.030814] -------------------------------------
[   58.031487] syzkaller997769/3309 is trying to release lock (mrt_lock) at:
[   58.032471] [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   58.033242] but there are no more locks to release!
[   58.033905] 
[   58.033905] other info that might help us debug this:
[   58.034804] 1 lock held by syzkaller997769/3309:
[   58.035447]  #0:  (&p->lock){+.+.+.}, at: [<ffffffff815e4cdd>] seq_read+0xdd/0x1290
[   58.036627] 
[   58.036627] stack backtrace:
[   58.037226] CPU: 1 PID: 3309 Comm: syzkaller997769 Not tainted 4.9.67-gf26d3c7 #106
[   58.038241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.039463]  ffff8801d1857918 ffffffff81d906e9 ffffffff849ae8f8 ffff8801d18b1800
[   58.040586]  ffffffff834dec54 ffffffff849ae8f8 ffff8801d18b2088 ffff8801d1857948
[   58.041708]  ffffffff812353f4 dffffc0000000000 ffffffff849ae8f8 00000000ffffffff
[   58.042830] Call Trace:
[   58.043184]  [<ffffffff81d906e9>] dump_stack+0xc1/0x128
[   58.043891]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   58.044700]  [<ffffffff812353f4>] print_unlock_imbalance_bug+0x174/0x1a0
[   58.045611]  [<ffffffff8123dec8>] lock_release+0x6f8/0xb80
[   58.046354]  [<ffffffff815399b5>] ? memcpy+0x45/0x50
[   58.047027]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   58.047861]  [<ffffffff838a951a>] _raw_read_unlock+0x1a/0x50
[   58.048624]  [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   58.053900]  [<ffffffff815e1c97>] traverse+0x3a7/0x900
[   58.059139]  [<ffffffff815e18f0>] ? seq_buf_alloc+0x80/0x80
[   58.064814]  [<ffffffff815e53ea>] seq_read+0x7ea/0x1290
[   58.070154]  [<ffffffff81239a99>] ? __lock_acquire+0x629/0x3640
executing program
[   58.076175]  [<ffffffff815e4c00>] ? seq_escape+0x200/0x200
[   58.081762]  [<ffffffff815e4c00>] ? seq_escape+0x200/0x200
[   58.087348]  [<ffffffff816be32f>] proc_reg_read+0xef/0x170
[   58.092934]  [<ffffffff816be240>] ? proc_reg_write+0x170/0x170
[   58.098867]  [<ffffffff815680d3>] __vfs_read+0x103/0x670
[   58.104280]  [<ffffffff81567fd0>] ? default_llseek+0x290/0x290
[   58.110216]  [<ffffffff8163f5e6>] ? fsnotify+0x86/0xf30
[   58.115543]  [<ffffffff81640490>] ? fsnotify+0xf30/0xf30
[   58.120955]  [<ffffffff81bd7d59>] ? avc_policy_seqno+0x9/0x20
[   58.126801]  [<ffffffff81be86a2>] ? selinux_file_permission+0x82/0x460
[   58.133430]  [<ffffffff81bcee19>] ? security_file_permission+0x89/0x1e0
[   58.140144]  [<ffffffff8156bb85>] ? rw_verify_area+0xe5/0x2b0
[   58.145989]  [<ffffffff8156be6e>] vfs_read+0x11e/0x380
[   58.151229]  [<ffffffff8156ff5f>] SyS_pread64+0x13f/0x170
[   58.156731]  [<ffffffff8156fe20>] ? SyS_write+0x1b0/0x1b0
[   58.162230]  [<ffffffff81238c3b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   58.169033]  [<ffffffff8100301a>] ? trace_hardirqs_on_thunk+0x1a/0x1c
[   58.175576]  [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
executing program
executing program
executing program