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-6,10.128.15.203' (ECDSA) to the list of known hosts.
2017/12/04 14:38:31 parsed 1 programs
2017/12/04 14:38:31 executed programs: 0
syzkaller login: [   41.680491] IPVS: Creating netns size=2536 id=1
2017/12/04 14:38:36 executed programs: 222
[   49.154496] 
[   49.156140] =====================================
[   49.160952] [ BUG: bad unlock balance detected! ]
[   49.165770] 4.9.66-gb763480 #103 Not tainted
[   49.165771] -------------------------------------
[   49.165776] syz-executor0/4291 is trying to release lock (mrt_lock) at:
[   49.165785] [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   49.165792] but there are no more locks to release!
[   49.165793] 
[   49.165793] other info that might help us debug this:
[   49.165795] 1 lock held by syz-executor0/4291:
[   49.165805]  #0:  (&p->lock){+.+.+.}, at: [<ffffffff815e4d1d>] seq_read+0xdd/0x1290
[   49.165806] 
[   49.165806] stack backtrace:
[   49.165810] CPU: 0 PID: 4291 Comm: syz-executor0 Not tainted 4.9.66-gb763480 #103
[   49.165812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.165818]  ffff8801d19f7918 ffffffff81d90749 ffffffff849ae878 ffff8801d0de4800
[   49.165823]  ffffffff834dec54 ffffffff849ae878 ffff8801d0de5088 ffff8801d19f7948
[   49.165828]  ffffffff812353f4 dffffc0000000000 ffffffff849ae878 00000000ffffffff
[   49.165829] Call Trace:
[   49.165835]  [<ffffffff81d90749>] dump_stack+0xc1/0x128
[   49.165839]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   49.165845]  [<ffffffff812353f4>] print_unlock_imbalance_bug+0x174/0x1a0
[   49.165849]  [<ffffffff8123dec8>] lock_release+0x6f8/0xb80
[   49.165856]  [<ffffffff838aa3b9>] ? retint_kernel+0x2d/0x2d
[   49.165859]  [<ffffffff834dec54>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   49.165863]  [<ffffffff838a951a>] _raw_read_unlock+0x1a/0x50
[   49.165866]  [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140
[   49.165870]  [<ffffffff815e1cd7>] traverse+0x3a7/0x900
[   49.165873]  [<ffffffff815e1930>] ? seq_buf_alloc+0x80/0x80
[   49.165877]  [<ffffffff815e542a>] seq_read+0x7ea/0x1290
[   49.165881]  [<ffffffff815e4c40>] ? seq_escape+0x200/0x200
[   49.165885]  [<ffffffff81536412>] ? kmem_cache_free+0xb2/0x2e0
[   49.165890]  [<ffffffff812e1218>] ? do_futex+0x3f8/0x15c0
[   49.165894]  [<ffffffff81232141>] ? __lock_is_held+0xa1/0xf0
[   49.165897]  [<ffffffff815e4c40>] ? seq_escape+0x200/0x200
[   49.165902]  [<ffffffff816be36f>] proc_reg_read+0xef/0x170
[   49.165905]  [<ffffffff816be280>] ? proc_reg_write+0x170/0x170
[   49.165910]  [<ffffffff81568113>] __vfs_read+0x103/0x670
[   49.165913]  [<ffffffff81568010>] ? default_llseek+0x290/0x290
[   49.165918]  [<ffffffff8163f626>] ? fsnotify+0x86/0xf30
[   49.165922]  [<ffffffff816404d0>] ? fsnotify+0xf30/0xf30
[   49.165927]  [<ffffffff81bd7da9>] ? avc_policy_seqno+0x9/0x20
[   49.165931]  [<ffffffff81be86f2>] ? selinux_file_permission+0x82/0x460
[   49.165936]  [<ffffffff81bcee69>] ? security_file_permission+0x89/0x1e0
[   49.165940]  [<ffffffff8156bbc5>] ? rw_verify_area+0xe5/0x2b0
[   49.165943]  [<ffffffff8156beae>] vfs_read+0x11e/0x380
[   49.165947]  [<ffffffff8156ff9f>] SyS_pread64+0x13f/0x170
[   49.165950]  [<ffffffff8156fe60>] ? SyS_write+0x1b0/0x1b0
[   49.165954]  [<ffffffff81238c3b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   49.165958]  [<ffffffff8100301a>] ? trace_hardirqs_on_thunk+0x1a/0x1c
[   49.165963]  [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6