[....] Starting enhanced syslogd: rsyslogd[   12.925716] audit: type=1400 audit(1514923301.979:4): avc:  denied  { syslog } for  pid=3174 comm="rsyslogd" capability=34  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
Starting mcstransd: 
[....] Starting file context maintaining daemon: restorecond[?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 '10.128.15.210' (ECDSA) to the list of known hosts.
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syzkaller login: [   24.425834] 
[   24.427475] =====================================
[   24.432282] [ BUG: bad unlock balance detected! ]
[   24.437123] 4.9.73-gf3f3457 #11 Not tainted
[   24.441587] -------------------------------------
[   24.446403] syzkaller114800/3393 is trying to release lock (mrt_lock) at:
[   24.453545] [<ffffffff834e5174>] ipmr_mfc_seq_stop+0xe4/0x140
[   24.459399] but there are no more locks to release!
[   24.464395] 
[   24.464395] other info that might help us debug this:
[   24.471039] 1 lock held by syzkaller114800/3393:
[   24.475768]  #0:  (&p->lock){+.+.+.}, at: [<ffffffff815e651d>] seq_read+0xdd/0x1290
[   24.484009] 
[   24.484009] stack backtrace:
[   24.489345] CPU: 1 PID: 3393 Comm: syzkaller114800 Not tainted 4.9.73-gf3f3457 #11
[   24.497894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   24.507232]  ffff8801c798f878 ffffffff81d922b9 ffffffff849b0638 ffff8801c78d3000
[   24.515218]  ffffffff834e5174 ffffffff849b0638 ffff8801c78d3888 ffff8801c798f8a8
[   24.523219]  ffffffff81235fa4 dffffc0000000000 ffffffff849b0638 00000000ffffffff
[   24.531205] Call Trace:
[   24.533763]  [<ffffffff81d922b9>] dump_stack+0xc1/0x128
[   24.539099]  [<ffffffff834e5174>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   24.545212]  [<ffffffff81235fa4>] print_unlock_imbalance_bug+0x174/0x1a0
[   24.552019]  [<ffffffff8123ea78>] lock_release+0x6f8/0xb80
[   24.557621]  [<ffffffff8153af45>] ? memcpy+0x45/0x50
[   24.562692]  [<ffffffff834e5174>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   24.568805]  [<ffffffff838af11a>] _raw_read_unlock+0x1a/0x50
[   24.574567]  [<ffffffff834e5174>] ipmr_mfc_seq_stop+0xe4/0x140
[   24.582415]  [<ffffffff815e34d7>] traverse+0x3a7/0x900
[   24.589223]  [<ffffffff815e3130>] ? seq_buf_alloc+0x80/0x80
[   24.594901]  [<ffffffff812de20c>] ? futex_wake+0x1ac/0x440
[   24.600490]  [<ffffffff815e6c2a>] seq_read+0x7ea/0x1290
[   24.605819]  [<ffffffff8123a649>] ? __lock_acquire+0x629/0x3640
[   24.611842]  [<ffffffff815e6440>] ? seq_escape+0x200/0x200
[   24.617438]  [<ffffffff81bd906b>] ? avc_has_perm+0x28b/0x4f0
[   24.623201]  [<ffffffff815e6440>] ? seq_escape+0x200/0x200
[   24.628791]  [<ffffffff816bfbbf>] proc_reg_read+0xef/0x170
[   24.634380]  [<ffffffff816bfad0>] ? proc_reg_write+0x170/0x170
[   24.640331]  [<ffffffff81569903>] __vfs_read+0x103/0x670
[   24.645747]  [<ffffffff81569800>] ? default_llseek+0x290/0x290
[   24.651683]  [<ffffffff81640e56>] ? fsnotify+0x86/0xf30
[   24.657014]  [<ffffffff81641d00>] ? fsnotify+0xf30/0xf30
[   24.662429]  [<ffffffff81bd97f9>] ? avc_policy_seqno+0x9/0x20
[   24.668281]  [<ffffffff81bea142>] ? selinux_file_permission+0x82/0x460
[   24.675271]  [<ffffffff81bd08b9>] ? security_file_permission+0x89/0x1e0
[   24.682029]  [<ffffffff8156d3b5>] ? rw_verify_area+0xe5/0x2b0
[   24.687899]  [<ffffffff8156d69e>] vfs_read+0x11e/0x380
[   24.693141]  [<ffffffff8157178f>] SyS_pread64+0x13f/0x170
[   24.698652]  [<ffffffff81571650>] ? SyS_write+0x1b0/0x1b0
[   24.704156]  [<ffffffff82edb2b0>] ? sock_common_setsockopt+0xd0/0xd0
[   24.710615]  [<ffffffff82fda8b0>] ? scm_detach_fds_compat+0x3c0/0x3c0
[   24.717172]  [<ffffffff8111b059>] sys32_pread+0x39/0x50
executing program
[   24.722501]  [<ffffffff8111b020>] ? sys32_waitpid+0x30/0x30
[   24.728181]  [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890
[   24.734293]  [<ffffffff81003036>] ? trace_hardirqs_off_thunk+0x1a/0x1c
[   24.740927]  [<ffffffff838b0be1>] entry_SYSENTER_compat+0x51/0x60