[   16.267146] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[....] 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

syzkaller login: [   21.942828] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.396024] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   23.267291] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available)
[   23.435842] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available)
Warning: Permanently added '10.128.15.216' (ECDSA) to the list of known hosts.
[   28.846012] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available)
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[   29.299633] 
[   29.301304] =====================================
[   29.306111] [ BUG: bad unlock balance detected! ]
[   29.310920] 4.4.107-g610c835 #4 Not tainted
[   29.315213] -------------------------------------
[   29.320024] syzkaller954941/3460 is trying to release lock (mrt_lock) at:
[   29.327167] [<ffffffff833c77d4>] ipmr_mfc_seq_stop+0xe4/0x140
[   29.333019] but there are no more locks to release!
[   29.338003] 
[   29.338003] other info that might help us debug this:
[   29.344653] 1 lock held by syzkaller954941/3460:
[   29.349380]  #0:  (&p->lock){+.+.+.}, at: [<ffffffff8158c38d>] seq_read+0xdd/0x1270
[   29.357713] 
[   29.357713] stack backtrace:
[   29.362178] CPU: 1 PID: 3460 Comm: syzkaller954941 Not tainted 4.4.107-g610c835 #4
[   29.369849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.379176]  0000000000000000 ea37947f912528d3 ffff8800b41af860 ffffffff81d0457d
[   29.387141]  ffffffff8476ab98 ffff8801d0902f80 ffffffff833c77d4 ffffffff8476ab98
[   29.395092]  ffff8801d09037c8 ffff8800b41af890 ffffffff812301a4 dffffc0000000000
[   29.403059] Call Trace:
[   29.405624]  [<ffffffff81d0457d>] dump_stack+0xc1/0x124
[   29.410957]  [<ffffffff833c77d4>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   29.417078]  [<ffffffff812301a4>] print_unlock_imbalance_bug+0x174/0x1a0
[   29.423885]  [<ffffffff8123b04a>] lock_release+0x72a/0xc10
[   29.429477]  [<ffffffff814fafd5>] ? memcpy+0x45/0x50
[   29.434545]  [<ffffffff833c77d4>] ? ipmr_mfc_seq_stop+0xe4/0x140
[   29.440672]  [<ffffffff8377366a>] _raw_read_unlock+0x1a/0x50
[   29.446436]  [<ffffffff833c77d4>] ipmr_mfc_seq_stop+0xe4/0x140
[   29.452373]  [<ffffffff8158b997>] traverse+0x3a7/0x900
[   29.457617]  [<ffffffff8158b5f0>] ? seq_buf_alloc+0x80/0x80
[   29.463302]  [<ffffffff8158ca9a>] seq_read+0x7ea/0x1270
[   29.468632]  [<ffffffff8158c2b0>] ? seq_lseek+0x3c0/0x3c0
[   29.474135]  [<ffffffff81016bec>] ? dump_trace+0x14c/0x350
[   29.479740]  [<ffffffff8158c2b0>] ? seq_lseek+0x3c0/0x3c0
[   29.485245]  [<ffffffff816651ff>] proc_reg_read+0xef/0x170
[   29.490834]  [<ffffffff81665110>] ? proc_reg_write+0x170/0x170
[   29.496772]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   29.502193]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   29.508130]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   29.513549]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   29.518981]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   29.524846]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   29.531576]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   29.538299]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   29.544245]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
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[   29.549489]  [<ffffffff8151f61f>] SyS_pread64+0x13f/0x170
[   29.554991]  [<ffffffff8151f4e0>] ? SyS_write+0x1b0/0x1b0
[   29.560504]  [<ffffffff8135e5d0>] ? recycle_rp_inst+0x2c0/0x2c0
[   29.566539]  [<ffffffff811170a9>] sys32_pread+0x39/0x50
[   29.571870]  [<ffffffff81117070>] ? sys32_waitpid+0x30/0x30
[   29.577549]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   29.583663]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17