[....] 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: [   15.644468] random: sshd: uninitialized urandom read (32 bytes read)
[   16.012776] audit: type=1400 audit(1572737342.249:6): avc:  denied  { map } for  pid=1758 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
[   16.062503] random: sshd: uninitialized urandom read (32 bytes read)
[   16.560900] random: sshd: uninitialized urandom read (32 bytes read)
[   16.722620] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.1.44' (ECDSA) to the list of known hosts.
[   22.266815] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   22.366105] audit: type=1400 audit(1572737348.599:7): avc:  denied  { map } for  pid=1770 comm="syz-executor412" path="/root/syz-executor412453714" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   22.368282] 
[   22.394035] =============================
[   22.398163] WARNING: suspicious RCU usage
[   22.402477] 4.14.151+ #0 Not tainted
[   22.406203] -----------------------------
[   22.410522] ./include/linux/radix-tree.h:238 suspicious rcu_dereference_check() usage!
[   22.418588] 
[   22.418588] other info that might help us debug this:
[   22.418588] 
[   22.426820] 
[   22.426820] rcu_scheduler_active = 2, debug_locks = 1
[   22.433479] 2 locks held by syz-executor412/1770:
[   22.438320]  #0:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<        (ptrval)>] shmem_add_seals+0x12b/0xf80
[   22.448219]  #1:  (&(&mapping->tree_lock)->rlock){-...}, at: [<        (ptrval)>] shmem_add_seals+0x2e1/0xf80
[   22.458495] 
[   22.458495] stack backtrace:
[   22.463756] CPU: 0 PID: 1770 Comm: syz-executor412 Not tainted 4.14.151+ #0
[   22.471568] Call Trace:
[   22.474533]  dump_stack+0xca/0x134
[   22.478703]  shmem_add_seals+0x9d2/0xf80
[   22.483125]  ? shmem_file_llseek+0x220/0x220
[   22.488010]  ? vfs_write+0x35d/0x4d0
[   22.492016]  ? check_preemption_disabled+0x35/0x1f0
[   22.497091]  shmem_fcntl+0xea/0x120
[   22.500757]  do_fcntl+0x5c8/0xd20
[   22.504438]  ? f_getown+0xa0/0xa0
[   22.507884]  ? vfs_write+0x319/0x4d0
[   22.511592]  ? selinux_file_fcntl+0x86/0x140
[   22.515998]  SyS_fcntl+0xc6/0x100
[   22.519520]  ? do_fcntl+0xd20/0xd20
[   22.523139]  do_syscall_64+0x19b/0x520
[   22.527021]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   22.532290] RIP: 0033:0x440189
[   22.535605] RSP: 002b:00007ffe62fe6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
[   22.543472] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440189
[   22.550789] RDX: 0000000000000008 RSI: 0000000000000409 RDI: 0000000000000003
[   22.558060] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   22.565335] R10: