[....] Starting OpenBSD Secure Shell server: sshd[   11.202763] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   14.398256] random: sshd: uninitialized urandom read (32 bytes read)
[   14.703811] audit: type=1400 audit(1572740578.088:6): avc:  denied  { map } for  pid=1763 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
[   14.751280] random: sshd: uninitialized urandom read (32 bytes read)
[   15.284047] random: sshd: uninitialized urandom read (32 bytes read)
[   15.443174] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts.
[   21.004336] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   21.101576] audit: type=1400 audit(1572740584.488:7): avc:  denied  { map } for  pid=1775 comm="syz-executor592" path="/root/syz-executor592746097" 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
[   21.160958] 
[   21.162680] =============================
[   21.166798] WARNING: suspicious RCU usage
[   21.170921] 4.14.151+ #0 Not tainted
[   21.174621] -----------------------------
[   21.178756] ./include/linux/radix-tree.h:238 suspicious rcu_dereference_check() usage!
[   21.186782] 
[   21.186782] other info that might help us debug this:
[   21.186782] 
[   21.194899] 
[   21.194899] rcu_scheduler_active = 2, debug_locks = 1
[   21.201540] 2 locks held by syz-executor592/1775:
[   21.206354]  #0:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<        (ptrval)>] shmem_add_seals+0x12b/0xf80
[   21.216246]  #1:  (&(&mapping->tree_lock)->rlock){-...}, at: [<        (ptrval)>] shmem_add_seals+0x2e1/0xf80
[   21.226379] 
[   21.226379] stack backtrace:
[   21.230849] CPU: 0 PID: 1775 Comm: syz-executor592 Not tainted 4.14.151+ #0
[   21.238008] Call Trace:
[   21.240577]  dump_stack+0xca/0x134
[   21.244106]  shmem_add_seals+0x9d2/0xf80
[   21.248152]  ? shmem_file_llseek+0x220/0x220
[   21.252542]  ? vfs_write+0x35d/0x4d0
[   21.256320]  ? check_preemption_disabled+0x35/0x1f0
[   21.261325]  shmem_fcntl+0xea/0x120
[   21.264939]  do_fcntl+0x5c8/0xd20
[   21.268370]  ? f_getown+0xa0/0xa0
[   21.271887]  ? vfs_write+0x319/0x4d0
[   21.275583]  ? selinux_file_fcntl+0x86/0x140
[   21.279982]  SyS_fcntl+0xc6/0x100
[   21.283411]  ? do_fcntl+0xd20/0xd20
[   21.287015]  do_syscall_64+0x19b/0x520
[   21.290896]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   21.296069] RIP: 0033:0x440159
[   21.299234] RSP: 002b:00007ffc2e216748 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
[   21.307010] RAX: ffffffffffffffda RBX: 0000000000400