[....] Starting OpenBSD Secure Shell server: sshd[   11.234019] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.791619] random: sshd: uninitialized urandom read (32 bytes read)
[   23.146189] audit: type=1400 audit(1554217054.883:6): avc:  denied  { map } for  pid=1770 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
[   23.207944] random: sshd: uninitialized urandom read (32 bytes read)
[   23.716733] random: sshd: uninitialized urandom read (32 bytes read)
[   38.491644] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.140' (ECDSA) to the list of known hosts.
[   44.038342] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   44.131913] audit: type=1400 audit(1554217075.873:7): avc:  denied  { map } for  pid=1794 comm="syz-executor431" path="/root/syz-executor431875882" dev="sda1" ino=16351 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   44.191265] VFS: brelse: Trying to free free buffer
[   44.196400] ------------[ cut here ]------------
[   44.201160] WARNING: CPU: 1 PID: 1794 at fs/buffer.c:1206 __brelse.cold+0x11/0x18
[   44.208774] Kernel panic - not syncing: panic_on_warn set ...
[   44.208774] 
[   44.216136] CPU: 1 PID: 1794 Comm: syz-executor431 Not tainted 4.14.109+ #46
[   44.223308] Call Trace:
[   44.225894]  dump_stack+0xb9/0x10e
[   44.229492]  panic+0x1d9/0x3c2
[   44.232715]  ? add_taint.cold+0x16/0x16
[   44.237082]  ? __brelse.cold+0x11/0x18
[   44.241052]  ? __probe_kernel_read+0x163/0x1c0
[   44.245629]  ? __brelse.cold+0x11/0x18
[   44.249505]  __warn.cold+0x2f/0x3b
[   44.253043]  ? check_preemption_disabled+0x35/0x1f0
[   44.258071]  ? __brelse.cold+0x11/0x18
[   44.262050]  ? report_bug+0x20a/0x248
[   44.266076]  ? do_error_trap+0x1bf/0x2d0
[   44.270178]  ? math_error+0x2d0/0x2d0
[   44.273996]  ? vprintk_emit+0xd5/0x330
[   44.277950]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.282800]  ? invalid_op+0x18/0x40
[   44.286468]  ? __brelse.cold+0x11/0x18
[   44.290399]  ? ext4_ind_remove_space+0xe15/0x11d0
[   44.295290]  ? lock_downgrade+0x5d0/0x5d0
[   44.299461]  ? ext4_ind_truncate+0x8b0/0x8b0
[   44.303950]  ? __es_remove_extent+0x443/0x620
[   44.308463]  ? ext4_es_remove_extent+0xaa/0x310
[   44.313136]  ? _raw_write_unlock+0x29/0x40
[   44.317368]  ? ext4_punch_hole+0xd25/0x1030
[   44.321735]  ? ext4_fallocate+0x352/0x1e00
[   44.325974]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   44.331468]  ? rcu_read_lock_sched_held+0x10a/0x130
[   44.336483]  ? ext4_insert_range+0x1170/0x1170
[   44.341186]  ? vfs_fallocate+0x348/0x790
[   44.345332]  ? SyS_fallocate+0x4a/0x80
[   44.349210]  ? compat_SyS_ftruncate+0x20/0x20
[   44.353743]  ? do_syscall_64+0x19b/0x4b0
[   44.357813]  ? entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   44.363634] Kernel Offset: 0x35200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   44.374635] Rebooting in 86400 seconds..