[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[   11.886658] random: sshd: uninitialized urandom read (32 bytes read)
[   12.074443] audit: type=1400 audit(1568003929.306:6): avc:  denied  { map } for  pid=1759 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
[   12.112778] random: sshd: uninitialized urandom read (32 bytes read)
[   12.638686] random: sshd: uninitialized urandom read (32 bytes read)

[   12.807054] random: sshd: uninitialized urandom read (32 bytes read)
Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts.
syzkaller login: [   18.275874] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   18.386838] audit: type=1400 audit(1568003935.616:7): avc:  denied  { map } for  pid=1771 comm="syz-executor680" path="/root/syz-executor680555998" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   18.395389] kasan: CONFIG_KASAN_INLINE enabled
[   18.418188] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   18.426619] general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   18.433777] Modules linked in:
[   18.437236] CPU: 0 PID: 1771 Comm: syz-executor680 Not tainted 4.14.142+ #0
[   18.444318] task:         (ptrval) task.stack:         (ptrval)
[   18.450715] RIP: 0010:__blockdev_direct_IO+0x1dcf/0xe24e
[   18.456228] RSP: 0018:ffff8881d0e6f330 EFLAGS: 00010202
[   18.461579] RAX: dffffc0000000000 RBX: ffffea000743441c RCX: ffffffff9fa37f43
[   18.468841] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000020
[   18.476108] RBP: ffff8881d0e6f668 R08: 0000000000000000 R09: fffff94000e86884
[   18.483358] R10: fffff94000e86883 R11: ffffea000743441f R12: ffffea0007434400
[   18.490608] R13: ffffea0007434400 R14: 0000000000000000 R15: ffff8881d0e44000
[   18.497878] FS:  0000000001531880(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
[   18.506385] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.512384] CR2: 0000000020011000 CR3: 00000001d6f66001 CR4: 00000000001606b0
[   18.519837] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.527108] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.534774] Call Trace:
[   18.537449]  ? sb_init_dio_done_wq+0x90/0x90
[   18.541844]  ? __bfs+0x25/0x540
[   18.545228]  ? ext4_dio_get_block_unwritten_sync+0xd0/0xd0
[   18.550922]  ? lock_downgrade+0x5d0/0x5d0
[   18.555056]  ext4_direct_IO+0xa4f/0x2820
[   18.559275]  ? ext4_dio_get_block_unwritten_sync+0xd0/0xd0
[   18.565140]  ? ext4_da_write_begin+0x10c0/0x10c0
[   18.569909]  ? current_time+0x16/0xb0
[   18.573713]  ? mark_held_locks+0xa6/0xf0
[   18.577883]  ? timespec_trunc+0xc9/0x140
[   18.581962]  ? put_itimerspec64+0x1c0/0x1c0
[   18.586272]  ? trace_hardirqs_on_caller+0x37b/0x540
[   18.591281]  ? current_kernel_time64+0xb6/0x100
[   18.595962]  ? current_time+0x89/0xb0
[   18.599845]  ? filemap_check_errors+0x8b/0xb0
[   18.604528]  generic_file_direct_write+0x1e4/0x430
[   18.609533]  __generic_file_write_iter+0x209/0x550
[   18.614460]  ? generic_write_checks+0x252/0x410
[   18.619286]  ext4_file_write_iter+0x58f/0xdb0
[   18.623894]  ? ext4_llseek+0x7f0/0x7f0
[   18.627889]  do_iter_readv_writev+0x379/0x580
[   18.632384]  ? clone_verify_area+0x1e0/0x1e0
[   18.636778]  ? avc_policy_seqno+0x5/0x10
[   18.640861]  ? security_file_permission+0x88/0x1e0
[   18.645810]  do_iter_write+0x152/0x550
[   18.649680]  vfs_iter_write+0x70/0xa0
[   18.653464]  iter_file_splice_write+0x560/0xa50
[   18.658131]  ? vmsplice_to_user+0x1e0/0x1e0
[   18.662442]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   18.668021]  ? rcu_read_lock_sched_held+0x10a/0x130
[   18.673387]  ? vmsplice_to_user+0x1e0/0x1e0
[   18.679624]  SyS_splice+0xcd6/0x1270
[   18.683331]  ? filp_open+0x60/0x60
[   18.686856]  ? SyS_recv+0x40/0x40
[   18.690296]  ? compat_SyS_vmsplice+0x150/0x150
[   18.697039]  ? do_syscall_64+0x43/0x520
[   18.701729]  ? compat_SyS_vmsplice+0x150/0x150
[   18.706597]  do_syscall_64+0x19b/0x520
[   18.710493]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   18.716310] RIP: 0033:0x440309
[   18.719572] RSP: 002b:00007ffea8472008 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
[   18.727366] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309
[   18.734723] RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004
[   18.742334] RBP: 00000000006ca018 R08: 00000000ffffffff R09: 0000000000000000
[   18.749705] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90
[   18.757077] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000
[   18.764569] Code: 2c a1 e8 15 6d e9 ff 0f 0b e8 ae c0 cd ff 48 8b 84 24 e8 00 00 00 48 8d 78 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 37 a0 00 00 48 8b 84 24 e8 00 00 00 4c 8b 60 
[   18.785575] RIP: __blockdev_direct_IO+0x1dcf/0xe24e RSP: ffff8881d0e6f330
[   18.793435] ---[ end trace 323ac41b7966334d ]---
[   18.798207] Kernel panic - not syncing: Fatal exception
[   18.804315] Kernel Offset: 0x1e400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   18.815488] Rebooting in 86400 seconds..