[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.493572] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.148274] random: sshd: uninitialized urandom read (32 bytes read)
[   37.533579] random: sshd: uninitialized urandom read (32 bytes read)
[   38.807491] random: sshd: uninitialized urandom read (32 bytes read)
[   39.026114] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts.
[   44.575246] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   44.685505] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[   44.693522] PGD 80000001982d8067 P4D 80000001982d8067 PUD 198684067 PMD 0 
[   44.700551] Oops: 0000 [#1] SMP PTI
[   44.704172] Dumping ftrace buffer:
[   44.707708]    (ftrace buffer empty)
[   44.711406] Modules linked in:
[   44.714602] CPU: 1 PID: 4574 Comm: syz-executor302 Not tainted 4.17.0-rc3+ #88
[   44.721949] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.731311] RIP: 0010:smc_getsockopt+0xc6/0x1a0
[   44.735968] RSP: 0018:ffff8801988efd48 EFLAGS: 00010246
[   44.741324] RAX: ffff8801994782d0 RBX: ffff88019a8988d8 RCX: ffff880000000000
[   44.748584] RDX: ffff8801986e42d0 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
[   44.755843] RBP: ffff8801988efdb8 R08: 00000000200002c0 R09: 0000000000000002
[   44.763103] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   44.770361] R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000000
[   44.777623] FS:  00007f78b7d91700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   44.785838] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.791708] CR2: 0000000000000028 CR3: 0000000198d4a000 CR4: 00000000001406e0
[   44.798972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.806232] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.813487] Call Trace:
[   44.816102]  ? smc_setsockopt+0x1a0/0x1a0
[   44.820262]  __sys_getsockopt+0x49b/0x560
[   44.824458]  __x64_sys_getsockopt+0x15d/0x1c0
[   44.828963]  do_syscall_64+0x154/0x220
[   44.832853]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   44.838032] RIP: 0033:0x4454f9
[   44.841210] RSP: 002b:00007f78b7d90db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   44.848912] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004454f9
[   44.856169] RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000003
[   44.863429] RBP: 00000000006dac20 R08: 00000000200002c0 R09: 0000000000000000
[   44.870688] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000
[   44.877958] R13: 00007ffeb80aeadf R14: 00007f78b7d919c0 R15: 0000000000000001
[   44.885219] Code: 0f 85 d0 00 00 00 4d 8b 37 4c 89 ff e8 54 bc 0f f8 4c 8b 38 44 8b 22 4c 89 75 b0 4d 8d 6e 28 4d 85 ff 0f 85 ba 00 00 00 45 89 e6 <4d> 8b 65 00 4c 89 ef e8 2e bc 0f f8 49 83 c4 70 48 83 38 00 0f 
[   44.904570] RIP: smc_getsockopt+0xc6/0x1a0 RSP: ffff8801988efd48
[   44.910700] CR2: 0000000000000028
[   44.914290] ---[ end trace fed8d275c1fcf6ec ]---
[   44.919108] Kernel panic - not syncing: Fatal exception
[   44.924912] Dumping ftrace buffer:
[   44.928451]    (ftrace buffer empty)
[   44.932143] Kernel Offset: disabled
[   44.935760] Rebooting in 86400 seconds..