[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[    5.592760] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.860294] random: sshd: uninitialized urandom read (32 bytes read)
[   17.038702] random: sshd: uninitialized urandom read (32 bytes read)
[   17.447407] random: sshd: uninitialized urandom read (32 bytes read)
[   44.431144] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts.
[   49.977023] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   50.048863] WARNING: CPU: 0 PID: 4025 at ./include/net/sock.h:644 smc_unhash_sk+0xa6/0xb0
[   50.057189] Kernel panic - not syncing: panic_on_warn set ...
[   50.057189] 
[   50.064527] CPU: 0 PID: 4025 Comm: syz-executor257 Not tainted 4.18.0-rc5+ #30
[   50.071873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.081196] Call Trace:
[   50.083754]  dump_stack+0xae/0xf0
[   50.087176]  panic+0x121/0x390
[   50.090348]  ? printk+0x5a/0x70
[   50.093595]  ? smc_unhash_sk+0xa6/0xb0
[   50.097450]  __warn+0x188/0x190
[   50.100698]  ? smc_unhash_sk+0xa6/0xb0
[   50.104554]  report_bug+0x1bf/0x200
[   50.108158]  do_error_trap+0x47/0x1b0
[   50.111927]  ? dst_release+0x34/0x90
[   50.115611]  ? fsnotify_destroy_marks+0x58/0x250
[   50.120336]  do_invalid_op+0x1b/0x20
[   50.124031]  invalid_op+0x14/0x20
[   50.127453] RIP: 0010:smc_unhash_sk+0xa6/0xb0
[   50.131913] Code: 0f 00 48 8b 73 28 48 8b 7b 30 ba ff ff ff ff e8 f0 46 9d ff 4c 89 f7 e8 e8 9d 0f 00 5b 41 5c 41 5e 41 5f 5d c3 e8 8a d3 88 fe <0f> 0b eb c1 66 0f 1f 44 00 00 55 48 89 e5 41 56 53 41 89 f6 48 89 
[   50.151533] RSP: 0018:ffff8802016a7d40 EFLAGS: 00010293
[   50.156864] RAX: ffffffff828dd8e6 RBX: ffff880201600000 RCX: ffff8801fe80d280
[   50.164103] RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff83b1c2f0
[   50.171343] RBP: ffff8802016a7d60 R08: ffffffff7fffffff R09: 0000000000000000
[   50.178677] R10: ffff8802014d99c0 R11: ffffffff828dd840 R12: 0000000000000000
[   50.185931] R13: ffff88020f613a10 R14: ffffffff83b1c2f0 R15: ffffffff83b1c2f8
[   50.193178]  ? smc_hash_sk+0x90/0x90
[   50.196871]  ? smc_unhash_sk+0xa6/0xb0
[   50.200726]  smc_release+0x1af/0x1f0
[   50.204418]  sock_close+0x48/0xd0
[   50.207838]  ? sock_mmap+0x40/0x40
[   50.211346]  __fput+0x110/0x280
[   50.214605]  ____fput+0x15/0x20
[   50.217852]  task_work_run+0xb4/0xe0
[   50.221532]  do_exit+0x3a7/0xd70
[   50.224884]  ? syscall_return_slowpath+0x3f/0x270
[   50.229693]  do_group_exit+0x68/0xf0
[   50.233400]  __do_sys_exit_group+0xf/0x10
[   50.237541]  __se_sys_exit_group+0x9/0x10
[   50.241659]  __x64_sys_exit_group+0xd/0x10
[   50.245862]  do_syscall_64+0x61/0x90
[   50.249546]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   50.254704] RIP: 0033:0x43eed8
[   50.257865] Code: Bad RIP value.
[   50.261222] RSP: 002b:00007ffefaf4daa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   50.268900] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eed8
[   50.276152] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   50.283407] RBP: 00000000004be788 R08: 00000000000000e7 R09: ffffffffffffffd0
[   50.290662] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   50.297903] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   50.305553] Dumping ftrace buffer:
[   50.309066]    (ftrace buffer empty)
[   50.312759] Kernel Offset: disabled
[   50.316365] Rebooting in 86400 seconds..