[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   35.256588] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   39.744233] random: sshd: uninitialized urandom read (32 bytes read)
[   40.195889] random: sshd: uninitialized urandom read (32 bytes read)
[   41.644790] random: sshd: uninitialized urandom read (32 bytes read)
[   41.882194] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts.
[   47.430891] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   47.556784] WARNING: CPU: 0 PID: 4590 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   47.565333] Kernel panic - not syncing: panic_on_warn set ...
[   47.565333] 
[   47.572744] CPU: 0 PID: 4590 Comm: syz-executor450 Not tainted 4.18.0-rc4+ #27
[   47.580129] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.589510] Call Trace:
[   47.592170]  dump_stack+0x185/0x1e0
[   47.595849]  panic+0x3d0/0x9b0
[   47.599089]  __warn+0x40f/0x580
[   47.602397]  ? smc_unhash_sk+0x37b/0x3f0
[   47.606495]  report_bug+0x72a/0x880
[   47.610148]  ? smc_unhash_sk+0x37b/0x3f0
[   47.614228]  ? smc_unhash_sk+0x37b/0x3f0
[   47.618341]  do_error_trap+0x1fe/0x710
[   47.622283]  ? sock_destroy_inode+0xab/0xd0
[   47.626654]  ? sock_alloc_inode+0x2b0/0x2b0
[   47.631017]  do_invalid_op+0x46/0x50
[   47.634771]  invalid_op+0x14/0x20
[   47.638262] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   47.642935] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 60 a5 d5 f7 e9 f7 fe ff ff 8b 3a e8 54 a5 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 a5 f6 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 32 a5 d5 f7 4d 85 e4 
[   47.662319] RSP: 0018:ffff8801b9b6f9f8 EFLAGS: 00010293
[   47.667721] RAX: ffffffff89ee346b RBX: ffff8801afc98080 RCX: ffff88018f079d80
[   47.675019] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a1eb900
[   47.682324] RBP: ffff8801b9b6fa78 R08: 0000000000480020 R09: 0000000000000002
[   47.689622] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   47.696928] R13: ffff8801afc98000 R14: 0000000000000001 R15: 00000000f5200099
[   47.704259]  ? smc_hash_sk+0x3a0/0x3a0
[   47.708174]  ? smc_unhash_sk+0x37b/0x3f0
[   47.712297]  ? smc_unhash_sk+0x37b/0x3f0
[   47.716429]  ? smc_hash_sk+0x3a0/0x3a0
[   47.721473]  smc_release+0x81b/0x900
[   47.725226]  ? smc_sock_alloc+0x830/0x830
[   47.729837]  sock_close+0x11e/0x360
[   47.733504]  __fput+0x458/0xa30
[   47.736823]  ? fput+0x300/0x300
[   47.740218]  ____fput+0x37/0x40
[   47.743533]  task_work_run+0x22e/0x2b0
[   47.747491]  do_exit+0x110e/0x3930
[   47.751109]  do_group_exit+0x1a0/0x360
[   47.755087]  __do_sys_exit_group+0x21/0x30
[   47.759358]  __se_sys_exit_group+0x14/0x20
[   47.763640]  __x64_sys_exit_group+0x4c/0x50
[   47.768000]  ? do_group_exit+0x360/0x360
[   47.772130]  do_syscall_64+0x15b/0x230
[   47.776063]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   47.781291] RIP: 0033:0x43ecf8
[   47.784483] Code: Bad RIP value.
[   47.787876] RSP: 002b:00007fff7fd7c5b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   47.795615] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecf8
[   47.802900] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   47.810184] RBP: 00000000004be5a8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   47.817475] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   47.824783] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   47.832667] Dumping ftrace buffer:
[   47.836239]    (ftrace buffer empty)
[   47.839956] Kernel Offset: disabled
[   47.843599] Rebooting in 86400 seconds..