[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   33.165734] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.223224] random: sshd: uninitialized urandom read (32 bytes read)
[   36.516734] random: sshd: uninitialized urandom read (32 bytes read)
[   37.968306] random: sshd: uninitialized urandom read (32 bytes read)
[   38.197734] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts.
[   43.698924] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   43.820685] WARNING: CPU: 1 PID: 4588 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   43.829250] Kernel panic - not syncing: panic_on_warn set ...
[   43.829250] 
[   43.836627] CPU: 1 PID: 4588 Comm: syz-executor709 Not tainted 4.18.0-rc5+ #29
[   43.843982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.853344] Call Trace:
[   43.855952]  dump_stack+0x185/0x1e0
[   43.859611]  panic+0x3d0/0x9b0
[   43.862817]  __warn+0x40f/0x580
[   43.866099]  ? smc_unhash_sk+0x37b/0x3f0
[   43.870170]  report_bug+0x72a/0x880
[   43.873808]  ? smc_unhash_sk+0x37b/0x3f0
[   43.877885]  ? smc_unhash_sk+0x37b/0x3f0
[   43.881994]  do_error_trap+0x1fe/0x710
[   43.885922]  ? sock_destroy_inode+0xab/0xd0
[   43.890281]  ? sock_alloc_inode+0x2b0/0x2b0
[   43.894640]  do_invalid_op+0x46/0x50
[   43.898370]  invalid_op+0x14/0x20
[   43.901821] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   43.906497] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 95 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 95 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 95 e0 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 95 d5 f7 4d 85 e4 
[   43.925842] RSP: 0018:ffff88018d3ff9f8 EFLAGS: 00010293
[   43.931224] RAX: ffffffff89ee446b RBX: ffff8801b90e0080 RCX: ffff88018c08bb00
[   43.938499] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a565400
[   43.945779] RBP: ffff88018d3ffa78 R08: 0000000000480020 R09: 0000000000000002
[   43.953095] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000
[   43.960377] R13: ffff8801b90e0000 R14: 0000000000000001 R15: 00000000fa200098
[   43.967680]  ? smc_hash_sk+0x3a0/0x3a0
[   43.971573]  ? smc_unhash_sk+0x37b/0x3f0
[   43.975662]  ? smc_unhash_sk+0x37b/0x3f0
[   43.979752]  ? smc_hash_sk+0x3a0/0x3a0
[   43.983640]  smc_release+0x81b/0x900
[   43.987373]  ? smc_sock_alloc+0x830/0x830
[   43.991540]  sock_close+0x11e/0x360
[   43.995187]  __fput+0x458/0xa30
[   43.998484]  ? fput+0x300/0x300
[   44.001780]  ____fput+0x37/0x40
[   44.005089]  task_work_run+0x22e/0x2b0
[   44.008989]  do_exit+0x110e/0x3930
[   44.012577]  do_group_exit+0x1a0/0x360
[   44.016500]  __do_sys_exit_group+0x21/0x30
[   44.020771]  __se_sys_exit_group+0x14/0x20
[   44.025064]  __x64_sys_exit_group+0x4c/0x50
[   44.029413]  ? do_group_exit+0x360/0x360
[   44.033486]  do_syscall_64+0x15b/0x230
[   44.037383]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   44.042578] RIP: 0033:0x43ecb8
[   44.045758] Code: Bad RIP value.
[   44.049139] RSP: 002b:00007ffe3b9f5e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   44.056850] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecb8
[   44.064114] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   44.071378] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0
[   44.078641] R10: 0000000020004010 R11: 0000000000000246 R12: 0000000000000001
[   44.085913] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   44.093766] Dumping ftrace buffer:
[   44.097300]    (ftrace buffer empty)
[   44.101000] Kernel Offset: disabled
[   44.104637] Rebooting in 86400 seconds..