[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   35.449324] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   40.429123] random: sshd: uninitialized urandom read (32 bytes read)
[   40.916700] random: sshd: uninitialized urandom read (32 bytes read)
[   42.423338] random: sshd: uninitialized urandom read (32 bytes read)
[   42.674784] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts.
[   48.430062] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   48.556687] WARNING: CPU: 1 PID: 4593 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   48.565265] Kernel panic - not syncing: panic_on_warn set ...
[   48.565265] 
[   48.573426] CPU: 1 PID: 4593 Comm: syz-executor965 Not tainted 4.18.0-rc5+ #29
[   48.580817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.590202] Call Trace:
[   48.592856]  dump_stack+0x185/0x1e0
[   48.596523]  panic+0x3d0/0x9b0
[   48.599749]  __warn+0x40f/0x580
[   48.603062]  ? smc_unhash_sk+0x37b/0x3f0
[   48.607166]  report_bug+0x72a/0x880
[   48.610808]  ? smc_unhash_sk+0x37b/0x3f0
[   48.614898]  ? smc_unhash_sk+0x37b/0x3f0
[   48.618991]  do_error_trap+0x1fe/0x710
[   48.622928]  ? sock_destroy_inode+0xab/0xd0
[   48.627294]  ? sock_alloc_inode+0x2b0/0x2b0
[   48.631662]  do_invalid_op+0x46/0x50
[   48.635422]  invalid_op+0x14/0x20
[   48.638900] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   48.643589] 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 
[   48.663028] RSP: 0018:ffff8801ab87f9f8 EFLAGS: 00010293
[   48.668480] RAX: ffffffff89ee446b RBX: ffff8801b295c080 RCX: ffff880191453b00
[   48.675768] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a2f8280
[   48.683106] RBP: ffff8801ab87fa78 R08: 0000000000480020 R09: 0000000000000002
[   48.690410] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000
[   48.697718] R13: ffff8801b295c000 R14: 0000000000000001 R15: 000000008b200099
[   48.705046]  ? smc_hash_sk+0x3a0/0x3a0
[   48.708996]  ? smc_unhash_sk+0x37b/0x3f0
[   48.713144]  ? smc_unhash_sk+0x37b/0x3f0
[   48.717316]  ? smc_hash_sk+0x3a0/0x3a0
[   48.721252]  smc_release+0x81b/0x900
[   48.725029]  ? smc_sock_alloc+0x830/0x830
[   48.729242]  sock_close+0x11e/0x360
[   48.732947]  __fput+0x458/0xa30
[   48.736286]  ? fput+0x300/0x300
[   48.739611]  ____fput+0x37/0x40
[   48.742957]  task_work_run+0x22e/0x2b0
[   48.746908]  do_exit+0x110e/0x3930
[   48.750529]  do_group_exit+0x1a0/0x360
[   48.754478]  __do_sys_exit_group+0x21/0x30
[   48.758772]  __se_sys_exit_group+0x14/0x20
[   48.763090]  __x64_sys_exit_group+0x4c/0x50
[   48.767455]  ? do_group_exit+0x360/0x360
[   48.771560]  do_syscall_64+0x15b/0x230
[   48.775475]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   48.780860] RIP: 0033:0x43ecc8
[   48.784059] Code: Bad RIP value.
[   48.787461] RSP: 002b:00007ffcc8e71b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.795198] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecc8
[   48.802492] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   48.809802] RBP: 00000000004be588 R08: 00000000000000e7 R09: ffffffffffffffd0
[   48.817092] R10: 0000000020000010 R11: 0000000000000246 R12: 0000000000000001
[   48.824398] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   48.832259] Dumping ftrace buffer:
[   48.835854]    (ftrace buffer empty)
[   48.839614] Kernel Offset: disabled
[   48.843294] Rebooting in 86400 seconds..