[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.802631] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.497302] random: sshd: uninitialized urandom read (32 bytes read)
[   36.902212] random: sshd: uninitialized urandom read (32 bytes read)
[   38.311777] random: sshd: uninitialized urandom read (32 bytes read)
[   38.538713] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts.
[   44.082622] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   44.197985] WARNING: CPU: 1 PID: 4546 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   44.206527] Kernel panic - not syncing: panic_on_warn set ...
[   44.206527] 
[   44.213902] CPU: 1 PID: 4546 Comm: syz-executor186 Not tainted 4.18.0-rc4+ #27
[   44.221257] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.230613] Call Trace:
[   44.233210]  dump_stack+0x185/0x1e0
[   44.236851]  panic+0x3d0/0x9b0
[   44.240068]  __warn+0x40f/0x580
[   44.243349]  ? smc_unhash_sk+0x37b/0x3f0
[   44.247407]  report_bug+0x72a/0x880
[   44.251074]  ? smc_unhash_sk+0x37b/0x3f0
[   44.255141]  ? smc_unhash_sk+0x37b/0x3f0
[   44.259215]  do_error_trap+0x1fe/0x710
[   44.263132]  ? sock_destroy_inode+0xab/0xd0
[   44.267468]  ? sock_alloc_inode+0x2b0/0x2b0
[   44.271807]  do_invalid_op+0x46/0x50
[   44.275533]  invalid_op+0x14/0x20
[   44.278986] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   44.283638] 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 
[   44.302964] RSP: 0018:ffff8801ab56f9f8 EFLAGS: 00010293
[   44.308325] RAX: ffffffff89ee346b RBX: ffff880191a38080 RCX: ffff8801d0f23b00
[   44.315585] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000969d500
[   44.322845] RBP: ffff8801ab56fa78 R08: 0000000000480020 R09: 0000000000000002
[   44.330107] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   44.337367] R13: ffff880191a38000 R14: 0000000000000001 R15: 00000000cb600099
[   44.344654]  ? smc_hash_sk+0x3a0/0x3a0
[   44.348538]  ? smc_unhash_sk+0x37b/0x3f0
[   44.352625]  ? smc_unhash_sk+0x37b/0x3f0
[   44.356701]  ? smc_hash_sk+0x3a0/0x3a0
[   44.360586]  smc_release+0x81b/0x900
[   44.364314]  ? smc_sock_alloc+0x830/0x830
[   44.368476]  sock_close+0x11e/0x360
[   44.372117]  __fput+0x458/0xa30
[   44.375409]  ? fput+0x300/0x300
[   44.378690]  ____fput+0x37/0x40
[   44.381976]  task_work_run+0x22e/0x2b0
[   44.385867]  do_exit+0x110e/0x3930
[   44.389430]  do_group_exit+0x1a0/0x360
[   44.393338]  __do_sys_exit_group+0x21/0x30
[   44.397586]  __se_sys_exit_group+0x14/0x20
[   44.401834]  __x64_sys_exit_group+0x4c/0x50
[   44.406168]  ? do_group_exit+0x360/0x360
[   44.410236]  do_syscall_64+0x15b/0x230
[   44.414136]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   44.419318] RIP: 0033:0x43ec98
[   44.422503] Code: Bad RIP value.
[   44.425874] RSP: 002b:00007ffd43831cd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   44.433584] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec98
[   44.440843] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   44.448103] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0
[   44.455374] R10: 0000000020000180 R11: 0000000000000246 R12: 0000000000000001
[   44.462634] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   44.470387] Dumping ftrace buffer:
[   44.473911]    (ftrace buffer empty)
[   44.477606] Kernel Offset: disabled
[   44.481228] Rebooting in 86400 seconds..