[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.910520] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   38.137880] random: sshd: uninitialized urandom read (32 bytes read)
[   38.500414] random: sshd: uninitialized urandom read (32 bytes read)
[   39.882755] random: sshd: uninitialized urandom read (32 bytes read)
[   40.116680] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts.
[   45.711844] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   45.834373] WARNING: CPU: 1 PID: 4634 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   45.842938] Kernel panic - not syncing: panic_on_warn set ...
[   45.842938] 
[   45.850336] CPU: 1 PID: 4634 Comm: syz-executor931 Not tainted 4.18.0-rc4+ #27
[   45.857702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.867060] Call Trace:
[   45.869674]  dump_stack+0x185/0x1e0
[   45.873337]  panic+0x3d0/0x9b0
[   45.876544]  __warn+0x40f/0x580
[   45.879833]  ? smc_unhash_sk+0x37b/0x3f0
[   45.883903]  report_bug+0x72a/0x880
[   45.887547]  ? smc_unhash_sk+0x37b/0x3f0
[   45.891611]  ? smc_unhash_sk+0x37b/0x3f0
[   45.895711]  do_error_trap+0x1fe/0x710
[   45.899656]  ? sock_destroy_inode+0xab/0xd0
[   45.904007]  ? sock_alloc_inode+0x2b0/0x2b0
[   45.908369]  do_invalid_op+0x46/0x50
[   45.912100]  invalid_op+0x14/0x20
[   45.915566] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   45.920222] 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 
[   45.939568] RSP: 0018:ffff88019659f9f8 EFLAGS: 00010293
[   45.944941] RAX: ffffffff89ee346b RBX: ffff8801a5c0c080 RCX: ffff8801cbe20000
[   45.952500] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009e28480
[   45.959770] RBP: ffff88019659fa78 R08: 0000000000480020 R09: 0000000000000002
[   45.967041] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   45.974318] R13: ffff8801a5c0c000 R14: 0000000000000001 R15: 000000008ec0009a
[   45.981603]  ? smc_hash_sk+0x3a0/0x3a0
[   45.985490]  ? smc_unhash_sk+0x37b/0x3f0
[   45.989579]  ? smc_unhash_sk+0x37b/0x3f0
[   45.993661]  ? smc_hash_sk+0x3a0/0x3a0
[   45.997546]  smc_release+0x81b/0x900
[   46.001283]  ? smc_sock_alloc+0x830/0x830
[   46.005473]  sock_close+0x11e/0x360
[   46.009149]  __fput+0x458/0xa30
[   46.012461]  ? fput+0x300/0x300
[   46.015853]  ____fput+0x37/0x40
[   46.019147]  task_work_run+0x22e/0x2b0
[   46.023041]  do_exit+0x110e/0x3930
[   46.026613]  do_group_exit+0x1a0/0x360
[   46.030519]  __do_sys_exit_group+0x21/0x30
[   46.034765]  __se_sys_exit_group+0x14/0x20
[   46.039016]  __x64_sys_exit_group+0x4c/0x50
[   46.043373]  ? do_group_exit+0x360/0x360
[   46.047442]  do_syscall_64+0x15b/0x230
[   46.051343]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   46.056527] RIP: 0033:0x43ec88
[   46.059701] Code: Bad RIP value.
[   46.063075] RSP: 002b:00007ffcdea2ff48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   46.070785] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88
[   46.078143] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   46.085417] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0
[   46.092684] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001
[   46.099955] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   46.107842] Dumping ftrace buffer:
[   46.111382]    (ftrace buffer empty)
[   46.115089] Kernel Offset: disabled
[   46.118715] Rebooting in 86400 seconds..