[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.868348] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   38.841567] random: sshd: uninitialized urandom read (32 bytes read)
[   39.340349] random: sshd: uninitialized urandom read (32 bytes read)
[   40.777308] random: sshd: uninitialized urandom read (32 bytes read)
[   41.007111] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts.
[   46.638403] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   46.759276] WARNING: CPU: 0 PID: 4583 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   46.767813] Kernel panic - not syncing: panic_on_warn set ...
[   46.767813] 
[   46.775195] CPU: 0 PID: 4583 Comm: syz-executor660 Not tainted 4.18.0-rc4+ #27
[   46.782551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.791921] Call Trace:
[   46.794528]  dump_stack+0x185/0x1e0
[   46.798188]  panic+0x3d0/0x9b0
[   46.801412]  __warn+0x40f/0x580
[   46.804693]  ? smc_unhash_sk+0x37b/0x3f0
[   46.808757]  report_bug+0x72a/0x880
[   46.812395]  ? smc_unhash_sk+0x37b/0x3f0
[   46.816464]  ? smc_unhash_sk+0x37b/0x3f0
[   46.820545]  do_error_trap+0x1fe/0x710
[   46.824508]  ? sock_destroy_inode+0xab/0xd0
[   46.828860]  ? sock_alloc_inode+0x2b0/0x2b0
[   46.833205]  do_invalid_op+0x46/0x50
[   46.836932]  invalid_op+0x14/0x20
[   46.840387] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   46.845050] 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 
[   46.864395] RSP: 0018:ffff8801c0fff9f8 EFLAGS: 00010293
[   46.869768] RAX: ffffffff89ee346b RBX: ffff8801953d4080 RCX: ffff8801c4f21d80
[   46.877042] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00097f6f80
[   46.884316] RBP: ffff8801c0fffa78 R08: 0000000000480020 R09: 0000000000000002
[   46.891579] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   46.898842] R13: ffff8801953d4000 R14: 0000000000000001 R15: 00000000a5000099
[   46.906338]  ? smc_hash_sk+0x3a0/0x3a0
[   46.910228]  ? smc_unhash_sk+0x37b/0x3f0
[   46.914316]  ? smc_unhash_sk+0x37b/0x3f0
[   46.918402]  ? smc_hash_sk+0x3a0/0x3a0
[   46.922291]  smc_release+0x81b/0x900
[   46.926050]  ? smc_sock_alloc+0x830/0x830
[   46.930244]  sock_close+0x11e/0x360
[   46.933883]  __fput+0x458/0xa30
[   46.937188]  ? fput+0x300/0x300
[   46.940478]  ____fput+0x37/0x40
[   46.943755]  task_work_run+0x22e/0x2b0
[   46.947671]  do_exit+0x110e/0x3930
[   46.951238]  do_group_exit+0x1a0/0x360
[   46.955163]  __do_sys_exit_group+0x21/0x30
[   46.959414]  __se_sys_exit_group+0x14/0x20
[   46.963675]  __x64_sys_exit_group+0x4c/0x50
[   46.968036]  ? do_group_exit+0x360/0x360
[   46.972117]  do_syscall_64+0x15b/0x230
[   46.976024]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   46.981219] RIP: 0033:0x43ef38
[   46.984399] Code: Bad RIP value.
[   46.987952] RSP: 002b:00007ffc5a56a6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   46.995670] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ef38
[   47.002932] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   47.010206] RBP: 00000000004be7e8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   47.017478] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   47.024759] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   47.032567] Dumping ftrace buffer:
[   47.036105]    (ftrace buffer empty)
[   47.039809] Kernel Offset: disabled
[   47.043443] Rebooting in 86400 seconds..