[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   33.288010] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.970913] random: sshd: uninitialized urandom read (32 bytes read)
[   38.260153] random: sshd: uninitialized urandom read (32 bytes read)
[   39.648635] random: sshd: uninitialized urandom read (32 bytes read)
[   39.881941] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts.
[   45.518945] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   45.642399] WARNING: CPU: 0 PID: 4592 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   45.650962] Kernel panic - not syncing: panic_on_warn set ...
[   45.650962] 
[   45.658352] CPU: 0 PID: 4592 Comm: syz-executor613 Not tainted 4.18.0-rc4+ #27
[   45.665708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.675075] Call Trace:
[   45.677693]  dump_stack+0x185/0x1e0
[   45.681353]  panic+0x3d0/0x9b0
[   45.684557]  __warn+0x40f/0x580
[   45.688097]  ? smc_unhash_sk+0x37b/0x3f0
[   45.692170]  report_bug+0x72a/0x880
[   45.695802]  ? smc_unhash_sk+0x37b/0x3f0
[   45.699867]  ? smc_unhash_sk+0x37b/0x3f0
[   45.703956]  do_error_trap+0x1fe/0x710
[   45.707878]  ? sock_destroy_inode+0xab/0xd0
[   45.712221]  ? sock_alloc_inode+0x2b0/0x2b0
[   45.716576]  do_invalid_op+0x46/0x50
[   45.720310]  invalid_op+0x14/0x20
[   45.723769] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   45.728443] 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 
[   45.747789] RSP: 0018:ffff88019caaf9f8 EFLAGS: 00010293
[   45.753167] RAX: ffffffff89ee346b RBX: ffff8801a947c080 RCX: ffff880190a08000
[   45.760441] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009f7ae80
[   45.767712] RBP: ffff88019caafa78 R08: 0000000000480020 R09: 0000000000000002
[   45.775712] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   45.782997] R13: ffff8801a947c000 R14: 0000000000000001 R15: 000000008f400099
[   45.790308]  ? smc_hash_sk+0x3a0/0x3a0
[   45.794205]  ? smc_unhash_sk+0x37b/0x3f0
[   45.798290]  ? smc_unhash_sk+0x37b/0x3f0
[   45.802385]  ? smc_hash_sk+0x3a0/0x3a0
[   45.806271]  smc_release+0x81b/0x900
[   45.810012]  ? smc_sock_alloc+0x830/0x830
[   45.814216]  sock_close+0x11e/0x360
[   45.817869]  __fput+0x458/0xa30
[   45.821184]  ? fput+0x300/0x300
[   45.824491]  ____fput+0x37/0x40
[   45.827786]  task_work_run+0x22e/0x2b0
[   45.831677]  do_exit+0x110e/0x3930
[   45.835366]  do_group_exit+0x1a0/0x360
[   45.839281]  __do_sys_exit_group+0x21/0x30
[   45.843535]  __se_sys_exit_group+0x14/0x20
[   45.847796]  __x64_sys_exit_group+0x4c/0x50
[   45.852140]  ? do_group_exit+0x360/0x360
[   45.856214]  do_syscall_64+0x15b/0x230
[   45.860113]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   45.865302] RIP: 0033:0x43ec88
[   45.868481] Code: Bad RIP value.
[   45.871860] RSP: 002b:00007ffcd7248428 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   45.879592] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88
[   45.886858] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   45.894130] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0
[   45.901407] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001
[   45.908745] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   45.916571] Dumping ftrace buffer:
[   45.920114]    (ftrace buffer empty)
[   45.923830] Kernel Offset: disabled
[   45.927459] Rebooting in 86400 seconds..