[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.205953] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.560542] random: sshd: uninitialized urandom read (32 bytes read)
[   38.029808] random: sshd: uninitialized urandom read (32 bytes read)
[   39.541898] random: sshd: uninitialized urandom read (32 bytes read)
[   43.075532] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts.
[   48.631727] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   48.755156] WARNING: CPU: 0 PID: 4591 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   48.763682] Kernel panic - not syncing: panic_on_warn set ...
[   48.763682] 
[   48.771070] CPU: 0 PID: 4591 Comm: syz-executor946 Not tainted 4.18.0-rc4+ #27
[   48.778437] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.787797] Call Trace:
[   48.790408]  dump_stack+0x185/0x1e0
[   48.794085]  panic+0x3d0/0x9b0
[   48.797308]  __warn+0x40f/0x580
[   48.800588]  ? smc_unhash_sk+0x37b/0x3f0
[   48.804650]  report_bug+0x72a/0x880
[   48.808275]  ? smc_unhash_sk+0x37b/0x3f0
[   48.812342]  ? smc_unhash_sk+0x37b/0x3f0
[   48.816423]  do_error_trap+0x1fe/0x710
[   48.820338]  ? sock_destroy_inode+0xab/0xd0
[   48.824693]  ? sock_alloc_inode+0x2b0/0x2b0
[   48.829047]  do_invalid_op+0x46/0x50
[   48.832772]  invalid_op+0x14/0x20
[   48.836223] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   48.840878] 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 
[   48.860253] RSP: 0018:ffff8801b441f9f8 EFLAGS: 00010293
[   48.865639] RAX: ffffffff89ee346b RBX: ffff8801a1260080 RCX: ffff88018f855880
[   48.872915] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009c6e400
[   48.880184] RBP: ffff8801b441fa78 R08: 0000000000480020 R09: 0000000000000002
[   48.887449] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   48.894718] R13: ffff8801a1260000 R14: 0000000000000001 R15: 00000000fee00098
[   48.902012]  ? smc_hash_sk+0x3a0/0x3a0
[   48.905915]  ? smc_unhash_sk+0x37b/0x3f0
[   48.909997]  ? smc_unhash_sk+0x37b/0x3f0
[   48.914174]  ? smc_hash_sk+0x3a0/0x3a0
[   48.918073]  smc_release+0x81b/0x900
[   48.921821]  ? smc_sock_alloc+0x830/0x830
[   48.925986]  sock_close+0x11e/0x360
[   48.929631]  __fput+0x458/0xa30
[   48.932932]  ? fput+0x300/0x300
[   48.936216]  ____fput+0x37/0x40
[   48.939508]  task_work_run+0x22e/0x2b0
[   48.943399]  do_exit+0x110e/0x3930
[   48.946978]  do_group_exit+0x1a0/0x360
[   48.950887]  __do_sys_exit_group+0x21/0x30
[   48.955141]  __se_sys_exit_group+0x14/0x20
[   48.959392]  __x64_sys_exit_group+0x4c/0x50
[   48.963729]  ? do_group_exit+0x360/0x360
[   48.967800]  do_syscall_64+0x15b/0x230
[   48.971690]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   48.976875] RIP: 0033:0x43ec88
[   48.980054] Code: Bad RIP value.
[   48.983431] RSP: 002b:00007fffee564f68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.991139] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88
[   48.998416] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   49.005696] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0
[   49.012959] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001
[   49.020220] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   49.027989] Dumping ftrace buffer:
[   49.031523]    (ftrace buffer empty)
[   49.035220] Kernel Offset: disabled
[   49.038857] Rebooting in 86400 seconds..