[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   35.041870] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.640503] random: sshd: uninitialized urandom read (32 bytes read)
[   38.036636] random: sshd: uninitialized urandom read (32 bytes read)
[   39.490344] random: sshd: uninitialized urandom read (32 bytes read)
[   39.732227] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts.
[   45.272587] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   45.409700] WARNING: CPU: 1 PID: 4587 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   45.418244] Kernel panic - not syncing: panic_on_warn set ...
[   45.418244] 
[   45.425616] CPU: 1 PID: 4587 Comm: syz-executor991 Not tainted 4.18.0-rc5+ #29
[   45.432967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.442315] Call Trace:
[   45.444914]  dump_stack+0x185/0x1e0
[   45.448544]  panic+0x3d0/0x9b0
[   45.451758]  __warn+0x40f/0x580
[   45.455047]  ? smc_unhash_sk+0x37b/0x3f0
[   45.459109]  report_bug+0x72a/0x880
[   45.462733]  ? smc_unhash_sk+0x37b/0x3f0
[   45.466791]  ? smc_unhash_sk+0x37b/0x3f0
[   45.470871]  do_error_trap+0x1fe/0x710
[   45.474780]  ? sock_destroy_inode+0xab/0xd0
[   45.479128]  ? sock_alloc_inode+0x2b0/0x2b0
[   45.483507]  do_invalid_op+0x46/0x50
[   45.487619]  invalid_op+0x14/0x20
[   45.491080] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   45.495738] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 95 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 95 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 95 e0 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 95 d5 f7 4d 85 e4 
[   45.515090] RSP: 0018:ffff88019ddaf9f8 EFLAGS: 00010293
[   45.520497] RAX: ffffffff89ee446b RBX: ffff8801bd49c080 RCX: ffff8801c4a5d880
[   45.527803] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a6fba80
[   45.535087] RBP: ffff88019ddafa78 R08: 0000000000480020 R09: 0000000000000002
[   45.542374] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000
[   45.549658] R13: ffff8801bd49c000 R14: 0000000000000001 R15: 00000000fee00098
[   45.556945]  ? smc_hash_sk+0x3a0/0x3a0
[   45.560847]  ? smc_unhash_sk+0x37b/0x3f0
[   45.564933]  ? smc_unhash_sk+0x37b/0x3f0
[   45.569022]  ? smc_hash_sk+0x3a0/0x3a0
[   45.572924]  smc_release+0x81b/0x900
[   45.576664]  ? smc_sock_alloc+0x830/0x830
[   45.581003]  sock_close+0x11e/0x360
[   45.584643]  __fput+0x458/0xa30
[   45.587934]  ? fput+0x300/0x300
[   45.591219]  ____fput+0x37/0x40
[   45.594495]  task_work_run+0x22e/0x2b0
[   45.598406]  do_exit+0x110e/0x3930
[   45.601973]  do_group_exit+0x1a0/0x360
[   45.605883]  __do_sys_exit_group+0x21/0x30
[   45.610141]  __se_sys_exit_group+0x14/0x20
[   45.614387]  __x64_sys_exit_group+0x4c/0x50
[   45.618738]  ? do_group_exit+0x360/0x360
[   45.622813]  do_syscall_64+0x15b/0x230
[   45.626717]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   45.631899] RIP: 0033:0x43ed38
[   45.635075] Code: Bad RIP value.
[   45.638450] RSP: 002b:00007ffc7bef5f98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   45.646164] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed38
[   45.653451] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   45.660718] RBP: 00000000004be5e8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   45.667980] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   45.675254] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   45.683028] Dumping ftrace buffer:
[   45.686557]    (ftrace buffer empty)
[   45.690252] Kernel Offset: disabled
[   45.693878] Rebooting in 86400 seconds..