[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.887009] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.577205] random: sshd: uninitialized urandom read (32 bytes read)
[   36.854209] random: sshd: uninitialized urandom read (32 bytes read)
[   38.270427] random: sshd: uninitialized urandom read (32 bytes read)
[   42.874962] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts.
[   48.396791] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   48.519083] WARNING: CPU: 0 PID: 4546 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   48.527612] Kernel panic - not syncing: panic_on_warn set ...
[   48.527612] 
[   48.534982] CPU: 0 PID: 4546 Comm: syz-executor291 Not tainted 4.18.0-rc5+ #29
[   48.542335] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.551681] Call Trace:
[   48.554281]  dump_stack+0x185/0x1e0
[   48.557923]  panic+0x3d0/0x9b0
[   48.561121]  __warn+0x40f/0x580
[   48.564399]  ? smc_unhash_sk+0x37b/0x3f0
[   48.568460]  report_bug+0x72a/0x880
[   48.572087]  ? smc_unhash_sk+0x37b/0x3f0
[   48.576324]  ? smc_unhash_sk+0x37b/0x3f0
[   48.580401]  do_error_trap+0x1fe/0x710
[   48.584317]  ? sock_destroy_inode+0xab/0xd0
[   48.589001]  ? sock_alloc_inode+0x2b0/0x2b0
[   48.593343]  do_invalid_op+0x46/0x50
[   48.597074]  invalid_op+0x14/0x20
[   48.600525] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   48.605184] 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 
[   48.624510] RSP: 0018:ffff880192f1f9f8 EFLAGS: 00010293
[   48.629873] RAX: ffffffff89ee446b RBX: ffff8801b5654080 RCX: ffff88018f035880
[   48.637137] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a405f80
[   48.644402] RBP: ffff880192f1fa78 R08: 0000000000480020 R09: 0000000000000002
[   48.651677] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000
[   48.658948] R13: ffff8801b5654000 R14: 0000000000000001 R15: 0000000093600099
[   48.666236]  ? smc_hash_sk+0x3a0/0x3a0
[   48.670281]  ? smc_unhash_sk+0x37b/0x3f0
[   48.674363]  ? smc_unhash_sk+0x37b/0x3f0
[   48.678440]  ? smc_hash_sk+0x3a0/0x3a0
[   48.682337]  smc_release+0x81b/0x900
[   48.686101]  ? smc_sock_alloc+0x830/0x830
[   48.690281]  sock_close+0x11e/0x360
[   48.693924]  __fput+0x458/0xa30
[   48.697220]  ? fput+0x300/0x300
[   48.700532]  ____fput+0x37/0x40
[   48.703821]  task_work_run+0x22e/0x2b0
[   48.707708]  do_exit+0x110e/0x3930
[   48.711272]  do_group_exit+0x1a0/0x360
[   48.715178]  __do_sys_exit_group+0x21/0x30
[   48.719425]  __se_sys_exit_group+0x14/0x20
[   48.723714]  __x64_sys_exit_group+0x4c/0x50
[   48.728067]  ? do_group_exit+0x360/0x360
[   48.732136]  do_syscall_64+0x15b/0x230
[   48.736040]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   48.741228] RIP: 0033:0x43ec78
[   48.744404] Code: Bad RIP value.
[   48.747777] RSP: 002b:00007fff98647068 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.755500] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78
[   48.762770] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   48.770043] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0
[   48.777310] R10: 0000000020000980 R11: 0000000000000246 R12: 0000000000000001
[   48.784580] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   48.792359] Dumping ftrace buffer:
[   48.795896]    (ftrace buffer empty)
[   48.799593] Kernel Offset: disabled
[   48.803216] Rebooting in 86400 seconds..