[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.215278] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.
[   20.392819] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.693155] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)
[   21.641662] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available)
[   21.793150] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available)
Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts.
[   27.258056] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available)
2018/04/08 19:13:18 parsed 1 programs
2018/04/08 19:13:18 executed programs: 0
[   27.668946] IPVS: Creating netns size=2552 id=1
[   28.815453] kasan: CONFIG_KASAN_INLINE enabled
[   28.819898] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.832712] Dumping ftrace buffer:
[   28.836228]    (ftrace buffer empty)
[   28.839912] Modules linked in:
[   28.843193] CPU: 1 PID: 4043 Comm: syz-executor0 Not tainted 4.4.125-g38f41ec #21
[   28.850778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.860100] task: ffff8801c7358000 task.stack: ffff8801c7390000
[   28.866123] RIP: 0010:[<ffffffff831b0261>]  [<ffffffff831b0261>] udp_queue_rcv_skb+0x191/0x1560
[   28.875051] RSP: 0018:ffff8801c73978b0  EFLAGS: 00010206
[   28.880466] RAX: dffffc0000000000 RBX: ffff8800bb0b8000 RCX: ffffffff831b0248
[   28.887705] RDX: 000000000000000c RSI: ffff8801d0eddc80 RDI: 0000000000000060
[   28.894944] RBP: ffff8801c73978f0 R08: 0000000000000001 R09: 0000000000000001
[   28.902182] R10: 0000000000000000 R11: 1ffff10038e72ee8 R12: ffff8801d0eddc80
[   28.909428] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801d0eddcd8
[   28.916667] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000a0c9900
[   28.924862] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   28.930717] CR2: 0000000020df9ff0 CR3: 00000001d0d64000 CR4: 0000000000160670
[   28.937957] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.945194] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.952433] Stack:
[   28.954550]  ffff8800bb0b8088 ffff880000000001 ffff8800bb0b8088 dffffc0000000000
[   28.962524]  ffff8800bb0b8000 0000000000000000 ffffed0017617086 ffff8801d0eddc80
[   28.970492]  ffff8801c7397960 ffffffff82dfe8d6 ffff8800bb0b8188 ffff8800bb0b8190
[   28.978457] Call Trace:
[   28.981017]  [<ffffffff82dfe8d6>] release_sock+0x176/0x510
[   28.986620]  [<ffffffff831a9874>] udp_sendmsg+0x15c4/0x1c30
[   28.992303]  [<ffffffff831a60b0>] ? udp_push_pending_frames+0xe0/0xe0
[   28.998851]  [<ffffffff831a82b0>] ? udp_seq_next+0x80/0x80
[   29.004445]  [<ffffffff81b6adc1>] ? sock_has_perm+0x1c1/0x400
[   29.010302]  [<ffffffff81b6ae9f>] ? sock_has_perm+0x29f/0x400
[   29.016159]  [<ffffffff81b6ac9f>] ? sock_has_perm+0x9f/0x400
[   29.021927]  [<ffffffff831ddd71>] ? inet_sendmsg+0x201/0x4c0
[   29.027693]  [<ffffffff831dde2c>] inet_sendmsg+0x2bc/0x4c0
[   29.033285]  [<ffffffff831ddbe3>] ? inet_sendmsg+0x73/0x4c0
[   29.038966]  [<ffffffff831ddb70>] ? inet_recvmsg+0x4c0/0x4c0
[   29.044739]  [<ffffffff82df168a>] sock_sendmsg+0xca/0x110
[   29.050944]  [<ffffffff82df25d8>] SYSC_sendto+0x2c8/0x340
[   29.056451]  [<ffffffff82df2310>] ? SYSC_connect+0x310/0x310
[   29.062219]  [<ffffffff8150eab9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   29.069203]  [<ffffffff83778e2c>] ? _raw_spin_unlock+0x2c/0x50
[   29.075145]  [<ffffffff812e31b9>] ? compat_SyS_futex+0x1f9/0x2a0
[   29.081258]  [<ffffffff812e2fc0>] ? compat_SyS_get_robust_list+0x300/0x300
[   29.088239]  [<ffffffff82df4ad0>] SyS_sendto+0x40/0x50
[   29.093484]  [<ffffffff82df4a90>] ? SyS_getpeername+0x30/0x30
[   29.099337]  [<ffffffff81006d91>] do_fast_syscall_32+0x321/0x8a0
[   29.105451]  [<ffffffff8377b2aa>] sysenter_flags_fixed+0xd/0x17
[   29.111482] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 38 14 1b fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 9f 0b 00 00 41 f6 46 60 04 
[   29.138720] RIP  [<ffffffff831b0261>] udp_queue_rcv_skb+0x191/0x1560
[   29.145308]  RSP <ffff8801c73978b0>
[   29.148946] ---[ end trace ea73cd1ca6368658 ]---
[   29.153702] Kernel panic - not syncing: Fatal exception in interrupt
[   29.160590] Dumping ftrace buffer:
[   29.164460]    (ftrace buffer empty)
[   29.168142] Kernel Offset: disabled
[   29.171737] Rebooting in 86400 seconds..