[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.165604] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   23.906239] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   24.272414] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   24.840252] random: sshd: uninitialized urandom read (32 bytes read, 54 bits of entropy available)
[   25.008764] random: sshd: uninitialized urandom read (32 bytes read, 58 bits of entropy available)
Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts.
[   30.420847] random: sshd: uninitialized urandom read (32 bytes read, 64 bits of entropy available)
executing program
executing program
[   30.512323] kasan: CONFIG_KASAN_INLINE enabled
[   30.516747] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   30.529572] Dumping ftrace buffer:
[   30.533088]    (ftrace buffer empty)
[   30.536773] Modules linked in:
[   30.540056] CPU: 0 PID: 3848 Comm: syz-executor995 Not tainted 4.4.145-g2241aa9 #78
[   30.547816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.557141] task: ffff8800bb874800 task.stack: ffff8801d8de0000
[   30.563170] RIP: 0010:[<ffffffff832d86ef>]  [<ffffffff832d86ef>] udp_queue_rcv_skb+0x18f/0x1580
[   30.572102] RSP: 0018:ffff8801d8de7930  EFLAGS: 00010206
[   30.577522] RAX: dffffc0000000000 RBX: ffff8801d9780000 RCX: 1ffff1003995bd4b
[   30.584765] RDX: 000000000000000c RSI: ffffffff832d86d6 RDI: 0000000000000060
[   30.592009] RBP: ffff8801d8de7970 R08: ffffffff85334870 R09: 0000000000000001
[   30.599248] R10: 0000000000000000 R11: ffff8800bb874800 R12: ffff8801ccadea00
[   30.606488] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ccadea58
[   30.613739] FS:  0000000001a28880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   30.621933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.627785] CR2: 0000000020000000 CR3: 00000001ca7d1000 CR4: 00000000001606f0
[   30.635033] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.642274] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.649512] Stack:
[   30.651631]  ffff8801d9780088 ffff880100000001 ffff8801d9780088 ffff8801d9780000
[   30.659610]  ffff8801ccadea00 dffffc0000000000 ffff8801ccadea58 0000000000000000
[   30.667601]  ffff8801d8de79e0 ffffffff82f302fb ffff8801d9780430 ffff8801d9780188
[   30.675578] Call Trace:
[   30.678139]  [<ffffffff82f302fb>] release_sock+0x17b/0x500
[   30.683735]  [<ffffffff832d6312>] udp_sendmsg+0x1152/0x1c70
[   30.689417]  [<ffffffff832ce450>] ? udp_push_pending_frames+0xe0/0xe0
[   30.695965]  [<ffffffff832d51c0>] ? udp4_lib_lookup+0x60/0x60
[   30.701878]  [<ffffffff812312c0>] ? debug_check_no_locks_freed+0x210/0x210
[   30.708866]  [<ffffffff81c72171>] ? sock_has_perm+0x1c1/0x400
[   30.714720]  [<ffffffff81c7224f>] ? sock_has_perm+0x29f/0x400
[   30.720577]  [<ffffffff81c7204f>] ? sock_has_perm+0x9f/0x400
[   30.726345]  [<ffffffff833063f3>] ? inet_sendmsg+0x143/0x4d0
[   30.732112]  [<ffffffff833064b3>] inet_sendmsg+0x203/0x4d0
[   30.737707]  [<ffffffff83306323>] ? inet_sendmsg+0x73/0x4d0
[   30.743386]  [<ffffffff833062b0>] ? inet_recvmsg+0x4c0/0x4c0
[   30.749155]  [<ffffffff82f22e1c>] sock_sendmsg+0xcc/0x110
[   30.754661]  [<ffffffff82f23afc>] SYSC_sendto+0x21c/0x370
[   30.760255]  [<ffffffff82f238e0>] ? SYSC_connect+0x300/0x300
[   30.766025]  [<ffffffff81231d46>] ? __lock_acquire+0xa86/0x5270
[   30.772052]  [<ffffffff832d3819>] ? udp_v4_get_port+0x139/0x180
[   30.778081]  [<ffffffff812312c0>] ? debug_check_no_locks_freed+0x210/0x210
[   30.785068]  [<ffffffff82f2353a>] ? SYSC_bind+0x1da/0x280
[   30.790583]  [<ffffffff8157e0a5>] ? SyS_dup2+0x3c5/0x5e0
[   30.796005]  [<ffffffff82f26180>] SyS_sendto+0x40/0x50
[   30.801256]  [<ffffffff838c84e5>] entry_SYSCALL_64_fastpath+0x22/0x9e
[   30.807803] Code: 74 24 58 41 f6 c6 01 0f 85 ae 07 00 00 e8 9a b0 07 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 2d 0e 00 00 41 f6 46 60 04 
[   30.834755] RIP  [<ffffffff832d86ef>] udp_queue_rcv_skb+0x18f/0x1580
[   30.841345]  RSP <ffff8801d8de7930>
[   30.844973] ---[ end trace ba6458ed68412090 ]---
[   30.849722] Kernel panic - not syncing: Fatal exception in interrupt
[   30.856570] Dumping ftrace buffer:
[   30.860082]    (ftrace buffer empty)
[   30.863766] Kernel Offset: disabled
[   30.867361] Rebooting in 86400 seconds..