[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   18.442157] random: sshd: uninitialized urandom read (32 bytes read, 30 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.302636] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[   22.564772] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[   23.775950] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available)
[   50.491584] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available)
Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts.
[   55.891442] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available)
executing program
executing program
[   55.987244] kasan: CONFIG_KASAN_INLINE enabled
[   55.991680] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   56.004523] Dumping ftrace buffer:
[   56.008045]    (ftrace buffer empty)
[   56.011730] Modules linked in:
[   56.015022] CPU: 1 PID: 3698 Comm: syz-executor746 Not tainted 4.4.141-g1b37d68 #71
[   56.022783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.032108] task: ffff8800b1c4b000 task.stack: ffff8801cdc48000
[   56.038135] RIP: 0010:[<ffffffff834993df>]  [<ffffffff834993df>] udpv6_queue_rcv_skb+0x18f/0x1500
[   56.047242] RSP: 0018:ffff8801cdc4f890  EFLAGS: 00010206
[   56.052661] RAX: dffffc0000000000 RBX: ffff8801cde20000 RCX: 0000000000000000
[   56.059905] RDX: 000000000000000c RSI: ffffffff834993c6 RDI: 0000000000000060
[   56.067145] RBP: ffff8801cdc4f8d0 R08: 0000000000000001 R09: 0000000000000001
[   56.074387] R10: 0000000000000000 R11: ffff8800b1c4b000 R12: ffff8801cdccb280
[   56.081630] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cdccb2d8
[   56.088869] FS:  0000000001554880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   56.097065] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   56.102917] CR2: 0000000020000080 CR3: 00000001cea78000 CR4: 00000000001606f0
[   56.110160] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   56.117404] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   56.124642] Stack:
[   56.126762]  00000001cde20088 ffff8801cdccb280 ffff8801cde20088 ffff8801cde20000
[   56.134737]  ffff8801cdccb280 dffffc0000000000 ffff8801cdccb2d8 0000000000000000
[   56.142711]  ffff8801cdc4f940 ffffffff82f2b7db ffff8801cde20430 ffff8801cde20188
[   56.150776] Call Trace:
[   56.153337]  [<ffffffff82f2b7db>] release_sock+0x17b/0x500
[   56.158934]  [<ffffffff83495dc7>] udpv6_sendmsg+0x917/0x24c0
[   56.164703]  [<ffffffff83491160>] ? __udpv6_queue_rcv_skb+0x480/0x480
[   56.171266]  [<ffffffff834954b0>] ? udp6_lib_lookup2+0x990/0x990
[   56.177384]  [<ffffffff8122f070>] ? debug_check_no_locks_freed+0x210/0x210
[   56.184368]  [<ffffffff81c6eb01>] ? sock_has_perm+0x1c1/0x400
[   56.190223]  [<ffffffff81c6ebdf>] ? sock_has_perm+0x29f/0x400
[   56.196085]  [<ffffffff81c6e9df>] ? sock_has_perm+0x9f/0x400
[   56.201863]  [<ffffffff83301053>] ? inet_sendmsg+0x143/0x4d0
[   56.207631]  [<ffffffff83301113>] inet_sendmsg+0x203/0x4d0
[   56.213228]  [<ffffffff83300f83>] ? inet_sendmsg+0x73/0x4d0
[   56.218909]  [<ffffffff83300f10>] ? inet_recvmsg+0x4c0/0x4c0
[   56.224679]  [<ffffffff82f1e2fc>] sock_sendmsg+0xcc/0x110
[   56.230189]  [<ffffffff82f1efdc>] SYSC_sendto+0x21c/0x370
[   56.235697]  [<ffffffff82f1edc0>] ? SYSC_connect+0x300/0x300
[   56.241490]  [<ffffffff83494697>] ? udp_v6_get_port+0xa7/0xd0
[   56.247353]  [<ffffffff8341e29b>] ? inet6_bind+0x13b/0xf50
[   56.252961]  [<ffffffff82f1ea1a>] ? SYSC_bind+0x1da/0x280
[   56.258472]  [<ffffffff8148877e>] ? vmacache_update+0xfe/0x130
[   56.264415]  [<ffffffff810d7b0a>] ? __do_page_fault+0x38a/0xa10
[   56.270448]  [<ffffffff838c37d8>] ? retint_user+0x18/0x3c
[   56.275958]  [<ffffffff82f21660>] SyS_sendto+0x40/0x50
[   56.281206]  [<ffffffff838c2c25>] entry_SYSCALL_64_fastpath+0x22/0x9e
[   56.287752] Code: 74 24 58 41 f6 c6 01 0f 85 e2 07 00 00 e8 5a 81 eb fd 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 c1 0d 00 00 41 f6 46 60 04 
[   56.314435] RIP  [<ffffffff834993df>] udpv6_queue_rcv_skb+0x18f/0x1500
[   56.321198]  RSP <ffff8801cdc4f890>
[   56.324828] ---[ end trace 0e77411608e77ae0 ]---
[   56.329569] Kernel panic - not syncing: Fatal exception in interrupt
[   56.336419] Dumping ftrace buffer:
[   56.339934]    (ftrace buffer empty)
[   56.343620] Kernel Offset: disabled
[   56.347220] Rebooting in 86400 seconds..