random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available)
Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffff83307d8e

CPU: 0 PID: 3323 Comm: syzkaller911762 Not tainted 4.4.112-g5f6325b #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 64554547b14cd94c ffff8800b4117658 ffffffff81d0579d
 ffffffff83843020 ffff8800b4117730 00000000000005b4 ffff8801cc840064
 0000000000000040 ffff8800b4117720 ffffffff81419e6a 0000000041b58ab3
Call Trace:
 [<ffffffff81d0579d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0579d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81419e6a>] panic+0x1aa/0x388 kernel/panic.c:112
 [<ffffffff8112d452>] __stack_chk_fail+0x22/0x30 kernel/panic.c:506
 [<ffffffff83307d8e>] ip6_xmit+0x170e/0x1ad0 net/ipv6/ip6_output.c:256
 [<ffffffff833c8e06>] inet6_csk_xmit+0x246/0x480 net/ipv6/inet6_connection_sock.c:176
 [<ffffffff8345b4af>] l2tp_xmit_core net/l2tp/l2tp_core.c:1084 [inline]
 [<ffffffff8345b4af>] l2tp_xmit_skb+0xc2f/0xea0 net/l2tp/l2tp_core.c:1179
 [<ffffffff83467f94>] pppol2tp_sendmsg+0x584/0x7f0 net/l2tp/l2tp_ppp.c:355
 [<ffffffff82dee4ba>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dee4ba>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82df0091>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82df20e3>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82df21cd>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82df21cd>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83776499>] entry_SYSCALL_64_fastpath+0x16/0x92
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..