Commit c2ceff11 authored Jan 11, 2018 by Eric Dumazet Committed by Greg Kroah-Hartman Jan 31, 2018

ipv6: ip6_make_skb() needs to clear cork.base.dst




[ Upstream commit 95ef498d977bf44ac094778fd448b98af158a3e6 ]

In my last patch, I missed fact that cork.base.dst was not initialized
in ip6_make_skb() :

If ip6_setup_cork() returns an error, we might attempt a dst_release()
on some random pointer.

Fixes: 862c03ee1deb ("ipv6: fix possible mem leaks in ipv6_make_skb()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent fb50d8c9

net/ipv6/ip6_output.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1800,6 +1800,7 @@ struct sk_buff ip6_make_skb(struct sock sk,
		cork.base.flags = 0;
		cork.base.addr = 0;
		cork.base.opt = NULL;
		cork.base.dst = NULL;
		v6_cork.opt = NULL;
		err = ip6_setup_cork(sk, &cork, &v6_cork, ipc6, rt, fl6);
		if (err) {