4.9-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
[ 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 --- net/ipv6/ip6_output.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1800,6 +1800,7 @@ struct sk_buff *ip6_make_skb(struct sock 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) {