Re: [PATCH net] ipv6: ip6_make_skb() needs to clear cork.base.dst

[David Miller]

From: Eric Dumazet 
Date: Thu, 11 Jan 2018 22:31:18 -0800

> From: Eric Dumazet 
> 
> 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 
> Reported-by: syzbot 

Applied and queued up for -stable, thanks Eric.

[PATCH net] ipv6: ip6_make_skb() needs to clear cork.base.dst

[Eric Dumazet]

From: Eric Dumazet 

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 
Reported-by: syzbot 
---
 net/ipv6/ip6_output.c |1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 
688ba5f7516b37c87b879036dce781bdcfa01739..78a774e7af12b5725577fb4aa3c917af2e171a8d
 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1733,6 +1733,7 @@ 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, ipc6, rt, fl6);
if (err) {