Patch "ipv6: fix possible mem leaks in ipv6_make_skb()" has been added to the 4.4-stable tree

Patch "ipv6: fix possible mem leaks in ipv6_make_skb()" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ipv6: fix possible mem leaks in ipv6_make_skb()

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ipv6-fix-possible-mem-leaks-in-ipv6_make_skb.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sat Jan 13 14:28:20 CET 2018
From: Eric Dumazet <edumazet@google.com>
Date: Wed, 10 Jan 2018 03:45:49 -0800
Subject: ipv6: fix possible mem leaks in ipv6_make_skb()

From: Eric Dumazet <edumazet@google.com>


[ Upstream commit 862c03ee1deb7e19e0f9931682e0294ecd1fcaf9 ]

ip6_setup_cork() might return an error, while memory allocations have
been done and must be rolled back.

Fixes: 6422398c2ab0 ("ipv6: introduce ipv6_make_skb")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Reported-by: Mike Maloney <maloney@google.com>
Acked-by:  Mike Maloney <maloney@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/ip6_output.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1785,8 +1785,10 @@ struct sk_buff *ip6_make_skb(struct sock
 	cork.base.opt = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, hlimit, tclass, opt, rt, fl6);
-	if (err)
+	if (err) {
+		ip6_cork_release(&cork, &v6_cork);
 		return ERR_PTR(err);
+	}
 
 	if (dontfrag < 0)
 		dontfrag = inet6_sk(sk)->dontfrag;


Patches currently in stable-queue which might be from edumazet@google.com are

queue-4.4/lan78xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch
queue-4.4/cx82310_eth-use-skb_cow_head-to-deal-with-cloned-skbs.patch
queue-4.4/sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch
queue-4.4/smsc75xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch
queue-4.4/ipv6-fix-possible-mem-leaks-in-ipv6_make_skb.patch