From: David S. Miller <davem@davemloft.net>
Date: Wed, 6 Jul 2011 14:30:59 +0000 (-0700)
Subject: packet: Fix leak in pre-defrag support.
X-Git-Tag: firefly_0821_release~3680^2~5008^2~217
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aec27311c23a8ce8eaf490762249d3ed74be83b6;p=firefly-linux-kernel-4.4.55.git

packet: Fix leak in pre-defrag support.

When we clone the SKB, we forget about the original
one.  Avoid this problem by using skb_share_check().

Reported-by: Penttilä Mika <mika.penttila@ixonos.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 41f0489ff665..aec50a1e9849 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -476,7 +476,7 @@ static struct sk_buff *fanout_check_defrag(struct sk_buff *skb)
 		return skb;
 
 	if (ip_is_fragment(ip_hdr(skb))) {
-		skb = skb_clone(skb, GFP_ATOMIC);
+		skb = skb_share_check(skb, GFP_ATOMIC);
 		if (skb) {
 			if (pskb_trim_rcsum(skb, len))
 				return skb;