Patch "ipv4: fix a potential use after free in ip_tunnel_core.c" has been added to the 3.14-stable tree

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

    ipv4: fix a potential use after free in ip_tunnel_core.c

to the 3.14-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:
     ipv4-fix-a-potential-use-after-free-in-ip_tunnel_core.c.patch
and it can be found in the queue-3.14 subdirectory.

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


>From foo@baz Fri Nov  7 11:37:05 PST 2014
From: Li RongQing <roy.qing.li@xxxxxxxxx>
Date: Fri, 17 Oct 2014 16:53:23 +0800
Subject: ipv4: fix a potential use after free in ip_tunnel_core.c

From: Li RongQing <roy.qing.li@xxxxxxxxx>

[ Upstream commit 1245dfc8cadb258386fcd27df38215a0eccb1f17 ]

pskb_may_pull() maybe change skb->data and make eth pointer oboslete,
so set eth after pskb_may_pull()

Fixes:3d7b46cd("ip_tunnel: push generic protocol handling to ip_tunnel module")
Cc: Pravin B Shelar <pshelar@xxxxxxxxxx>
Signed-off-by: Li RongQing <roy.qing.li@xxxxxxxxx>
Acked-by: Pravin B Shelar <pshelar@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv4/ip_tunnel_core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -91,11 +91,12 @@ int iptunnel_pull_header(struct sk_buff
 	skb_pull_rcsum(skb, hdr_len);
 
 	if (inner_proto == htons(ETH_P_TEB)) {
-		struct ethhdr *eh = (struct ethhdr *)skb->data;
+		struct ethhdr *eh;
 
 		if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 			return -ENOMEM;
 
+		eh = (struct ethhdr *)skb->data;
 		if (likely(ntohs(eh->h_proto) >= ETH_P_802_3_MIN))
 			skb->protocol = eh->h_proto;
 		else


Patches currently in stable-queue which might be from roy.qing.li@xxxxxxxxx are

queue-3.14/vxlan-fix-a-use-after-free-in-vxlan_encap_bypass.patch
queue-3.14/vxlan-using-pskb_may_pull-as-early-as-possible.patch
queue-3.14/vxlan-fix-a-free-after-use.patch
queue-3.14/ipv4-fix-a-potential-use-after-free-in-ip_tunnel_core.c.patch
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