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 3.17-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-3.17 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 11:36:50 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-3.17/vxlan-fix-a-use-after-free-in-vxlan_encap_bypass.patch
queue-3.17/vxlan-using-pskb_may_pull-as-early-as-possible.patch
queue-3.17/vxlan-fix-a-free-after-use.patch
queue-3.17/ipv4-fix-a-potential-use-after-free-in-ip_tunnel_core.c.patch
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