This is a note to let you know that I've just added the patch titled
ipv6: l2tp: fix a potential issue in l2tp_ip6_recv
to the 4.5-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-l2tp-fix-a-potential-issue-in-l2tp_ip6_recv.patch
and it can be found in the queue-4.5 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 Sat Apr 16 09:15:18 PDT 2016
From: Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 3 Apr 2016 22:09:24 +0800
Subject: ipv6: l2tp: fix a potential issue in l2tp_ip6_recv
From: Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>
[ Upstream commit be447f305494e019dfc37ea4cdf3b0e4200b4eba ]
pskb_may_pull() can change skb->data, so we have to load ptr/optr at the
right place.
Signed-off-by: Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/l2tp/l2tp_ip6.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -135,12 +135,11 @@ static int l2tp_ip6_recv(struct sk_buff
struct l2tp_tunnel *tunnel = NULL;
int length;
- /* Point to L2TP header */
- optr = ptr = skb->data;
-
if (!pskb_may_pull(skb, 4))
goto discard;
+ /* Point to L2TP header */
+ optr = ptr = skb->data;
session_id = ntohl(*((__be32 *) ptr));
ptr += 4;
@@ -168,6 +167,9 @@ static int l2tp_ip6_recv(struct sk_buff
if (!pskb_may_pull(skb, length))
goto discard;
+ /* Point to L2TP header */
+ optr = ptr = skb->data;
+ ptr += 4;
pr_debug("%s: ip recv\n", tunnel->name);
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ptr, length);
}
Patches currently in stable-queue which might be from yanhaishuang@xxxxxxxxxxxxxxxxxxxx are
queue-4.5/bridge-allow-set-bridge-ageing-time-when-switchdev-disabled.patch
queue-4.5/ipv4-l2tp-fix-a-potential-issue-in-l2tp_ip_recv.patch
queue-4.5/ipv6-l2tp-fix-a-potential-issue-in-l2tp_ip6_recv.patch
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