From 83d8af5f4226c3ab9156cbb77d5b079b65f31f19 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Wed, 7 Mar 2007 18:50:54 -0800
Subject: [PATCH] Fix UDP header pointer after pskb_trim_rcsum()

[UDP]: Reread uh pointer after pskb_trim

The header may have moved when trimming.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 net/ipv4/udp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index cfff930f2baf..f8068b06a261 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1214,6 +1214,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
 
 		if (ulen < sizeof(*uh) || pskb_trim_rcsum(skb, ulen))
 			goto short_packet;
+		uh = skb->h.uh;
 
 		udp4_csum_init(skb, uh);
 
-- 
2.39.5