[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: Adrian Bunk <bunk@stusta.de>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index da51d01a51030372e1228831620f3ce4f3c91a5a..19df8fedeb7524e46aa22b3ba7e71e3b8ec02f63 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1137,6 +1137,7 @@ int udp_rcv(struct sk_buff *skb)
 
        if (pskb_trim_rcsum(skb, ulen))
                goto short_packet;
+       uh = skb->h.uh;
 
        udp_checksum_init(skb, uh, ulen, saddr, daddr);