[IPV6]: Need to use pskb_trim_rcsum().

Fix pskb_trim usage in ipv6. Only the udp one is really
a bug, other places are just doing equivalent code.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 8 insertions, 12 deletions

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 5be6da2584ee..3b9fa900a4bf 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -459,11 +459,10 @@ static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
                 IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
                 goto drop;
         }
-        if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
-                __pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr));
-                if (skb->ip_summed == CHECKSUM_HW)
-                        skb->ip_summed = CHECKSUM_NONE;
-        }
+
+        if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
+                goto drop;
+
         return 1;
 
 drop:
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 9d9e04344c77..e4fe9ee484dd 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -479,12 +479,9 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
         /* Point into the IP datagram 'data' part. */
         if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data))
                 goto err;
-        if (end-offset < skb->len) {
-                if (pskb_trim(skb, end - offset))
-                        goto err;
-                if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-                        skb->ip_summed = CHECKSUM_NONE;
-        }
+        
+        if (pskb_trim_rcsum(skb, end - offset))
+                goto err;
 
         /* Find out which fragments are in front and at the back of us
          * in the chain of fragments so far.  We must know where to put
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 390d750449ce..7cbcaa30cf5e 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -483,7 +483,7 @@ static int udpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
         }
 
         if (ulen < skb->len) {
-                if (__pskb_trim(skb, ulen))
+                if (pskb_trim_rcsum(skb, ulen))
                         goto discard;
                 saddr = &skb->nh.ipv6h->saddr;
                 daddr = &skb->nh.ipv6h->daddr;