1 files changed, 7 insertions, 4 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index c182db7d691f..69444d32ecda 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -119,7 +119,13 @@ int sctp_rcv(struct sk_buff *skb)
                        skb_transport_offset(skb))
                 goto discard_it;
 
-        if (!pskb_may_pull(skb, sizeof(struct sctphdr)))
+        /* If the packet is fragmented and we need to do crc checking,
+         * it's better to just linearize it otherwise crc computing
+         * takes longer.
+         */
+        if ((!(skb_shinfo(skb)->gso_type & SKB_GSO_SCTP) &&
+             skb_linearize(skb)) ||
+            !pskb_may_pull(skb, sizeof(struct sctphdr)))
                 goto discard_it;
 
         /* Pull up the IP header. */
@@ -1177,9 +1183,6 @@ static struct sctp_association *__sctp_rcv_lookup_harder(struct net *net,
         if ((skb_shinfo(skb)->gso_type & SKB_GSO_SCTP) == SKB_GSO_SCTP)
                 return NULL;
 
-        if (skb_linearize(skb))
-                return NULL;
-
         ch = (sctp_chunkhdr_t *) skb->data;
 
         /* The code below will attempt to walk the chunk and extract