[SCTP]: Don't do CRC32C checksum over loopback.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index 70d6606e2812..42b66e74bbb5 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -141,7 +141,8 @@ int sctp_rcv(struct sk_buff *skb)
         __skb_pull(skb, skb->h.raw - skb->data);
         if (skb->len < sizeof(struct sctphdr))
                 goto discard_it;
-        if (sctp_rcv_checksum(skb) < 0)
+        if ((skb->ip_summed != CHECKSUM_UNNECESSARY) &&
+            (sctp_rcv_checksum(skb) < 0))
                 goto discard_it;
 
         skb_pull(skb, sizeof(struct sctphdr));