1 files changed, 4 insertions, 4 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index ce1386a67e24..ebd953bc5607 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -116,10 +116,10 @@ static void ip_cmsg_recv_checksum(struct msghdr *msg, struct sk_buff *skb,
         if (skb->ip_summed != CHECKSUM_COMPLETE)
                 return;
 
-        if (offset != 0)
-                csum = csum_sub(csum,
-                                csum_partial(skb_transport_header(skb) + tlen,
-                                             offset, 0));
+        if (offset != 0) {
+                int tend_off = skb_transport_offset(skb) + tlen;
+                csum = csum_sub(csum, skb_checksum(skb, tend_off, offset, 0));
+        }
 
         put_cmsg(msg, SOL_IP, IP_CHECKSUM, sizeof(__wsum), &csum);
 }