1 files changed, 4 insertions, 3 deletions

diff --git a/include/net/udp.h b/include/net/udp.h
index cc8036987dcb..586de4b811b5 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -366,12 +366,13 @@ static inline bool udp_skb_is_linear(struct sk_buff *skb)
 static inline int copy_linear_skb(struct sk_buff *skb, int len, int off,
                                   struct iov_iter *to)
 {
-        int n, copy = len - off;
+        int n;
 
-        n = copy_to_iter(skb->data + off, copy, to);
-        if (n == copy)
+        n = copy_to_iter(skb->data + off, len, to);
+        if (n == len)
                 return 0;
 
+        iov_iter_revert(to, n);
         return -EFAULT;
 }