1 files changed, 2 insertions, 1 deletions

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index aa567b09ea9a..5f03e4ea65bf 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -295,7 +295,8 @@ static struct sock *x25_find_listener(struct x25_address *addr,
                          * Found a listening socket, now check the incoming
                          * call user data vs this sockets call user data
                          */
-                        if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
+                        if (x25_sk(s)->cudmatchlength > 0 &&
+                                skb->len >= x25_sk(s)->cudmatchlength) {
                                 if((memcmp(x25_sk(s)->calluserdata.cuddata,
                                         skb->data,
                                         x25_sk(s)->cudmatchlength)) == 0) {