1 files changed, 3 insertions, 0 deletions

diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c
index 037958ff8eed..4acacf3c6617 100644
--- a/net/x25/x25_link.c
+++ b/net/x25/x25_link.c
@@ -90,6 +90,9 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *nb,
                 break;
 
         case X25_DIAGNOSTIC:
+                if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 4))
+                        break;
+
                 printk(KERN_WARNING "x25: diagnostic #%d - %02X %02X %02X\n",
                        skb->data[3], skb->data[4],
                        skb->data[5], skb->data[6]);