net: skb_fclone_busy() needs to detect orphaned skb

[sfrench/cifs-2.6.git] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5884f95ff0e9a547567738da346dafb882968fa8..6c8b6f604e7609f2d320a7aa572a8ec6a870f4b8 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -799,15 +799,19 @@ struct sk_buff_fclones {
  *     @skb: buffer
  *
  * Returns true is skb is a fast clone, and its clone is not freed.
+ * Some drivers call skb_orphan() in their ndo_start_xmit(),
+ * so we also check that this didnt happen.
  */
-static inline bool skb_fclone_busy(const struct sk_buff *skb)
+static inline bool skb_fclone_busy(const struct sock *sk,
+                                  const struct sk_buff *skb)
 {
        const struct sk_buff_fclones *fclones;
 
        fclones = container_of(skb, struct sk_buff_fclones, skb1);
 
        return skb->fclone == SKB_FCLONE_ORIG &&
-              fclones->skb2.fclone == SKB_FCLONE_CLONE;
+              fclones->skb2.fclone == SKB_FCLONE_CLONE &&
+              fclones->skb2.sk == sk;
 }
 
 static inline struct sk_buff *alloc_skb_fclone(unsigned int size,