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-rw-r--r--include/linux/rtnetlink.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 5a5cda16026..6fff8c4c99c 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -924,7 +924,8 @@ extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const voi
(skb)->len; })
#define RTA_NEST_CANCEL(skb, start) \
-({ skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
+({ if (start) \
+ skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
-1; })
#define RTA_GET_U32(rta) \