Netlink messages are appended, one object at a time, to the end of
the SKB. Therefore we need to test skb_tail_pointer(), not skb->data,
for alignment purposes.
Fixes: 35c5845957c7 ("net: Add helpers for 64-bit aligning netlink attributes.")
Signed-off-by: David S. Miller <[email protected]>
---
This is like a never ending story....
include/net/netlink.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/netlink.h b/include/net/netlink.h
index cf95df1..3c1fd92 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -1250,7 +1250,7 @@ static inline int nla_align_64bit(struct sk_buff *skb,
int padattr)
* nlattr header for next attribute, will make nla_data()
* 8-byte aligned.
*/
- if (IS_ALIGNED((unsigned long)skb->data, 8) &&
+ if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8) &&
!nla_reserve(skb, padattr, 0))
return -EMSGSIZE;
#endif
--
2.4.1
