[DECNET] address: Convert to new netlink interface

Extends the netlink interface to support the __le16 type and
converts address addition, deletion and, dumping to use the
new netlink interface.

Fixes multiple occasions of possible illegal memory references
due to not validated netlink attributes.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/net/netlink.h b/include/net/netlink.h
index 30021339157c..fd75fd65d59e 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -829,6 +829,9 @@ static inline int nla_put_msecs(struct sk_buff *skb, int attrtype,
 #define NLA_PUT_U16(skb, attrtype, value) \
         NLA_PUT_TYPE(skb, u16, attrtype, value)
 
+#define NLA_PUT_LE16(skb, attrtype, value) \
+        NLA_PUT_TYPE(skb, __le16, attrtype, value)
+
 #define NLA_PUT_U32(skb, attrtype, value) \
         NLA_PUT_TYPE(skb, u32, attrtype, value)
 
@@ -875,6 +878,15 @@ static inline u16 nla_get_u16(struct nlattr *nla)
 }
 
 /**
+ * nla_get_le16 - return payload of __le16 attribute
+ * @nla: __le16 netlink attribute
+ */
+static inline __le16 nla_get_le16(struct nlattr *nla)
+{
+        return *(__le16 *) nla_data(nla);
+}
+
+/**
  * nla_get_u8 - return payload of u8 attribute
  * @nla: u8 netlink attribute
  */