rtnetlink: Mask the rta_type when range checking

[~andy/linux] / net / core / rtnetlink.c

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index a585d45cc9d9faefbc51fde485971a1336065e58..5fb8d7e472941fede3595a3a4032cfc21fbe849b 100644 (file)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2621,7 +2621,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
 
                while (RTA_OK(attr, attrlen)) {
-                       unsigned int flavor = attr->rta_type;
+                       unsigned int flavor = attr->rta_type & NLA_TYPE_MASK;
                        if (flavor) {
                                if (flavor > rta_max[sz_idx])
                                        return -EINVAL;