1 files changed, 9 insertions, 14 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 52ba96a64a1f..61627036eb2b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2894,22 +2894,17 @@ static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
 static int
 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
-        struct rtattr **rta = arg;
-        struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+        struct ifaddrmsg *ifm;
+        struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *pfx;
+        int err;
 
-        pfx = NULL;
-        if (rta[IFA_ADDRESS-1]) {
-                if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
-                        return -EINVAL;
-                pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
-        }
-        if (rta[IFA_LOCAL-1]) {
-                if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
-                    (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
-                        return -EINVAL;
-                pfx = RTA_DATA(rta[IFA_LOCAL-1]);
-        }
+        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
+        if (err < 0)
+                return err;
+
+        ifm = nlmsg_data(nlh);
+        pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
         if (pfx == NULL)
                 return -EINVAL;