batman-adv: fix uninit-value in batadv_netlink_get_ifindex()

[android-x86/kernel.git] / net / batman-adv / netlink.c

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 6f08fd1..7e052d6 100644 (file)
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -164,7 +164,7 @@ batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
 {
        struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
 
-       return attr ? nla_get_u32(attr) : 0;
+       return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
 }
 
 /**