netlink: Return extack message if attribute validation fails

Have one extack message for parsing and validating.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/lib/nlattr.c b/lib/nlattr.c
index dfa55c873c1318643fdbcbe916b9c18a54edc4c9..e335bcafa9e4c3012de2f0f8606c3e542008f7b3 100644 (file)
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -253,8 +253,8 @@ int nla_parse(struct nlattr **tb, int maxtype, const struct nlattr *head,
                        if (policy) {
                                err = validate_nla(nla, maxtype, policy);
                                if (err < 0) {
-                                       if (extack)
-                                               extack->bad_attr = nla;
+                                       NL_SET_ERR_MSG_ATTR(extack, nla,
+                                                           "Attribute failed policy validation");
                                        goto errout;
                                }
                        }