diff options
| -rw-r--r-- | net/netlink/attr.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/netlink/attr.c b/net/netlink/attr.c index c83fea7da9a8..56c3ce7fe29a 100644 --- a/net/netlink/attr.c +++ b/net/netlink/attr.c @@ -83,6 +83,12 @@ static int validate_nla(struct nlattr *nla, int maxtype, if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN + nla_len(nla)) return -ERANGE; break; + case NLA_NESTED: + /* a nested attributes is allowed to be empty; if its not, + * it must have a size of at least NLA_HDRLEN. + */ + if (attrlen == 0) + break; default: if (pt->len) minlen = pt->len; |