From a5b8db91442fce9c9713fcd656c3698f1adde1d6 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Mar 2013 04:18:58 +0000 Subject: [PATCH] rtnetlink: Mask the rta_type when range checking Range/validity checks on rta_type in rtnetlink_rcv_msg() do not account for flags that may be set. This causes the function to return -EINVAL when flags are set on the type (for example NLA_F_NESTED). Signed-off-by: Vlad Yasevich Acked-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index a585d45cc9d9..5fb8d7e47294 100644 --- 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; -- 2.20.1