From a5b8db91442fce9c9713fcd656c3698f1adde1d6 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Mar 2013 04:18:58 +0000 Subject: 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(-) (limited to 'net/core/rtnetlink.c') 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; -- cgit v1.2.1 From fcca143d696092110ae1e361866576804fe887f3 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Wed, 27 Mar 2013 03:22:45 +0000 Subject: rtnetlink: fix error return code in rtnl_link_fill() Fix to return a negative error code from the error handling case instead of 0(possible overwrite to 0 by ops->fill_xstats call), as returned elsewhere in this function. Signed-off-by: Wei Yongjun Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 5fb8d7e47294..b65441da74ab 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -496,8 +496,10 @@ static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) } if (ops->fill_info) { data = nla_nest_start(skb, IFLA_INFO_DATA); - if (data == NULL) + if (data == NULL) { + err = -EMSGSIZE; goto err_cancel_link; + } err = ops->fill_info(skb, dev); if (err < 0) goto err_cancel_data; -- cgit v1.2.1