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path: root/net/mpls/af_mpls.c
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Diffstat (limited to 'net/mpls/af_mpls.c')
-rw-r--r--net/mpls/af_mpls.c103
1 files changed, 98 insertions, 5 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index fa763e2e50ec..f7c544592ec8 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1209,21 +1209,57 @@ static const struct nla_policy devconf_mpls_policy[NETCONFA_MAX + 1] = {
[NETCONFA_IFINDEX] = { .len = sizeof(int) },
};
+static int mpls_netconf_valid_get_req(struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ int i, err;
+
+ if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct netconfmsg))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Invalid header for netconf get request");
+ return -EINVAL;
+ }
+
+ if (!netlink_strict_get_check(skb))
+ return nlmsg_parse(nlh, sizeof(struct netconfmsg), tb,
+ NETCONFA_MAX, devconf_mpls_policy, extack);
+
+ err = nlmsg_parse_strict(nlh, sizeof(struct netconfmsg), tb,
+ NETCONFA_MAX, devconf_mpls_policy, extack);
+ if (err)
+ return err;
+
+ for (i = 0; i <= NETCONFA_MAX; i++) {
+ if (!tb[i])
+ continue;
+
+ switch (i) {
+ case NETCONFA_IFINDEX:
+ break;
+ default:
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in netconf get request");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int mpls_netconf_get_devconf(struct sk_buff *in_skb,
struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct net *net = sock_net(in_skb->sk);
struct nlattr *tb[NETCONFA_MAX + 1];
- struct netconfmsg *ncm;
struct net_device *dev;
struct mpls_dev *mdev;
struct sk_buff *skb;
int ifindex;
int err;
- err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
- devconf_mpls_policy, extack);
+ err = mpls_netconf_valid_get_req(in_skb, nlh, tb, extack);
if (err < 0)
goto errout;
@@ -2239,6 +2275,64 @@ errout:
rtnl_set_sk_err(net, RTNLGRP_MPLS_ROUTE, err);
}
+static int mpls_valid_getroute_req(struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ struct rtmsg *rtm;
+ int i, err;
+
+ if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Invalid header for get route request");
+ return -EINVAL;
+ }
+
+ if (!netlink_strict_get_check(skb))
+ return nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX,
+ rtm_mpls_policy, extack);
+
+ rtm = nlmsg_data(nlh);
+ if ((rtm->rtm_dst_len && rtm->rtm_dst_len != 20) ||
+ rtm->rtm_src_len || rtm->rtm_tos || rtm->rtm_table ||
+ rtm->rtm_protocol || rtm->rtm_scope || rtm->rtm_type) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for get route request");
+ return -EINVAL;
+ }
+ if (rtm->rtm_flags & ~RTM_F_FIB_MATCH) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Invalid flags for get route request");
+ return -EINVAL;
+ }
+
+ err = nlmsg_parse_strict(nlh, sizeof(*rtm), tb, RTA_MAX,
+ rtm_mpls_policy, extack);
+ if (err)
+ return err;
+
+ if ((tb[RTA_DST] || tb[RTA_NEWDST]) && !rtm->rtm_dst_len) {
+ NL_SET_ERR_MSG_MOD(extack, "rtm_dst_len must be 20 for MPLS");
+ return -EINVAL;
+ }
+
+ for (i = 0; i <= RTA_MAX; i++) {
+ if (!tb[i])
+ continue;
+
+ switch (i) {
+ case RTA_DST:
+ case RTA_NEWDST:
+ break;
+ default:
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in get route request");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int mpls_getroute(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
struct netlink_ext_ack *extack)
{
@@ -2258,8 +2352,7 @@ static int mpls_getroute(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
u8 n_labels;
int err;
- err = nlmsg_parse(in_nlh, sizeof(*rtm), tb, RTA_MAX,
- rtm_mpls_policy, extack);
+ err = mpls_valid_getroute_req(in_skb, in_nlh, tb, extack);
if (err < 0)
goto errout;