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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c95
1 files changed, 90 insertions, 5 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 84c358804355..dcb1d434f7da 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -597,6 +597,43 @@ static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) },
};
+static int inet6_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_ipv6_policy, extack);
+
+ err = nlmsg_parse_strict(nlh, sizeof(struct netconfmsg), tb,
+ NETCONFA_MAX, devconf_ipv6_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 inet6_netconf_get_devconf(struct sk_buff *in_skb,
struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
@@ -605,14 +642,12 @@ static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
struct nlattr *tb[NETCONFA_MAX+1];
struct inet6_dev *in6_dev = NULL;
struct net_device *dev = NULL;
- struct netconfmsg *ncm;
struct sk_buff *skb;
struct ipv6_devconf *devconf;
int ifindex;
int err;
- err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
- devconf_ipv6_policy, extack);
+ err = inet6_netconf_valid_get_req(in_skb, nlh, tb, extack);
if (err < 0)
return err;
@@ -5181,6 +5216,52 @@ static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
return inet6_dump_addr(skb, cb, type);
}
+static int inet6_rtm_valid_getaddr_req(struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ struct ifaddrmsg *ifm;
+ int i, err;
+
+ if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid header for get address request");
+ return -EINVAL;
+ }
+
+ ifm = nlmsg_data(nlh);
+ if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for get address request");
+ return -EINVAL;
+ }
+
+ if (!netlink_strict_get_check(skb))
+ return nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX,
+ ifa_ipv6_policy, extack);
+
+ err = nlmsg_parse_strict(nlh, sizeof(*ifm), tb, IFA_MAX,
+ ifa_ipv6_policy, extack);
+ if (err)
+ return err;
+
+ for (i = 0; i <= IFA_MAX; i++) {
+ if (!tb[i])
+ continue;
+
+ switch (i) {
+ case IFA_TARGET_NETNSID:
+ case IFA_ADDRESS:
+ case IFA_LOCAL:
+ break;
+ default:
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in get address request");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
@@ -5201,8 +5282,7 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
struct sk_buff *skb;
int err;
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy,
- extack);
+ err = inet6_rtm_valid_getaddr_req(in_skb, nlh, tb, extack);
if (err < 0)
return err;
@@ -6824,6 +6904,11 @@ static int __net_init addrconf_init_net(struct net *net)
if (!dflt)
goto err_alloc_dflt;
+ if (sysctl_devconf_inherit_init_net == 1 && !net_eq(net, &init_net)) {
+ memcpy(all, init_net.ipv6.devconf_all, sizeof(ipv6_devconf));
+ memcpy(dflt, init_net.ipv6.devconf_dflt, sizeof(ipv6_devconf_dflt));
+ }
+
/* these will be inherited by all namespaces */
dflt->autoconf = ipv6_defaults.autoconf;
dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;