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authorDavid Ahern <dsahern@gmail.com>2018-10-07 20:16:35 -0700
committerDavid S. Miller <davem@davemloft.net>2018-10-08 10:39:05 -0700
commite8ba330ac0c55004e775eab53fa1e748e5d71bdb (patch)
tree7395f21e571ed0d138ec5c6981cecab92942bb1f /net/mpls
parent14fc5bb29fe78aaa1777cfee248339497e30c02e (diff)
downloadlinux-stericsson-e8ba330ac0c55004e775eab53fa1e748e5d71bdb.tar.gz
rtnetlink: Update fib dumps for strict data checking
Add helper to check netlink message for route dumps. If the strict flag is set the dump request is expected to have an rtmsg struct as the header. All elements of the struct are expected to be 0 with the exception of rtm_flags (which is used by both ipv4 and ipv6 dumps) and no attributes can be appended. rtm_flags can only have RTM_F_CLONED and RTM_F_PREFIX set. Update inet_dump_fib, inet6_dump_fib, mpls_dump_routes, ipmr_rtm_dumproute, and ip6mr_rtm_dumproute to call this helper if strict data checking is enabled. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mpls')
-rw-r--r--net/mpls/af_mpls.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 55a30ee3d820..0458c8aa5c11 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -2017,6 +2017,7 @@ nla_put_failure:
static int mpls_dump_routes(struct sk_buff *skb, struct netlink_callback *cb)
{
+ const struct nlmsghdr *nlh = cb->nlh;
struct net *net = sock_net(skb->sk);
struct mpls_route __rcu **platform_label;
size_t platform_labels;
@@ -2024,6 +2025,13 @@ static int mpls_dump_routes(struct sk_buff *skb, struct netlink_callback *cb)
ASSERT_RTNL();
+ if (cb->strict_check) {
+ int err = ip_valid_fib_dump_req(nlh, cb->extack);
+
+ if (err < 0)
+ return err;
+ }
+
index = cb->args[0];
if (index < MPLS_LABEL_FIRST_UNRESERVED)
index = MPLS_LABEL_FIRST_UNRESERVED;