[MLSXFRM]: Auto-labeling of child sockets

This automatically labels the TCP, Unix stream, and dccp child sockets
as well as openreqs to be at the same MLS level as the peer. This will
result in the selection of appropriately labeled IPSec Security
Associations.

This also uses the sock's sid (as opposed to the isec sid) in SELinux
enforcement of secmark in rcv_skb and postroute_last hooks.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 772b4eac78bc..07204391d083 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -327,7 +327,7 @@ struct dst_entry* inet_csk_route_req(struct sock *sk,
                                        { .sport = inet_sk(sk)->sport,
                                          .dport = ireq->rmt_port } } };
 
-        security_sk_classify_flow(sk, &fl);
+        security_req_classify_flow(req, &fl);
         if (ip_route_output_flow(&rt, &fl, sk, 0)) {
                 IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
                 return NULL;
@@ -510,6 +510,8 @@ struct sock *inet_csk_clone(struct sock *sk, const struct request_sock *req,
 
                 /* Deinitialize accept_queue to trap illegal accesses. */
                 memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue));
+
+                security_inet_csk_clone(newsk, req);
         }
         return newsk;
 }