[MLSXFRM]: Default labeling of socket specific IPSec policies

This defaults the label of socket-specific IPSec policies to be the
same as the socket they are set on.

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

1 files changed, 11 insertions, 4 deletions

diff --git a/net/key/af_key.c b/net/key/af_key.c
index a065e1a677..797c744a84 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -2843,14 +2843,14 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
 }
 
-static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
+static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
                                                 u8 *data, int len, int *dir)
 {
         struct xfrm_policy *xp;
         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
         struct sadb_x_sec_ctx *sec_ctx;
 
-        switch (family) {
+        switch (sk->sk_family) {
         case AF_INET:
                 if (opt != IP_IPSEC_POLICY) {
                         *dir = -EOPNOTSUPP;
@@ -2891,7 +2891,7 @@ static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
         xp->lft.hard_byte_limit = XFRM_INF;
         xp->lft.soft_packet_limit = XFRM_INF;
         xp->lft.hard_packet_limit = XFRM_INF;
-        xp->family = family;
+        xp->family = sk->sk_family;
 
         xp->xfrm_nr = 0;
         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
@@ -2907,8 +2907,10 @@ static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
                 p += pol->sadb_x_policy_len*8;
                 sec_ctx = (struct sadb_x_sec_ctx *)p;
                 if (len < pol->sadb_x_policy_len*8 +
-                    sec_ctx->sadb_x_sec_len)
+                    sec_ctx->sadb_x_sec_len) {
+                        *dir = -EINVAL;
                         goto out;
+                }
                 if ((*dir = verify_sec_ctx_len(p)))
                         goto out;
                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
@@ -2918,6 +2920,11 @@ static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
                 if (*dir)
                         goto out;
         }
+        else {
+                *dir = security_xfrm_sock_policy_alloc(xp, sk);
+                if (*dir)
+                        goto out;
+        }
 
         *dir = pol->sadb_x_policy_dir-1;
         return xp;