[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>

2 files changed, 12 insertions, 3 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index be02bd981d12..1c796087ee78 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1026,7 +1026,7 @@ int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen
         err = -EINVAL;
         read_lock(&xfrm_km_lock);
         list_for_each_entry(km, &xfrm_km_list, list) {
-                pol = km->compile_policy(sk->sk_family, optname, data,
+                pol = km->compile_policy(sk, optname, data,
                                          optlen, &err);
                 if (err >= 0)
                         break;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index dac8db1088bc..f70e158874d2 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1757,7 +1757,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
 /* User gives us xfrm_user_policy_info followed by an array of 0
  * or more templates.
  */
-static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt,
+static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
                                                u8 *data, int len, int *dir)
 {
         struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
@@ -1765,7 +1765,7 @@ static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt,
         struct xfrm_policy *xp;
         int nr;
 
-        switch (family) {
+        switch (sk->sk_family) {
         case AF_INET:
                 if (opt != IP_XFRM_POLICY) {
                         *dir = -EOPNOTSUPP;
@@ -1807,6 +1807,15 @@ static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt,
         copy_from_user_policy(xp, p);
         copy_templates(xp, ut, nr);
 
+        if (!xp->security) {
+                int err = security_xfrm_sock_policy_alloc(xp, sk);
+                if (err) {
+                        kfree(xp);
+                        *dir = err;
+                        return NULL;
+                }
+        }
+
         *dir = p->dir;
 
         return xp;