1 files changed, 28 insertions, 21 deletions

diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index e64eca246f1a..051b14c88e2d 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -155,12 +155,15 @@ int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid)
         int rc;
         struct netlbl_lsm_secattr secattr;
 
+        if (!netlbl_enabled()) {
+                *sid = SECSID_NULL;
+                return 0;
+        }
+
         netlbl_secattr_init(&secattr);
         rc = netlbl_skbuff_getattr(skb, &secattr);
         if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
-                rc = security_netlbl_secattr_to_sid(&secattr,
-                                                    base_sid,
-                                                    sid);
+                rc = security_netlbl_secattr_to_sid(&secattr, base_sid, sid);
         else
                 *sid = SECSID_NULL;
         netlbl_secattr_destroy(&secattr);
@@ -198,7 +201,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
         if (netlbl_sock_getattr(sk, &secattr) == 0 &&
             secattr.flags != NETLBL_SECATTR_NONE &&
             security_netlbl_secattr_to_sid(&secattr,
-                                           SECINITSID_UNLABELED,
+                                           SECINITSID_NETMSG,
                                            &nlbl_peer_sid) == 0)
                 sksec->peer_sid = nlbl_peer_sid;
         netlbl_secattr_destroy(&secattr);
@@ -295,38 +298,42 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
                                 struct avc_audit_data *ad)
 {
         int rc;
-        u32 netlbl_sid;
-        u32 recv_perm;
+        u32 nlbl_sid;
+        u32 perm;
+        struct netlbl_lsm_secattr secattr;
+
+        if (!netlbl_enabled())
+                return 0;
 
-        rc = selinux_netlbl_skbuff_getsid(skb,
-                                          SECINITSID_UNLABELED,
-                                          &netlbl_sid);
+        netlbl_secattr_init(&secattr);
+        rc = netlbl_skbuff_getattr(skb, &secattr);
+        if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
+                rc = security_netlbl_secattr_to_sid(&secattr,
+                                                    SECINITSID_NETMSG,
+                                                    &nlbl_sid);
+        else
+                nlbl_sid = SECINITSID_UNLABELED;
+        netlbl_secattr_destroy(&secattr);
         if (rc != 0)
                 return rc;
 
-        if (netlbl_sid == SECSID_NULL)
-                return 0;
-
         switch (sksec->sclass) {
         case SECCLASS_UDP_SOCKET:
-                recv_perm = UDP_SOCKET__RECVFROM;
+                perm = UDP_SOCKET__RECVFROM;
                 break;
         case SECCLASS_TCP_SOCKET:
-                recv_perm = TCP_SOCKET__RECVFROM;
+                perm = TCP_SOCKET__RECVFROM;
                 break;
         default:
-                recv_perm = RAWIP_SOCKET__RECVFROM;
+                perm = RAWIP_SOCKET__RECVFROM;
         }
 
-        rc = avc_has_perm(sksec->sid,
-                          netlbl_sid,
-                          sksec->sclass,
-                          recv_perm,
-                          ad);
+        rc = avc_has_perm(sksec->sid, nlbl_sid, sksec->sclass, perm, ad);
         if (rc == 0)
                 return 0;
 
-        netlbl_skbuff_err(skb, rc);
+        if (nlbl_sid != SECINITSID_UNLABELED)
+                netlbl_skbuff_err(skb, rc);
         return rc;
 }