NetLabel: use SECINITSID_UNLABELED for a base SID

This patch changes NetLabel to use SECINITSID_UNLABLELED as it's source of
SELinux type information when generating a NetLabel context.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 9 insertions, 20 deletions

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index bb2d2bc869ba..18274b005090 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2336,7 +2336,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
                         selinux_netlbl_cache_add(skb, &ctx_new);
                 ebitmap_destroy(&ctx_new.range.level[0].cat);
         } else {
-                *sid = SECINITSID_UNLABELED;
+                *sid = SECSID_NULL;
                 rc = 0;
         }
 
@@ -2519,7 +2519,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
         if (netlbl_sock_getattr(sk, &secattr) == 0 &&
             selinux_netlbl_secattr_to_sid(NULL,
                                           &secattr,
-                                          sksec->sid,
+                                          SECINITSID_UNLABELED,
                                           &nlbl_peer_sid) == 0)
                 sksec->peer_sid = nlbl_peer_sid;
         netlbl_secattr_destroy(&secattr);
@@ -2552,9 +2552,6 @@ u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid)
         if (rc != 0)
                 return SECSID_NULL;
 
-        if (peer_sid == SECINITSID_UNLABELED)
-                return SECSID_NULL;
-
         return peer_sid;
 }
 
@@ -2616,11 +2613,13 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
         u32 netlbl_sid;
         u32 recv_perm;
 
-        rc = selinux_netlbl_skbuff_getsid(skb, SECINITSID_NETMSG, &netlbl_sid);
+        rc = selinux_netlbl_skbuff_getsid(skb,
+                                          SECINITSID_UNLABELED,
+                                          &netlbl_sid);
         if (rc != 0)
                 return rc;
 
-        if (netlbl_sid == SECINITSID_UNLABELED)
+        if (netlbl_sid == SECSID_NULL)
                 return 0;
 
         switch (sksec->sclass) {
@@ -2658,10 +2657,6 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
 u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
 {
         struct sk_security_struct *sksec = sock->sk->sk_security;
-
-        if (sksec->peer_sid == SECINITSID_UNLABELED)
-                return SECSID_NULL;
-
         return sksec->peer_sid;
 }
 
@@ -2677,16 +2672,10 @@ u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
 u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
 {
         int peer_sid;
-        struct sock *sk = skb->sk;
-        struct inode_security_struct *isec;
 
-        if (sk == NULL || sk->sk_socket == NULL)
-                return SECSID_NULL;
-
-        isec = SOCK_INODE(sk->sk_socket)->i_security;
-        if (selinux_netlbl_skbuff_getsid(skb, isec->sid, &peer_sid) != 0)
-                return SECSID_NULL;
-        if (peer_sid == SECINITSID_UNLABELED)
+        if (selinux_netlbl_skbuff_getsid(skb,
+                                         SECINITSID_UNLABELED,
+                                         &peer_sid) != 0)
                 return SECSID_NULL;
 
         return peer_sid;