Merge branch 'stable-3.16' of git://git.infradead.org/users/pcmoore/selinux into next

2 files changed, 15 insertions, 3 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 9c6b972..59820f8 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -987,7 +987,10 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *	Retrieve the LSM-specific secid for the sock to enable caching of network
  *	authorizations.
  * @sock_graft:
- *	Sets the socket's isec sid to the sock's sid.
+ *	This hook is called in response to a newly created sock struct being
+ *	grafted onto an existing socket and allows the security module to
+ *	perform whatever security attribute management is necessary for both
+ *	the sock and socket.
  * @inet_conn_request:
  *	Sets the openreq's sid to socket's sid with MLS portion taken from peer sid.
  * @inet_csk_clone:
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 83d06db..a1ac1c5 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4499,9 +4499,18 @@ static void selinux_sock_graft(struct sock *sk, struct socket *parent)
 	struct inode_security_struct *isec = SOCK_INODE(parent)->i_security;
 	struct sk_security_struct *sksec = sk->sk_security;
 
-	if (sk->sk_family == PF_INET || sk->sk_family == PF_INET6 ||
-	    sk->sk_family == PF_UNIX)
+	switch (sk->sk_family) {
+	case PF_INET:
+	case PF_INET6:
+	case PF_UNIX:
 		isec->sid = sksec->sid;
+		break;
+	default:
+		/* by default there is no special labeling mechanism for the
+		 * sksec label so inherit the label from the parent socket */
+		BUG_ON(sksec->sid != SECINITSID_UNLABELED);
+		sksec->sid = isec->sid;
+	}
 	sksec->sclass = isec->sclass;
 }