2 files changed, 15 insertions, 3 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 6478ce3252c7..794be735ff4b 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 336f0a04450e..b3a6754e932b 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;
 }