Revert "selinux: fix the default socket labeling in sock_graft()"

This reverts commit 4da6daf4d3df5a977e4623963f141a627fd2efce.

Unfortunately, the commit in question caused problems with Bluetooth
devices, specifically it caused them to get caught in the newly
created BUG_ON() check.  The AF_ALG problem still exists, but will be
addressed in a future patch.

Cc: stable@vger.kernel.org
Signed-off-by: Paul Moore <pmoore@redhat.com>

2 files changed, 3 insertions, 15 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 794be735ff4b..6478ce3252c7 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -987,10 +987,7 @@ 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:
- *      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.
+ *      Sets the socket's isec sid to the sock's sid.
  * @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 b3a6754e932b..336f0a04450e 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4499,18 +4499,9 @@ 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;
 
-        switch (sk->sk_family) {
-        case PF_INET:
-        case PF_INET6:
-        case PF_UNIX:
+        if (sk->sk_family == PF_INET || sk->sk_family == PF_INET6 ||
+            sk->sk_family == 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;
 }