selinux: Fix regression for Xorg

Commit 6f5317e730505d5cbc851c435a2dfe3d5a21d343 introduced a bug in the
handling of userspace object classes that is causing breakage for Xorg
when XSELinux is enabled.  Fix the bug by changing map_class() to return
SECCLASS_NULL when the class cannot be mapped to a kernel object class.

Reported-by:  "Justin P. Mattock" <justinmattock@gmail.com>
Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 3e7544d2a07b..ea7c01f4a2bf 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -213,7 +213,7 @@ static u16 map_class(u16 pol_value)
                         return i;
         }
 
-        return pol_value;
+        return SECCLASS_NULL;
 }
 
 static void map_decision(u16 tclass, struct av_decision *avd,