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-rw-r--r--security/selinux/ss/services.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 78bb8100b02e..6a22eaebf3b7 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1363,6 +1363,15 @@ static void filename_compute_type(struct policydb *p, struct context *newcontext
const char *objname)
{
struct filename_trans *ft;
+
+ /*
+ * Most filename trans rules are going to live in specific directories
+ * like /dev or /var/run. This bitmap will quickly skip rule searches
+ * if the ttype does not contain any rules.
+ */
+ if (!ebitmap_get_bit(&p->filename_trans_ttypes, ttype))
+ return;
+
for (ft = p->filename_trans; ft; ft = ft->next) {
if (ft->stype == stype &&
ft->ttype == ttype &&