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-rw-r--r--security/selinux/ss/services.c70
1 files changed, 22 insertions, 48 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 89df64672b89..082b20c78363 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -543,7 +543,7 @@ static void type_attribute_bounds_av(struct context *scontext,
struct av_decision *avd)
{
struct context lo_scontext;
- struct context lo_tcontext;
+ struct context lo_tcontext, *tcontextp = tcontext;
struct av_decision lo_avd;
struct type_datum *source;
struct type_datum *target;
@@ -553,67 +553,41 @@ static void type_attribute_bounds_av(struct context *scontext,
scontext->type - 1);
BUG_ON(!source);
+ if (!source->bounds)
+ return;
+
target = flex_array_get_ptr(policydb.type_val_to_struct_array,
tcontext->type - 1);
BUG_ON(!target);
- if (source->bounds) {
- memset(&lo_avd, 0, sizeof(lo_avd));
-
- memcpy(&lo_scontext, scontext, sizeof(lo_scontext));
- lo_scontext.type = source->bounds;
+ memset(&lo_avd, 0, sizeof(lo_avd));
- context_struct_compute_av(&lo_scontext,
- tcontext,
- tclass,
- &lo_avd,
- NULL);
- if ((lo_avd.allowed & avd->allowed) == avd->allowed)
- return; /* no masked permission */
- masked = ~lo_avd.allowed & avd->allowed;
- }
+ memcpy(&lo_scontext, scontext, sizeof(lo_scontext));
+ lo_scontext.type = source->bounds;
if (target->bounds) {
- memset(&lo_avd, 0, sizeof(lo_avd));
-
memcpy(&lo_tcontext, tcontext, sizeof(lo_tcontext));
lo_tcontext.type = target->bounds;
-
- context_struct_compute_av(scontext,
- &lo_tcontext,
- tclass,
- &lo_avd,
- NULL);
- if ((lo_avd.allowed & avd->allowed) == avd->allowed)
- return; /* no masked permission */
- masked = ~lo_avd.allowed & avd->allowed;
+ tcontextp = &lo_tcontext;
}
- if (source->bounds && target->bounds) {
- memset(&lo_avd, 0, sizeof(lo_avd));
- /*
- * lo_scontext and lo_tcontext are already
- * set up.
- */
+ context_struct_compute_av(&lo_scontext,
+ tcontextp,
+ tclass,
+ &lo_avd,
+ NULL);
- context_struct_compute_av(&lo_scontext,
- &lo_tcontext,
- tclass,
- &lo_avd,
- NULL);
- if ((lo_avd.allowed & avd->allowed) == avd->allowed)
- return; /* no masked permission */
- masked = ~lo_avd.allowed & avd->allowed;
- }
+ masked = ~lo_avd.allowed & avd->allowed;
- if (masked) {
- /* mask violated permissions */
- avd->allowed &= ~masked;
+ if (likely(!masked))
+ return; /* no masked permission */
- /* audit masked permissions */
- security_dump_masked_av(scontext, tcontext,
- tclass, masked, "bounds");
- }
+ /* mask violated permissions */
+ avd->allowed &= ~masked;
+
+ /* audit masked permissions */
+ security_dump_masked_av(scontext, tcontext,
+ tclass, masked, "bounds");
}
/*