selinux: Remove redundant assignments

Get rid of redundant assignments which end up in values not being
read either because they are overwritten or the function ends.

Reported by clang-tidy [deadcode.DeadStores]
Signed-off-by: Michal Orzel <michalorzel.eng@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/avc.c

@@ -1059,7 +1059,7 @@ int avc_has_extended_perms(struct selinux_state *state,
 
 	node = avc_lookup(state->avc, ssid, tsid, tclass);
 	if (unlikely(!node)) {
-		node = avc_compute_av(state, ssid, tsid, tclass, &avd, xp_node);
+		avc_compute_av(state, ssid, tsid, tclass, &avd, xp_node);
 	} else {
 		memcpy(&avd, &node->ae.avd, sizeof(avd));
 		xp_node = node->ae.xp_node;
@@ -1151,7 +1151,7 @@ inline int avc_has_perm_noaudit(struct selinux_state *state,
 
 	node = avc_lookup(state->avc, ssid, tsid, tclass);
 	if (unlikely(!node))
-		node = avc_compute_av(state, ssid, tsid, tclass, avd, &xp_node);
+		avc_compute_av(state, ssid, tsid, tclass, avd, &xp_node);
 	else
 		memcpy(avd, &node->ae.avd, sizeof(*avd));
 

security/selinux/hooks.c

@@ -6487,7 +6487,6 @@ static int selinux_setprocattr(const char *name, void *value, size_t size)
 			goto abort_change;
 
 		/* Only allow single threaded processes to change context */
-		error = -EPERM;
 		if (!current_is_single_threaded()) {
 			error = security_bounded_transition(&selinux_state,
 							    tsec->sid, sid);

security/selinux/ss/services.c

@@ -2980,7 +2980,6 @@ int security_fs_use(struct selinux_state *state, struct super_block *sb)
 	}
 
 retry:
-	rc = 0;
 	rcu_read_lock();
 	policy = rcu_dereference(state->policy);
 	policydb = &policy->policydb;