selinux: simple cleanup for cond_read_node()

The node->cur_state and len can be read in a single call of next_entry().
And setting len before reading is a dead write so can be eliminated.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
(Minor tweak to the length parameter in the call to next_entry())
Signed-off-by: NPaul Moore <pmoore@redhat.com>

security/selinux/ss/conditional.c

@@ -402,19 +402,14 @@ static int cond_read_node(struct policydb *p, struct cond_node *node, void *fp)
 	int rc;
 	struct cond_expr *expr = NULL, *last = NULL;
 
-	rc = next_entry(buf, fp, sizeof(u32));
+	rc = next_entry(buf, fp, sizeof(u32) * 2);
 	if (rc)
 		return rc;
 
 	node->cur_state = le32_to_cpu(buf[0]);
 
-	len = 0;
-	rc = next_entry(buf, fp, sizeof(u32));
-	if (rc)
-		return rc;
-
 	/* expr */
-	len = le32_to_cpu(buf[0]);
+	len = le32_to_cpu(buf[1]);
 
 	for (i = 0; i < len; i++) {
 		rc = next_entry(buf, fp, sizeof(u32) * 2);