diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 67f986c..20aef90 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -147,20 +147,17 @@
 char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf,
 				    size_t size)
 {
-	bool is_alloc = !!bf;
 	bool retry_old = true;
 
-	asnprintf(&bf, size, "%s/%s/%s/kallsyms",
-		  buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
+	snprintf(bf, size, "%s/%s/%s/kallsyms",
+		 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
 retry:
 	if (!access(bf, F_OK))
 		return bf;
-	if (is_alloc)
-		free(bf);
 	if (retry_old) {
 		/* Try old style kallsyms cache */
-		asnprintf(&bf, size, "%s/%s/%s",
-			  buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
+		snprintf(bf, size, "%s/%s/%s",
+			 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
 		retry_old = false;
 		goto retry;
 	}