From: Jiri Olsa <jolsa@kernel.org>
Date: Sun, 1 Nov 2020 23:31:02 +0000 (+0100)
Subject: perf tools: Initialize output buffer in build_id__sprintf
X-Git-Tag: xarray-5.12~1042^2~3
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=6311951d4f8f28c43b554ff0719027884bedd7e3;p=users%2Fwilly%2Fxarray.git

perf tools: Initialize output buffer in build_id__sprintf

We display garbage for undefined build_id objects, because we don't
initialize the output buffer.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20201101233103.3537427-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 8763772f1095..6b410c3d52dc 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -102,6 +102,8 @@ int build_id__sprintf(const struct build_id *build_id, char *bf)
 	const u8 *raw = build_id->data;
 	size_t i;
 
+	bf[0] = 0x0;
+
 	for (i = 0; i < build_id->size; ++i) {
 		sprintf(bid, "%02x", *raw);
 		++raw;