[PATCH 1/2] perf tools: Initialize output buffer in build_id__sprintf

[Jiri Olsa]

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

Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 tools/perf/util/build-id.c | 2 ++
 1 file changed, 2 insertions(+)

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;
-- 
2.26.2