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-rw-r--r--tools/perf/util/synthetic-events.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 3ab6a92b1a6d..9ab9308ee80c 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -2219,8 +2219,8 @@ int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16
len = pos->long_name_len + 1;
len = PERF_ALIGN(len, NAME_ALIGN);
- memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
- ev.build_id.size = pos->bid.size;
+ ev.build_id.size = min(pos->bid.size, sizeof(pos->bid.data));
+ memcpy(&ev.build_id.build_id, pos->bid.data, ev.build_id.size);
ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
ev.build_id.header.misc = misc | PERF_RECORD_MISC_BUILD_ID_SIZE;
ev.build_id.pid = machine->pid;