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perf build-id: Truncate to avoid overflowing the build_id data

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Warning when the build_id data would be overflowed would lead to
memory corruption, switch to truncation.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250724163302.596743-3-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2025-07-24 09:32:42 -07:00 committed by Namhyung Kim
parent f3982385bc
commit 5a2ceebd81
1 changed files with 4 additions and 1 deletions
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5
tools/perf/util/build-id.c
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@ -951,7 +951,10 @@ bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
void build_id__init(struct build_id *bid, const u8 *data, size_t size)
{
WARN_ON(size > BUILD_ID_SIZE);
if (size > BUILD_ID_SIZE) {
pr_debug("Truncating build_id size from %zd\n", size);
size = BUILD_ID_SIZE;
}
memcpy(bid->data, data, size);
bid->size = size;
}