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| author | Ian Rogers <irogers@google.com> | 2025-07-24 09:32:42 -0700 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2025-07-24 13:50:17 -0700 |
| commit | 5a2ceebd8175874ae0e91a304ad6600d82806973 (patch) | |
| tree | c14b1773a389496d95238ee8e339f7a4f7f7f165 | |
| parent | perf build-id: Reduce size of "size" variable (diff) | |
| download | linux-5a2ceebd8175874ae0e91a304ad6600d82806973.tar.gz linux-5a2ceebd8175874ae0e91a304ad6600d82806973.zip | |
perf build-id: Truncate to avoid overflowing the build_id data
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>
| -rw-r--r-- | tools/perf/util/build-id.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index e763e8d99a43..5bc2040bdd0d 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -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; } |