[PATCH v1 01/15] perf list: Avoid potential out of bounds memory read
Ian Rogers
irogers at google.com
Fri Sep 6 22:08:16 PDT 2024
If a desc string is 0 length then -1 will be out of bounds, add a
check.
Signed-off-by: Ian Rogers <irogers at google.com>
---
tools/perf/builtin-list.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 82cb4b1010aa..65b8cba324be 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -173,7 +173,7 @@ static void default_print_event(void *ps, const char *pmu_name, const char *topi
if (pmu_name && strcmp(pmu_name, "default_core")) {
desc_len = strlen(desc);
desc_len = asprintf(&desc_with_unit,
- desc[desc_len - 1] != '.'
+ desc_len > 0 && desc[desc_len - 1] != '.'
? "%s. Unit: %s" : "%s Unit: %s",
desc, pmu_name);
}
--
2.46.0.469.g59c65b2a67-goog
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