Messages in this thread Patch in this message |  | | From | Jiri Olsa <> | Subject | [PATCH 08/10] perf values: Zero value buffers | Date | Thu, 24 Aug 2017 18:27:35 +0200 |
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We need to make sure the array of value pointers are zero initialized, because we use them in realloc later on and uninitialized non zero value will cause allocation error and aborted execution.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/values.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/values.c b/tools/perf/util/values.c index 2c4af02f08cd..3b56aeaa8cbb 100644 --- a/tools/perf/util/values.c +++ b/tools/perf/util/values.c @@ -12,7 +12,7 @@ int perf_read_values_init(struct perf_read_values *values) values->threads_max = 16; values->pid = malloc(values->threads_max * sizeof(*values->pid)); values->tid = malloc(values->threads_max * sizeof(*values->tid)); - values->value = malloc(values->threads_max * sizeof(*values->value)); + values->value = zalloc(values->threads_max * sizeof(*values->value)); if (!values->pid || !values->tid || !values->value) { pr_debug("failed to allocate read_values threads arrays"); goto out_free_pid; @@ -99,7 +99,8 @@ static int perf_read_values__findnew_thread(struct perf_read_values *values, } i = values->threads; - values->value[i] = malloc(values->counters_max * sizeof(**values->value)); + + values->value[i] = zalloc(values->counters_max * sizeof(**values->value)); if (!values->value[i]) { pr_debug("failed to allocate read_values counters array"); return -ENOMEM; @@ -130,12 +131,16 @@ static int perf_read_values__enlarge_counters(struct perf_read_values *values) for (i = 0; i < values->threads; i++) { u64 *value = realloc(values->value[i], counters_max * sizeof(**values->value)); + int j; if (!value) { pr_debug("failed to enlarge read_values ->values array"); goto out_free_name; } + for (j = values->counters_max; j < counters_max; j++) + value[j] = 0; + values->value[i] = value; } -- 2.9.5
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