Re: [PATCH v2 1/2] perf parse-events: fix memory leaks found on parse_events

[Jiri Olsa <jolsa@redhat.com>]

On Wed, Mar 18, 2020 at 07:31:00PM -0700, Ian Rogers wrote:
> Memory leaks found by applying LLVM's libfuzzer on the parse_events
> function.
> 
> Signed-off-by: Ian Rogers <irogers@google.com>

Acked-by: Jiri Olsa <jolsa@redhat.com>

thanks,
jirka

> ---
>  tools/perf/util/parse-events.c | 2 ++
>  tools/perf/util/parse-events.y | 3 ++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 593b6b03785d..1e0bec5c0846 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -1482,6 +1482,8 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
>  
>  		list_for_each_entry_safe(pos, tmp, &config_terms, list) {
>  			list_del_init(&pos->list);
> +			if (pos->free_str)
> +				free(pos->val.str);
>  			free(pos);
>  		}
>  		return -EINVAL;
> diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> index 94f8bcd83582..8212cc771667 100644
> --- a/tools/perf/util/parse-events.y
> +++ b/tools/perf/util/parse-events.y
> @@ -44,7 +44,7 @@ static void free_list_evsel(struct list_head* list_evsel)
>  
>  	list_for_each_entry_safe(evsel, tmp, list_evsel, core.node) {
>  		list_del_init(&evsel->core.node);
> -		perf_evsel__delete(evsel);
> +		evsel__delete(evsel);
>  	}
>  	free(list_evsel);
>  }
> @@ -326,6 +326,7 @@ PE_NAME opt_pmu_config
>  	}
>  	parse_events_terms__delete($2);
>  	parse_events_terms__delete(orig_terms);
> +	free(pattern);
>  	free($1);
>  	$$ = list;
>  #undef CLEANUP_YYABORT
> -- 
> 2.25.1.696.g5e7596f4ac-goog
>