linux-kernel - Re: [PATCH 1/4] perf metrictroup: Fix memory leak of metric

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Message-ID: <20200521155400.GA14034@kernel.org>
Date:   Thu, 21 May 2020 12:54:00 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Wei Li <liwei391@...wei.com>, Ian Rogers <irogers@...gle.com>
Cc:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org, Li Bin <huawei.libin@...wei.com>,
        Xie XiuQi <xiexiuqi@...wei.com>,
        Hongbo Yao <yaohongbo@...wei.com>
Subject: Re: [PATCH 1/4] perf metrictroup: Fix memory leak of metric_events

Em Thu, May 21, 2020 at 09:32:15PM +0800, Wei Li escreveu:
> From: Hongbo Yao <yaohongbo@...wei.com>
> 
> Fix memory leak of metric_events in function metricgroup__setup_events()

The leak is there but this code has changed a lot recently, please take
a look at my perf/core branch and keep Ian Rogers in the loop,

- Arnaldo
 
> Signed-off-by: Hongbo Yao <yaohongbo@...wei.com>
> ---
>  tools/perf/util/metricgroup.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> index 926449a7cdbf..69bf0f4d646e 100644
> --- a/tools/perf/util/metricgroup.c
> +++ b/tools/perf/util/metricgroup.c
> @@ -184,6 +184,7 @@ static int metricgroup__setup_events(struct list_head *groups,
>  		if (!evsel) {
>  			pr_debug("Cannot resolve %s: %s\n",
>  					eg->metric_name, eg->metric_expr);
> +			free(metric_events);
>  			continue;
>  		}
>  		for (i = 0; i < eg->idnum; i++)
> @@ -191,11 +192,13 @@ static int metricgroup__setup_events(struct list_head *groups,
>  		me = metricgroup__lookup(metric_events_list, evsel, true);
>  		if (!me) {
>  			ret = -ENOMEM;
> +			free(metric_events);
>  			break;
>  		}
>  		expr = malloc(sizeof(struct metric_expr));
>  		if (!expr) {
>  			ret = -ENOMEM;
> +			free(metric_events);
>  			break;
>  		}
>  		expr->metric_expr = eg->metric_expr;
> -- 
> 2.17.1
> 

-- 

- Arnaldo