linux-kernel - Re: [PATCH] perf tests: dlfilter: free desc and long_desc in check_filter

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Date:   Fri, 20 Aug 2021 15:29:39 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Riccardo Mancini <rickyman7@...il.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tests: dlfilter: free desc and long_desc in
 check_filter_desc

On 20/08/21 2:31 pm, Riccardo Mancini wrote:
> In dlfilter-test, the function check_filter_desc calls get_filter_desc
> which allocates desc and long_desc.
> However, these variables are never deallocated.
> 
> This patch adds the missing frees.
> 
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> Fixes: 9f9c9a8de2d5e96c ("perf tests: Add dlfilter test")
> Signed-off-by: Riccardo Mancini <rickyman7@...il.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  tools/perf/tests/dlfilter-test.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/perf/tests/dlfilter-test.c b/tools/perf/tests/dlfilter-test.c
> index 7eba7955d53154e1..bc03b5df6828d6fa 100644
> --- a/tools/perf/tests/dlfilter-test.c
> +++ b/tools/perf/tests/dlfilter-test.c
> @@ -239,15 +239,20 @@ static int get_dlfilters_path(char *buf, size_t sz)
>  
>  static int check_filter_desc(struct test_data *td)
>  {
> -	char *long_desc;
> -	char *desc;
> +	char *long_desc = NULL;
> +	char *desc = NULL;
> +	int ret;
>  
>  	if (get_filter_desc(td->dlfilters, "dlfilter-test-api-v0.so", &desc, &long_desc) &&
>  	    long_desc && !strcmp(long_desc, "Filter used by the 'dlfilter C API' perf test") &&
>  	    desc && !strcmp(desc, "dlfilter to test v0 C API"))
> -		return 0;
> +		ret = 0;
> +	else
> +		ret = -1;
>  
> -	return -1;
> +	free(desc);
> +	free(long_desc);
> +	return ret;
>  }
>  
>  static int get_ip_addr(struct test_data *td)
>