linux-kernel - Re: [PATCH -next] perf util: Fix memory leak in __parse

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Message-ID: <20200703103106.GA3261456@krava>
Date:   Fri, 3 Jul 2020 12:31:06 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Zheng Zengkai <zhengzengkai@...wei.com>
Cc:     acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, huawei.libin@...wei.com
Subject: Re: [PATCH -next] perf util: Fix memory leak in __parse_regs()

On Fri, Jul 03, 2020 at 05:33:44PM +0800, Zheng Zengkai wrote:
> when using perf record option '-I' or '--user-regs='
> along with argument '?' to list available register names,
> memory of variable 'os' allocated by strdup() needs to be released
> before __parse_regs() returns, otherwise memory leak will occur.
> 
> Fixes: bcc84ec65ad1 ("perf record: Add ability to name registers to record")
> Signed-off-by: Zheng Zengkai <zhengzengkai@...wei.com>

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

thanks,
jirka

> ---
>  tools/perf/util/parse-regs-options.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/parse-regs-options.c b/tools/perf/util/parse-regs-options.c
> index e687497b3aac..a4a100425b3a 100644
> --- a/tools/perf/util/parse-regs-options.c
> +++ b/tools/perf/util/parse-regs-options.c
> @@ -54,7 +54,7 @@ __parse_regs(const struct option *opt, const char *str, int unset, bool intr)
>  #endif
>  				fputc('\n', stderr);
>  				/* just printing available regs */
> -				return -1;
> +				goto error;
>  			}
>  #ifdef HAVE_PERF_REGS_SUPPORT
>  			for (r = sample_reg_masks; r->name; r++) {
> -- 
> 2.20.1
>