linux-kernel - Re: [PATCH] cpupower: fix potential memory leak

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Message-ID: <CAJFMrCH_sq9d6R_rN3MA2H7gFYUgMB+XqMfwtg_UpyLGRjPV9w@mail.gmail.com>
Date:	Sat, 12 Sep 2015 01:21:09 +0530
From:	Arjun Sreedharan <arjun024@...il.com>
To:	Thomas Renninger <trenn@...e.com>
Cc:	linux-pm@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpupower: fix potential memory leak

Ping !

On 22 August 2015 at 17:31, Arjun Sreedharan <arjun024@...il.com> wrote:
> Signed-off-by: Arjun Sreedharan <arjun024@...il.com>
> ---
>  tools/power/cpupower/bench/parse.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/tools/power/cpupower/bench/parse.c b/tools/power/cpupower/bench/parse.c
> index f503fb5..058a351 100644
> --- a/tools/power/cpupower/bench/parse.c
> +++ b/tools/power/cpupower/bench/parse.c
> @@ -65,7 +65,7 @@ FILE *prepare_output(const char *dirname)
>  {
>         FILE *output = NULL;
>         int len;
> -       char *filename;
> +       char *filename, *filename_tmp;
>         struct utsname sysdata;
>         DIR *dir;
>
> @@ -80,17 +80,19 @@ FILE *prepare_output(const char *dirname)
>         }
>
>         len = strlen(dirname) + 30;
> -       filename = malloc(sizeof(char) * len);
> +       filename = malloc(sizeof(*filename) * len);
>
>         if (uname(&sysdata) == 0) {
>                 len += strlen(sysdata.nodename) + strlen(sysdata.release);
> -               filename = realloc(filename, sizeof(char) * len);
> +               filename_tmp = realloc(filename, sizeof(*filename) * len);
>
> -               if (filename == NULL) {
> +               if (filename_tmp == NULL) {
> +                       free(filename);
>                         perror("realloc");
>                         return NULL;
>                 }
>
> +               filename = filename_tmp;
>                 snprintf(filename, len - 1, "%s/benchmark_%s_%s_%li.log",
>                         dirname, sysdata.nodename, sysdata.release, time(NULL));
>         } else {
> --
> 2.4.5
>



-- 
Arjun Sreedharan
arjunsreedharan.org
--
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