linux-kernel - Re: [PATCH v2 9/9] tools/power/x86/intel-speed-select: Fix memory leak

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Date:   Thu, 05 Sep 2019 12:42:05 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Prarit Bhargava <prarit@...hat.com>,
        platform-driver-x86@...r.kernel.org
Cc:     andriy.shevchenko@...el.com, David Arcari <darcari@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 9/9] tools/power/x86/intel-speed-select: Fix memory
 leak

On Thu, 2019-09-05 at 08:03 -0400, Prarit Bhargava wrote:
> cpumasks are allocated by calling the alloc_cpu_mask() function and
> are
> never free'd.  They should be free'd after the commands have run.
> 
> Fix the memory leaks by calling free_cpu_set().
Good to fix this. But after one command execution the process will
exit.

Thanks,
Srinivas

> 
> Signed-off-by: Prarit Bhargava <prarit@...hat.com>
> Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
> Cc: David Arcari <darcari@...hat.com>
> Cc: linux-kernel@...r.kernel.org
> ---
>  tools/power/x86/intel-speed-select/isst-config.c | 16 +++++++++++---
> --
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/power/x86/intel-speed-select/isst-config.c
> b/tools/power/x86/intel-speed-select/isst-config.c
> index 78f0cebda1da..59753b3917bb 100644
> --- a/tools/power/x86/intel-speed-select/isst-config.c
> +++ b/tools/power/x86/intel-speed-select/isst-config.c
> @@ -603,6 +603,10 @@ static int isst_fill_platform_info(void)
>  
>  	close(fd);
>  
> +	if (isst_platform_info.api_version > supported_api_ver) {
> +		printf("Incompatible API versions; Upgrade of tool is
> required\n");
> +		return -1;
> +	}
>  	return 0;
>  }
>  
> @@ -1528,6 +1532,7 @@ static void cmdline(int argc, char **argv)
>  {
>  	int opt;
>  	int option_index = 0;
> +	int ret;
>  
>  	static struct option long_options[] = {
>  		{ "cpu", required_argument, 0, 'c' },
> @@ -1589,13 +1594,14 @@ static void cmdline(int argc, char **argv)
>  	set_max_cpu_num();
>  	set_cpu_present_cpu_mask();
>  	set_cpu_target_cpu_mask();
> -	isst_fill_platform_info();
> -	if (isst_platform_info.api_version > supported_api_ver) {
> -		printf("Incompatible API versions; Upgrade of tool is
> required\n");
> -		exit(0);
> -	}
> +	ret = isst_fill_platform_info();
> +	if (ret)
> +		goto out;
>  
>  	process_command(argc, argv);
> +out:
> +	free_cpu_set(present_cpumask);
> +	free_cpu_set(target_cpumask);
>  }
>  
>  int main(int argc, char **argv)