lkml.org 
[lkml]   [2021]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] cpuidle_set accepts alpha numeric values for idle-set operation
From
Date
On 1/5/21 5:24 AM, Brahadambal Srinivasan wrote:
> For both the d and e options in cpuidle_set, an atoi() conversion is
> done without checking if the input argument is all numeric. So, an
> atoi conversion is done on any character provided as input and the
> CPU idle_set operation continues with that integer value, which may
> not be what is intended or entirely correct.
>
> A similar check is present for cpufreq-set already.
>
> This patch adds a check to see that the idle_set value is all numeric
> before doing a string-to-int conversion.
>
> Signed-off-by: Brahadambal Srinivasan <latha@linux.vnet.ibm.com>
> ---
> tools/power/cpupower/utils/cpuidle-set.c | 39 +++++++++++++++++++++---
> 1 file changed, 34 insertions(+), 5 deletions(-)
>
> diff --git a/tools/power/cpupower/utils/cpuidle-set.c b/tools/power/cpupower/utils/cpuidle-set.c
> index 46158928f9ad..b3dec48e7141 100644
> --- a/tools/power/cpupower/utils/cpuidle-set.c
> +++ b/tools/power/cpupower/utils/cpuidle-set.c
> @@ -21,6 +21,19 @@ static struct option info_opts[] = {
> { },
> };
>
> +int is_number(char *arg)
> +{
> + size_t len, i = 0;
> +
> + len = strlen(arg);
> +
> + for (i = 0; i < len; i++) {
> + if (!isdigit(arg[i]))
> + return 0;
> + }
> +
> + return 1;
> +}
>

Any reason why you can't use isdigit()? Please see isdigit()
usages examples in other tools and cpupower itself.

thanks,
-- Shuah

thanks,
-- Shuah

\
 
 \ /
  Last update: 2021-01-05 19:06    [W:0.058 / U:0.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site