On 08/28/2018 03:31 AM, Anders Roxell wrote:
> The strncpy doesn't null terminate the string because the size is too
> short by one byte.
>
> parse.c: In function ‘prepare_default_config’:
> parse.c:148:2: warning: ‘strncpy’ output truncated before terminating
> nul copying 8 bytes from a string of the same length
> [-Wstringop-truncation]
> strncpy(config->governor, "ondemand", 8);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> The normal method of passing the length of the destination buffer works
> correctly here.
>
> Fixes: 7fe2f6399a84 ("cpupowerutils - cpufrequtils extended with quite some
> features")
> Signed-off-by: Anders Roxell <anders.rox...@linaro.org>
> ---
> tools/power/cpupower/bench/parse.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/power/cpupower/bench/parse.c
> b/tools/power/cpupower/bench/parse.c
> index 9ba8a44ad2a7..84caee38418f 100644
> --- a/tools/power/cpupower/bench/parse.c
> +++ b/tools/power/cpupower/bench/parse.c
> @@ -145,7 +145,7 @@ struct config *prepare_default_config()
> config->cpu = 0;
> config->prio = SCHED_HIGH;
> config->verbose = 0;
> - strncpy(config->governor, "ondemand", 8);
> + strncpy(config->governor, "ondemand", sizeof(config->governor));
>
> config->output = stdout;
>
>
Thanks. Applied to cpupower git for 4.19-rc3
thanks,
-- Shuah
