linux-kernel - Re: [PATCH] tracing: prefer strlcpy to strncpy

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Message-ID: <20180604140652.34f28df7@gandalf.local.home>
Date:   Mon, 4 Jun 2018 14:06:52 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Nick Desaulniers <nick.desaulniers@...il.com>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org, trivial@...nel.org
Subject: Re: [PATCH] tracing: prefer strlcpy to strncpy

On Mon, 28 May 2018 23:03:38 -0700
Nick Desaulniers <nick.desaulniers@...il.com> wrote:

> Fixes a stringop-truncation warning from gcc-8.
> 
> Signed-off-by: Nick Desaulniers <nick.desaulniers@...il.com>

Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

-- Steve

> ---
>  kernel/trace/trace_events_hist.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
> index b9061ed..b53a6c0 100644
> --- a/kernel/trace/trace_events_hist.c
> +++ b/kernel/trace/trace_events_hist.c
> @@ -393,7 +393,7 @@ static void hist_err_event(char *str, char *system, char *event, char *var)
>  	else if (system)
>  		snprintf(err, MAX_FILTER_STR_VAL, "%s.%s", system, event);
>  	else
> -		strncpy(err, var, MAX_FILTER_STR_VAL);
> +		strlcpy(err, var, MAX_FILTER_STR_VAL);
>  
>  	hist_err(str, err);
>  }