Re: [PATCH v2 1/2] perf probe: Fix uninitialized variable

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Wed, Dec 11, 2024 at 08:55:23AM +0000, James Clark wrote:
> Since the linked fixes: commit, err is returned uninitialized due to the
> removal of "return 0". Initialize err to fix it.
> 
> This fixes the following intermittent test failure on release builds:
> 
>  $ perf test "testsuite_probe"
>  ...
>  -- [ FAIL ] -- perf_probe :: test_invalid_options :: mutually exclusive options :: -L foo -V bar (output regexp parsing)
>  Regexp not found: \"Error: switch .+ cannot be used with switch .+\"
>  ...

So Namhyung, this one should go to perf-tools, I can pick the second on
perf-tools-next, so that we keep perf-tools as small as possible.

- Arnaldo
 
> Fixes: 080e47b2a237 ("perf probe: Introduce quotation marks support")
> Tested-by: Namhyung Kim <namhyung@kernel.org>
> Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
> Signed-off-by: James Clark <james.clark@linaro.org>
> ---
>  tools/perf/util/probe-event.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index 6d51a4c98ad7..eaa0318e9b87 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -1370,7 +1370,7 @@ int parse_line_range_desc(const char *arg, struct line_range *lr)
>  {
>  	char *buf = strdup(arg);
>  	char *p;
> -	int err;
> +	int err = 0;
>  
>  	if (!buf)
>  		return -ENOMEM;
> -- 
> 2.34.1