Re: [PATCH 2/2] perf evsel: Check for NULL before perf_evsel__is_bpf_output()

[Jiri Olsa <jolsa@redhat.com>]

On Mon, Jan 30, 2017 at 02:23:39PM +0900, Taeung Song wrote:
> If 'evsel' is NULL, in perf_evsel__is_bpf_output()
> NULL pointer error can happen so check it.
> 
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
> ---
>  tools/perf/util/evsel.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index 04e536a..b77da72 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -242,8 +242,10 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
>  {
>  	struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
>  
> -	if (evsel != NULL)
> -		perf_evsel__init(evsel, attr, idx);
> +	if (!evsel)
> +		return NULL;
> +
> +	perf_evsel__init(evsel, attr, idx);

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka