Re: [PATCH] perf hisi-ptt: Fix memory leak in lseek failure handling

[Namhyung Kim]

Hello,

On Sat, Sep 30, 2023 at 12:27 AM Kuan-Wei Chiu <visitorckw@xxxxxxxxx> wrote:
>
> In the previous code, there was a memory leak issue where the previously
> allocated memory was not freed upon a failed lseek operation. This patch
> addresses the problem by releasing the old memory before returning -errno
> in case of a lseek failure. This ensures that memory is properly managed
> and avoids potential memory leaks.
>
> Signed-off-by: Kuan-Wei Chiu <visitorckw@xxxxxxxxx>

Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>

Thanks,
Namhyung


> ---
>  tools/perf/util/hisi-ptt.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/hisi-ptt.c b/tools/perf/util/hisi-ptt.c
> index 45b614bb73bf..43bd1ca62d58 100644
> --- a/tools/perf/util/hisi-ptt.c
> +++ b/tools/perf/util/hisi-ptt.c
> @@ -108,8 +108,10 @@ static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
>                 data_offset = 0;
>         } else {
>                 data_offset = lseek(fd, 0, SEEK_CUR);
> -               if (data_offset == -1)
> +               if (data_offset == -1) {
> +                       free(data);
>                         return -errno;
> +               }
>         }
>
>         err = readn(fd, data, size);
> --
> 2.25.1
>