Re: [PATCH v1 1/3] lib subcmd: Fix memory leak in uniq

[Ian Rogers <irogers@google.com>]

On Thu, Dec 7, 2023 at 4:05 PM Ian Rogers <irogers@google.com> wrote:
>
> uniq will write one command name over another causing the overwritten
> string to be leaked. Fix by doing a pass that removes duplicates and a
> second that removes the holes.
>
> Signed-off-by: Ian Rogers <irogers@google.com>

Ping for this series, no comments since sent.

Thanks,
Ian

> ---
>  tools/lib/subcmd/help.c | 18 ++++++++++++++----
>  1 file changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
> index adfbae27dc36..8561b0f01a24 100644
> --- a/tools/lib/subcmd/help.c
> +++ b/tools/lib/subcmd/help.c
> @@ -52,11 +52,21 @@ void uniq(struct cmdnames *cmds)
>         if (!cmds->cnt)
>                 return;
>
> -       for (i = j = 1; i < cmds->cnt; i++)
> -               if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
> -                       cmds->names[j++] = cmds->names[i];
> -
> +       for (i = 1; i < cmds->cnt; i++) {
> +               if (!strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
> +                       zfree(&cmds->names[i - 1]);
> +       }
> +       for (i = 0, j = 0; i < cmds->cnt; i++) {
> +               if (cmds->names[i]) {
> +                       if (i == j)
> +                               j++;
> +                       else
> +                               cmds->names[j++] = cmds->names[i];
> +               }
> +       }
>         cmds->cnt = j;
> +       while (j < i)
> +               cmds->names[j++] = NULL;
>  }
>
>  void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
> --
> 2.43.0.472.g3155946c3a-goog
>