Re: [PATCH v5 2/4] zram: reject zero-size dictionary

[haoqin huang]

On Tue, Aug 4, 2026 at 1:32 PM Sergey Senozhatsky
<senozhatsky@xxxxxxxxxxxx> wrote:
>
> On (26/08/03 22:12), Haoqin Huang wrote:
> [..]
> > @@ -1700,8 +1700,12 @@ static int comp_params_store(struct zram *zram, u32 prio, s32 level,
> >                                               INT_MAX,
> >                                               NULL,
> >                                               READING_POLICY);
> > -             if (sz < 0)
> > +             if (sz <= 0) {
> > +                     pr_err("failed to load dictionary %s (err=%zd)\n",
> > +                            dict_path, sz);
>
> So for empty file this will read
>
>         "failed to load dictionary foo-bar (err=0)"
>
> which might be confusing.  I wonder if we want to separate these two:
>
>         if (sz < 0) {
>                 pr_err("failed to load dictionary %s (err=%zd)\n",
>                        dict_path, sz);
>                 return sz;
>         }
>         if (sz == 0) {
>                 pr_err("failed to load dictionary %s (empty file)\n",
>                        dict_path);
>                 return -EINVAL;
>         }

Good idea, much clearer. I will split them in v6. Thanks.