Re: [PATCH v4 00/12] pstore: mtd: support crash log to block and mtd device

[Kees Cook]

On Sat, May 09, 2020 at 06:32:28PM +0800, WeiXiong Liao wrote:
> The following diff is to fix "rmmod" bug.
> 
> @@ -1273,8 +1273,8 @@ static void psz_free_zones(struct pstore_zone
> ***pszones, unsigned int *cnt)
>                 return;
> 
>         while (*cnt > 0) {
> -               psz_free_zone(&zones[*cnt]);
>                 (*cnt)--;
> +               psz_free_zone(&zones[*cnt]);
>         }
>         kfree(zones);
>         *pszones = NULL;

Ah-ha! Thanks; I'd almost found that. I got confused because I wasn't
see NULL free()s, and I finally noticed that the zones had left over
ERR_PTRs:

        if (IS_ERR(cxt->fpszs)) {
                err = PTR_ERR(cxt->fpszs);
+               cxt->fpszs = NULL;
                goto free_out;
        }

I'll fix those and your v5 and my lastest tree merged.

-- 
Kees Cook