linux-kernel - Re: [PATCH 6/7] UBI: Fix memory leak in ubi_attach

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Date:	Mon, 30 Sep 2013 10:13:46 +0200
From:	Richard Genoud <richard.genoud@...il.com>
To:	Richard Weinberger <richard@....at>
Cc:	Artem Bityutskiy <dedekind1@...il.com>,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/7] UBI: Fix memory leak in ubi_attach_fastmap() error path

2013/9/28 Richard Weinberger <richard@....at>:
> On error we have to free all three temporary lists.
>
> Reported-by: Richard Genoud <richard.genoud@...il.com>
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
>  drivers/mtd/ubi/fastmap.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
> index 05067f5..4cfc8da 100644
> --- a/drivers/mtd/ubi/fastmap.c
> +++ b/drivers/mtd/ubi/fastmap.c
> @@ -841,6 +841,19 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
>  fail_bad:
>         ret = UBI_BAD_FASTMAP;
>  fail:
> +       list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list) {
> +               kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
> +               list_del(&tmp_aeb->u.list);
> +       }
> +       list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &eba_orphans, u.list) {
> +               kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
> +               list_del(&tmp_aeb->u.list);
> +       }
> +       list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) {
> +               kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
> +               list_del(&tmp_aeb->u.list);
> +       }
> +
>         return ret;
>  }
>
> --
> 1.8.3.1
>

Works like a charm !
Tested-by: Richard Genoud <richard.genoud@...il.com>


Thanks !
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