linux-kernel - Re: [PATCH 13/18] drm/edid: Use kmemdup instead of kmalloc + memcpy

Open Source and information security mailing list archives

Date:	Tue, 27 May 2014 11:14:57 -0400
From:	Alex Deucher <alexdeucher@...il.com>
To:	Benoit Taine <benoit.taine@...6.fr>
Cc:	David Airlie <airlied@...ux.ie>, kernel-janitors@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Maling list - DRI developers 
	<dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH 13/18] drm/edid: Use kmemdup instead of kmalloc + memcpy

On Mon, May 26, 2014 at 11:21 AM, Benoit Taine <benoit.taine@...6.fr> wrote:
> This issue was reported by coccicheck using the semantic patch
> at scripts/coccinelle/api/memdup.cocci
>
> Signed-off-by: Benoit Taine <benoit.taine@...6.fr>
> ---
> Tested by compilation without errors.

Reviewed-by: Alex Deucher <alexander.deucher@....com>

>
>  drivers/gpu/drm/drm_edid.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 7a4fd2e..d74239f 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3228,10 +3228,9 @@ int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb)
>
>                         /* Speaker Allocation Data Block */
>                         if (dbl == 3) {
> -                               *sadb = kmalloc(dbl, GFP_KERNEL);
> +                               *sadb = kmemdup(&db[1], dbl, GFP_KERNEL);
>                                 if (!*sadb)
>                                         return -ENOMEM;
> -                               memcpy(*sadb, &db[1], dbl);
>                                 count = dbl;
>                                 break;
>                         }
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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