From: maxime.ripard@bootlin.com (Maxime Ripard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if NULL
Date: Mon, 8 Oct 2018 11:21:11 +0200 [thread overview]
Message-ID: <20181008092111.qcufr4o7cy3nnj4b@flea> (raw)
In-Reply-To: <20181005215951.99003-2-giulio.benetti@micronovasrl.com>
On Fri, Oct 05, 2018 at 11:59:51PM +0200, Giulio Benetti wrote:
> If tcon->panel pointer is NULL, trying to dereference from it
> (i.e. tcon->panel->connector) will cause a null pointer dereference.
>
> Add tcon->panel null pointer check before calling
> sun4i_tcon0_mode_set_dithering().
>
> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
> Fixes: f11adcecbd5f ("drm/sun4i: tcon: Add dithering support for
> RGB565/RGB666 LCD panels")
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Applied both, thanks!
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Giulio Benetti <giulio.benetti@micronovasrl.com>
Cc: David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org>,
dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if NULL
Date: Mon, 8 Oct 2018 11:21:11 +0200 [thread overview]
Message-ID: <20181008092111.qcufr4o7cy3nnj4b@flea> (raw)
In-Reply-To: <20181005215951.99003-2-giulio.benetti@micronovasrl.com>
[-- Attachment #1: Type: text/plain, Size: 656 bytes --]
On Fri, Oct 05, 2018 at 11:59:51PM +0200, Giulio Benetti wrote:
> If tcon->panel pointer is NULL, trying to dereference from it
> (i.e. tcon->panel->connector) will cause a null pointer dereference.
>
> Add tcon->panel null pointer check before calling
> sun4i_tcon0_mode_set_dithering().
>
> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
> Fixes: f11adcecbd5f ("drm/sun4i: tcon: Add dithering support for
> RGB565/RGB666 LCD panels")
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Applied both, thanks!
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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next prev parent reply other threads:[~2018-10-08 9:21 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 9:36 [bug report] drm/sun4i: Handle DRM_BUS_FLAG_PIXDATA_*EDGE checking if panel is used Dan Carpenter
2018-10-02 13:26 ` Giulio Benetti
2018-10-02 14:12 ` Giulio Benetti
2018-10-02 20:40 ` Giulio Benetti
2018-10-11 7:16 ` Dan Carpenter
2018-10-11 21:36 ` Giulio Benetti
2018-10-02 20:48 ` [PATCH 1/2] drm/sun4i: tcon: fix check of tcon->panel null pointer Giulio Benetti
2018-10-02 20:48 ` Giulio Benetti
2018-10-02 20:49 ` [PATCH 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if null Giulio Benetti
2018-10-02 20:49 ` Giulio Benetti
2018-10-02 21:59 ` [PATCH 1/2] drm/sun4i: tcon: fix check of tcon->panel null pointer Giulio Benetti
2018-10-02 21:59 ` Giulio Benetti
2018-10-02 21:59 ` Giulio Benetti
2018-10-02 21:59 ` [PATCH 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if null Giulio Benetti
2018-10-02 21:59 ` Giulio Benetti
2018-10-03 7:34 ` Chen-Yu Tsai
2018-10-03 7:34 ` Chen-Yu Tsai
2018-10-02 22:00 ` [PATCH 1/2] drm/sun4i: tcon: fix check of tcon->panel null pointer Giulio Benetti
2018-10-02 22:00 ` Giulio Benetti
2018-10-02 22:00 ` Giulio Benetti
2018-10-03 9:43 ` Chen-Yu Tsai
2018-10-03 9:43 ` Chen-Yu Tsai
2018-10-03 12:13 ` Giulio Benetti
2018-10-03 12:13 ` Giulio Benetti
2018-10-03 14:24 ` [PATCH v2 " Giulio Benetti
2018-10-03 14:24 ` Giulio Benetti
2018-10-03 14:24 ` [PATCH v2 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if null Giulio Benetti
2018-10-03 14:24 ` Giulio Benetti
2018-10-03 14:24 ` Giulio Benetti
2018-10-04 19:56 ` Maxime Ripard
2018-10-04 19:56 ` Maxime Ripard
2018-10-04 19:56 ` Maxime Ripard
2018-10-05 21:38 ` Giulio Benetti
2018-10-05 21:38 ` Giulio Benetti
2018-10-05 21:59 ` [PATCH v3 1/2] drm/sun4i: tcon: fix check of tcon->panel null pointer Giulio Benetti
2018-10-05 21:59 ` Giulio Benetti
2018-10-05 21:59 ` Giulio Benetti
2018-10-05 21:59 ` [PATCH v3 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if NULL Giulio Benetti
2018-10-05 21:59 ` Giulio Benetti
2018-10-08 9:21 ` Maxime Ripard [this message]
2018-10-08 9:21 ` Maxime Ripard
2018-10-12 10:03 ` Chen-Yu Tsai
2018-10-12 10:03 ` Chen-Yu Tsai
2018-11-05 13:23 ` Icenowy Zheng
2018-11-05 13:23 ` Icenowy Zheng
2018-11-06 15:57 ` Maxime Ripard
2018-11-06 15:57 ` Maxime Ripard
2018-10-04 19:54 ` [PATCH v2 1/2] drm/sun4i: tcon: fix check of tcon->panel null pointer Maxime Ripard
2018-10-04 19:54 ` Maxime Ripard
2018-10-04 19:54 ` Maxime Ripard
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