linux-kernel - Re: [PATCH] media: v4l: async: Fix NULL pointer dereference in adding ancillary links

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Message-ID: <20240517090330.GA23279@linuxcarl2.richtek.com>
Date: Fri, 17 May 2024 17:03:30 +0800
From: ChiYuan Huang <cy_huang@...htek.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>, Mauro Carvalho Chehab
	<mchehab@...nel.org>
CC: Daniel Scally <djrscally@...il.com>, Laurent Pinchart
	<laurent.pinchart@...asonboard.com>, Jean-Michel Hautbois
	<jeanmichel.hautbois@...asonboard.com>, <linux-media@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] media: v4l: async: Fix NULL pointer dereference in
 adding ancillary links

On Fri, May 17, 2024 at 04:51:29PM +0800, cy_huang@...htek.com wrote:
> From: ChiYuan Huang <cy_huang@...htek.com>
> 
> In v4l2_async_create_ancillary_links(), ancillary links are created for
> lens and flash sub-devices. These are sub-device to sub-device links and if
> the async notifier is related to a V4L2 device, the source sub-device of
> the ancillary link is NULL, leading to a NULL pointer dereference. Check
> the notifier's sd field is non-NULL in v4l2_async_create_ancillary_links().

Not seeing the message 'No send the v2 patch'. Please ignore this one.