linux-kernel - [ 07/41] [media] omap3isp: ccdc: Fix crash in HS/VS interrupt handler

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Date:	Fri, 16 Mar 2012 16:38:17 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Gary Thomas <gary@...assoc.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Sakari Ailus <sakari.ailus@....fi>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [ 07/41] [media] omap3isp: ccdc: Fix crash in HS/VS interrupt handler

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart@...asonboard.com>

commit bd0f2e6da7ea9e225cb2dbd3229e25584b0e9538 upstream.

The HS/VS interrupt handler needs to access the pipeline object. It
erronously tries to get it from the CCDC output video node, which isn't
necessarily included in the pipeline. This leads to a NULL pointer
dereference.

Fix the bug by getting the pipeline object from the CCDC subdev entity.

Reported-by: Gary Thomas <gary@...assoc.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@....fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/video/omap3isp/ispccdc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/media/video/omap3isp/ispccdc.c
+++ b/drivers/media/video/omap3isp/ispccdc.c
@@ -1406,8 +1406,7 @@ static int __ccdc_handle_stopping(struct
 
 static void ccdc_hs_vs_isr(struct isp_ccdc_device *ccdc)
 {
-	struct isp_pipeline *pipe =
-		to_isp_pipeline(&ccdc->video_out.video.entity);
+	struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity);
 	struct video_device *vdev = ccdc->subdev.devnode;
 	struct v4l2_event event;
 


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