linux-kernel - [PATCH 3.13 127/163] [media] vb2: fix plane index sanity check in vb2_plane

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Message-Id: <1412888588-26755-128-git-send-email-kamal@canonical.com>
Date:	Thu,  9 Oct 2014 14:02:32 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Zhaowei Yuan <zhaowei.yuan@...sung.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 127/163] [media] vb2: fix plane index sanity check in vb2_plane_cookie()

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

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

From: Zhaowei Yuan <zhaowei.yuan@...sung.com>

commit a9ae4692eda4b99f85757b15d60971ff78a0a0e2 upstream.

It's also invalid when plane_no is equal to vb->num_planes

Signed-off-by: Zhaowei Yuan <zhaowei.yuan@...sung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/media/v4l2-core/videobuf2-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 0edc165..7db9b5b 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -885,7 +885,7 @@ void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)
 {
 	struct vb2_queue *q = vb->vb2_queue;
 
-	if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
+	if (plane_no >= vb->num_planes || !vb->planes[plane_no].mem_priv)
 		return NULL;
 
 	return call_memop(q, cookie, vb->planes[plane_no].mem_priv);
-- 
1.9.1

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