linux-kernel - [ 50/82] drm/vmwgfx: Fix nasty write past alloced memory area

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Message-Id: <20120608041847.540026866@decadent.org.uk>
Date:	Fri, 08 Jun 2012 05:19:30 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Thomas Hellstrom <thellstrom@...are.com>,
	Jakob Bornecrantz <jakob@...are.com>,
	Dave Airlie <airlied@...hat.com>
Subject: [ 50/82] drm/vmwgfx: Fix nasty write past alloced memory area

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

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

From: Thomas Hellstrom <thellstrom@...are.com>

commit 0824db38e515644f8d1bfd64adbd7cb2c6ea7c62 upstream.

Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Reviewed-by: Jakob Bornecrantz <jakob@...are.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c
index 51c9ba5..21ee782 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c
@@ -66,7 +66,7 @@ static int vmw_gmr2_bind(struct vmw_private *dev_priv,
 	cmd += sizeof(remap_cmd) / sizeof(uint32);
 
 	for (i = 0; i < num_pages; ++i) {
-		if (VMW_PPN_SIZE > 4)
+		if (VMW_PPN_SIZE <= 4)
 			*cmd = page_to_pfn(*pages++);
 		else
 			*((uint64_t *)cmd) = page_to_pfn(*pages++);


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