linux-kernel - [54/89] vmwgfx: Fix assignment in vmw_framebuffer_create

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Message-Id: <20120201210048.651659268@clark.kroah.org>
Date:	Wed, 01 Feb 2012 13:00:18 -0800
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, Ryan Mallon <rmallon@...il.com>,
	Jakob Bornecrantz <jakob@...are.com>,
	Dave Airlie <airlied@...hat.com>
Subject: [54/89] vmwgfx: Fix assignment in vmw_framebuffer_create_handle

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

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

From: Ryan Mallon <rmallon@...il.com>

commit bf9c05d5b6d19b3e4c9fe21047694e94f48db89b upstream.

The assignment of handle in vmw_framebuffer_create_handle doesn't actually do anything useful and is incorrectly assigning an integer value to a pointer argument. It appears that this is a typo and should be dereferencing handle rather than assigning to it directly. This fixes a bug where an undefined handle value is potentially returned to user-space.

Signed-off-by: Ryan Mallon <rmallon@...il.com>
Reviewed-by: Jakob Bornecrantz<jakob@...are.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -378,7 +378,7 @@ int vmw_framebuffer_create_handle(struct
 				  unsigned int *handle)
 {
 	if (handle)
-		handle = 0;
+		*handle = 0;
 
 	return 0;
 }


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