[PATCH -fixes] drm/vmwgfx: Fix nasty write past alloced memory area

[Thomas Hellstrom]

A typo may cause a write past the allocated area on 32-bit systems and
a resulting kernel oops. Triggers for example with the catia-03
Specviewperf test.

Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
Cc: stable at vger.kernel.org
---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

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++);
-- 
1.7.7.5