drm/vmwgfx: Fix nasty write past alloced memory area

commit 0824db38e515644f8d1bfd64adbd7cb2c6ea7c62 upstream.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c
index 51c9ba5cd2fbff85f4411ec6629f112ad8373a70..21ee7822656041c2e99c7f8f549038034f56c6ce 100644 (file)
--- 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++);