vmwgfx: Fix assignment in vmw_framebuffer_create_handle

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@gmail.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_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index dfe32e62bd90cc083a6667a3090b02c694984e92..8a38c91f4c9c216d8f0fbe9b2ab4fdf01f5fd1ba 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -313,7 +313,7 @@ int vmw_framebuffer_create_handle(struct drm_framebuffer *fb,
                                  unsigned int *handle)
 {
        if (handle)
-               handle = 0;
+               *handle = 0;
 
        return 0;
 }