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-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.c7
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_surface.c6
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 03854d606d58..e13b20bd9908 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1052,10 +1052,15 @@ static struct vmw_master *vmw_master_check(struct drm_device *dev,
}
/*
- * Check if we were previously master, but now dropped.
+ * Check if we were previously master, but now dropped. In that
+ * case, allow at least render node functionality.
*/
if (vmw_fp->locked_master) {
mutex_unlock(&dev->master_mutex);
+
+ if (flags & DRM_RENDER_ALLOW)
+ return NULL;
+
DRM_ERROR("Dropped master trying to access ioctl that "
"requires authentication.\n");
return ERR_PTR(-EACCES);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
index 5b8595b78429..3361769842f4 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
@@ -911,6 +911,12 @@ vmw_surface_handle_reference(struct vmw_private *dev_priv,
"surface reference.\n");
return -EACCES;
}
+ if (ACCESS_ONCE(vmw_fpriv(file_priv)->locked_master)) {
+ DRM_ERROR("Locked master refused legacy "
+ "surface reference.\n");
+ return -EACCES;
+ }
+
handle = u_handle;
}