Commit 9b8eb4d1 authored by Dan Carpenter's avatar Dan Carpenter Committed by Dave Airlie
Browse files

drm/vmwgfx: return -EFAULT for copy_to_user errors



copy_to/from_user() returns the number of bytes remaining to be copied
but we want to return a negative error code here.  This gets returned to
userspace.
Signed-off-by: default avatarDan Carpenter <error27@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e902a358
......@@ -644,6 +644,7 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
ret = copy_from_user(cmd, user_cmd, arg->command_size);
if (unlikely(ret != 0)) {
ret = -EFAULT;
DRM_ERROR("Failed copying commands.\n");
goto out_commit;
}
......
......@@ -597,8 +597,10 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
ret = copy_from_user(srf->sizes, user_sizes,
srf->num_sizes * sizeof(*srf->sizes));
if (unlikely(ret != 0))
if (unlikely(ret != 0)) {
ret = -EFAULT;
goto out_err1;
}
if (srf->scanout &&
srf->num_sizes == 1 &&
......@@ -697,9 +699,11 @@ int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
if (user_sizes)
ret = copy_to_user(user_sizes, srf->sizes,
srf->num_sizes * sizeof(*srf->sizes));
if (unlikely(ret != 0))
if (unlikely(ret != 0)) {
DRM_ERROR("copy_to_user failed %p %u\n",
user_sizes, srf->num_sizes);
ret = -EFAULT;
}
out_bad_resource:
out_no_reference:
ttm_base_object_unref(&base);
......
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