modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/drivers/gpu/drm/virtio/virtgpu_ioctl.c
..
..
@@ -279,10 +279,18 @@
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 		drm_gem_object_release(obj);
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 		return ret;
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 	}
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-	drm_gem_object_put(obj);
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 	rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
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 	rc->bo_handle = handle;
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+
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+	/*
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+	 * The handle owns the reference now.  But we must drop our
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+	 * remaining reference *after* we no longer need to dereference
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+	 * the obj.  Otherwise userspace could guess the handle and
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+	 * race closing it from another thread.
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+	 */
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+	drm_gem_object_put(obj);
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+
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 	return 0;
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 }
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