1 files changed, 2 insertions, 0 deletions
diff --git a/block.c b/block.c
index 738b42046c..1060194e8f 100644
--- a/block.c
+++ b/block.c
@@ -6849,6 +6849,7 @@ void coroutine_fn bdrv_co_eject(BlockDriverState *bs, bool eject_flag)
 {
     BlockDriver *drv = bs->drv;
     IO_CODE();
+    assert_bdrv_graph_readable();
 
     if (drv && drv->bdrv_co_eject) {
         drv->bdrv_co_eject(bs, eject_flag);
@@ -6863,6 +6864,7 @@ void coroutine_fn bdrv_co_lock_medium(BlockDriverState *bs, bool locked)
 {
     BlockDriver *drv = bs->drv;
     IO_CODE();
+    assert_bdrv_graph_readable();
     trace_bdrv_lock_medium(bs, locked);
 
     if (drv && drv->bdrv_co_lock_medium) {