1 files changed, 2 insertions, 0 deletions
diff --git a/block.c b/block.c
index a6deaf8ad1..1bc766c778 100644
--- a/block.c
+++ b/block.c
@@ -6399,6 +6399,8 @@ BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs)
 void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs, BlkdebugEvent event)
 {
     IO_CODE();
+    assert_bdrv_graph_readable();
+
     if (!bs || !bs->drv || !bs->drv->bdrv_co_debug_event) {
         return;
     }