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-rw-r--r--memory.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/memory.c b/memory.c
index ed8b5aa83e..d61caee867 100644
--- a/memory.c
+++ b/memory.c
@@ -917,6 +917,8 @@ void memory_region_transaction_commit(void)
     AddressSpace *as;
 
     assert(memory_region_transaction_depth);
+    assert(qemu_mutex_iothread_locked());
+
     --memory_region_transaction_depth;
     if (!memory_region_transaction_depth) {
         if (memory_region_update_pending) {