1 files changed, 3 insertions, 1 deletions
diff --git a/qemu-img.c b/qemu-img.c
index 7c05931866..cd0178b51b 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1991,7 +1991,9 @@ static void coroutine_fn convert_co_do_copy(void *opaque)
             qemu_co_mutex_unlock(&s->lock);
             break;
         }
-        n = convert_iteration_sectors(s, s->sector_num);
+        WITH_GRAPH_RDLOCK_GUARD() {
+            n = convert_iteration_sectors(s, s->sector_num);
+        }
         if (n < 0) {
             qemu_co_mutex_unlock(&s->lock);
             s->ret = n;