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-rw-r--r--migration/block.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/migration/block.c b/migration/block.c
index 5f930870a5..d115e1cfa5 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -388,6 +388,8 @@ static int init_blk_migration(QEMUFile *f)
     Error *local_err = NULL;
     int ret;
 
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     block_mig_state.submitted = 0;
     block_mig_state.read_done = 0;
     block_mig_state.transferred = 0;