1 files changed, 10 insertions, 1 deletions

diff --git a/block.c b/block.c
index 142e1d5e2b..6ce3e2ad7a 100644
--- a/block.c
+++ b/block.c
@@ -6692,7 +6692,8 @@ void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs, BlkdebugEvent event)
     bs->drv->bdrv_co_debug_event(bs, event);
 }
 
-static BlockDriverState *bdrv_find_debug_node(BlockDriverState *bs)
+static BlockDriverState * GRAPH_RDLOCK
+bdrv_find_debug_node(BlockDriverState *bs)
 {
     GLOBAL_STATE_CODE();
     while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) {
@@ -6711,6 +6712,8 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
                           const char *tag)
 {
     GLOBAL_STATE_CODE();
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     bs = bdrv_find_debug_node(bs);
     if (bs) {
         return bs->drv->bdrv_debug_breakpoint(bs, event, tag);
@@ -6722,6 +6725,8 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
 {
     GLOBAL_STATE_CODE();
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     bs = bdrv_find_debug_node(bs);
     if (bs) {
         return bs->drv->bdrv_debug_remove_breakpoint(bs, tag);
@@ -6733,6 +6738,8 @@ int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
 int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
 {
     GLOBAL_STATE_CODE();
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     while (bs && (!bs->drv || !bs->drv->bdrv_debug_resume)) {
         bs = bdrv_primary_bs(bs);
     }
@@ -6747,6 +6754,8 @@ int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag)
 {
     GLOBAL_STATE_CODE();
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     while (bs && bs->drv && !bs->drv->bdrv_debug_is_suspended) {
         bs = bdrv_primary_bs(bs);
     }