need to check if the child obj is on an ro region (#67729)

when we check if a card is needed, we need to check if the child obj is in an ro region before getting its gen_num since there's no region data structure for it.

diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index 0b64b0c..a89bf11 100644 (file)
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -43062,7 +43062,7 @@ BOOL gc_heap::check_need_card (uint8_t* child_obj, int gen_num_for_cards,
                                uint8_t* low, uint8_t* high)
 {
 #ifdef USE_REGIONS
-    return (get_region_gen_num (child_obj) < gen_num_for_cards);
+    return (is_in_heap_range (child_obj) && (get_region_gen_num (child_obj) < gen_num_for_cards));
 #else
     return ((child_obj < high) && (child_obj >= low));
 #endif //USE_REGIONS