src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/abi/x64/sysv/SysVVaList.java

@@ -137,13 +137,11 @@
          MemoryAddress base = ms.baseAddress();
          VH_gp_offset.set(base, MAX_GP_OFFSET);
          VH_fp_offset.set(base, MAX_FP_OFFSET);
          VH_overflow_arg_area.set(base, MemoryAddress.NULL);
          VH_reg_save_area.set(base, MemoryAddress.NULL);
-         MemorySegment unconfined = NativeMemorySegmentImpl.makeNativeSegmentUnchecked(
-                 base, ms.byteSize(), null, null, null).withAccessModes(0);
-         return unconfined.baseAddress();
+         return ms.withAccessModes(0).baseAddress();
      }
  
      public static CSupport.VaList empty() {
          return EMPTY;
      }