diff --git a/compiler-rt/lib/msan/msan_linux.cpp b/compiler-rt/lib/msan/msan_linux.cpp
--- a/compiler-rt/lib/msan/msan_linux.cpp
+++ b/compiler-rt/lib/msan/msan_linux.cpp
@@ -142,7 +142,7 @@
     if (map) {
       if (!CheckMemoryRangeAvailability(start, size))
         return false;
-      if (!MmapFixedNoReserve(start, size, kMemoryLayout[i].name))
+      if (!MmapFixedSuperNoReserve(start, size, kMemoryLayout[i].name))
         return false;
       if (common_flags()->use_madv_dontdump)
         DontDumpShadowMemory(start, size);