From 8f6ccde9829ea0e4fe1c087e68bec4d9efb55c64 Mon Sep 17 00:00:00 2001
From: SendaoYan <syan@openjdk.org>
Date: Sat, 8 Feb 2025 13:11:07 +0000
Subject: [PATCH] 8349554: [UBSAN] os::attempt_reserve_memory_between reported
 applying non-zero offset to non-null pointer produced null pointer

Reviewed-by: stefank, stuefe
---
 src/hotspot/share/runtime/os.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hotspot/share/runtime/os.cpp b/src/hotspot/share/runtime/os.cpp
index 0654bd3e092..5bb32493962 100644
--- a/src/hotspot/share/runtime/os.cpp
+++ b/src/hotspot/share/runtime/os.cpp
@@ -2017,7 +2017,7 @@ char* os::attempt_reserve_memory_between(char* min, char* max, size_t bytes, siz
   }
 
   char* const hi_end = MIN2(max, absolute_max);
-  if ((uintptr_t)hi_end < bytes) {
+  if ((uintptr_t)hi_end <= bytes) {
     return nullptr; // no need to go on
   }
   char* const hi_att = align_down(hi_end - bytes, alignment_adjusted);