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Added kernel32-limit_heap_old_exe patchset

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Alistair Leslie-Hughes
2025-06-02 07:48:53 +10:00
parent ef72380f02
commit d1cc8d0fa5
2 changed files with 37 additions and 0 deletions
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36
patches/kernel32-limit_heap_old_exe/0001-kernel32-Limit-old-exe-to-3MB-available-space.patch Normal file
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@@ -0,0 +1,36 @@
From 764a3b19afc7519fa9568a402e094a944d56055c Mon Sep 17 00:00:00 2001
From: Akihiro Sagawa <sagawa.aki@gmail.com>
Date: Sun, 1 Jun 2025 15:42:40 +1000
Subject: [PATCH] kernel32: Limit old exe to 3MB available space
Wine-bug: https://bugs.winehq.org/show_bug.cgi?id=44931
---
dlls/kernel32/heap.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/dlls/kernel32/heap.c b/dlls/kernel32/heap.c
index 1ec2f5cce0d..834f4d07e9b 100644
--- a/dlls/kernel32/heap.c
+++ b/dlls/kernel32/heap.c
@@ -475,12 +475,15 @@ VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
if ( lpBuffer->dwAvailPhys + lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 - lpBuffer->dwAvailPhys - 1;
- /* limit page file size for really old binaries */
+ /* limit value for really old binaries */
+ /* use MAXLONG/2, so that dwAvailPhys + dwAvailPageFile < MAXLONG */
if (nt->OptionalHeader.MajorSubsystemVersion < 4 ||
nt->OptionalHeader.MajorOperatingSystemVersion < 4)
{
- if (lpBuffer->dwTotalPageFile > MAXLONG) lpBuffer->dwTotalPageFile = MAXLONG;
- if (lpBuffer->dwAvailPageFile > MAXLONG) lpBuffer->dwAvailPageFile = MAXLONG;
+ lpBuffer->dwTotalPhys = min(lpBuffer->dwTotalPhys, MAXLONG / 2);
+ lpBuffer->dwAvailPhys = min(lpBuffer->dwAvailPhys, MAXLONG / 2);
+ lpBuffer->dwTotalPageFile = min(lpBuffer->dwTotalPageFile, MAXLONG / 2);
+ lpBuffer->dwAvailPageFile = min(lpBuffer->dwAvailPageFile, MAXLONG / 2);
}
#endif
--
2.47.2

1
patches/kernel32-limit_heap_old_exe/definition Normal file
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Fixes: [44931] kernel32: Limit old exe to 3MB available space