Alexandre Julliard : kernelbase: Don't use WRITECOPY protection on anonymous mappings.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2ac86fb8c3295886026ba0aaf7d2b38e81f343e6
URL:    https://gitlab.winehq.org/wine/wine/-/commit/2ac86fb8c3295886026ba0aaf7d2b38...

Author: Alexandre Julliard 
Date:   Wed Jun 19 21:00:46 2024 +0200

kernelbase: Don't use WRITECOPY protection on anonymous mappings.

---

dlls/kernelbase/memory.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/kernelbase/memory.c b/dlls/kernelbase/memory.c
index faa6bd7d5ee..46b155b7a47 100644
--- a/dlls/kernelbase/memory.c
+++ b/dlls/kernelbase/memory.c
@@ -604,7 +604,7 @@ BOOL WINAPI DECLSPEC_HOTPATCH WriteProcessMemory( HANDLE process, void *addr, co
                                                   SIZE_T size, SIZE_T *bytes_written )
 {
     CROSS_PROCESS_WORK_LIST *list = open_cross_process_connection( process );
-    DWORD old_prot, prot = PAGE_TARGETS_NO_UPDATE | PAGE_ENCLAVE_NO_CHANGE | PAGE_EXECUTE_WRITECOPY;
+    DWORD old_prot, prot = PAGE_TARGETS_NO_UPDATE | PAGE_ENCLAVE_NO_CHANGE;
     MEMORY_BASIC_INFORMATION info;
     void *base_addr;
     SIZE_T region_size;
@@ -634,6 +634,7 @@ BOOL WINAPI DECLSPEC_HOTPATCH WriteProcessMemory( HANDLE process, void *addr, co
         base_addr = ROUND_ADDR( addr );
         region_size = ROUND_SIZE( addr, size );
         region_size = min( region_size,  (char *)info.BaseAddress + info.RegionSize - (char *)base_addr );
+        prot |= (info.Type == MEM_PRIVATE) ? PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_WRITECOPY;

send_cross_process_notification( list, CrossProcessPreVirtualProtect,
                                          base_addr, region_size, 1, prot );