Paul Gofman : kernelbase: Validate nonzero size for MEM_RELEASE in VirtualFreeEx().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d8fc23d86e730e0ff8a2ab8e02285359a27c4a55
URL:    https://gitlab.winehq.org/wine/wine/-/commit/d8fc23d86e730e0ff8a2ab8e0228535...

Author: Paul Gofman 
Date:   Fri Nov 11 17:56:42 2022 -0600

kernelbase: Validate nonzero size for MEM_RELEASE in VirtualFreeEx().

---

dlls/kernelbase/memory.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dlls/kernelbase/memory.c b/dlls/kernelbase/memory.c
index c4a484b5a30..4188eebf181 100644
--- a/dlls/kernelbase/memory.c
+++ b/dlls/kernelbase/memory.c
@@ -457,6 +457,12 @@ BOOL WINAPI DECLSPEC_HOTPATCH VirtualFree( void *addr, SIZE_T size, DWORD type )
  */
 BOOL WINAPI DECLSPEC_HOTPATCH VirtualFreeEx( HANDLE process, void *addr, SIZE_T size, DWORD type )
 {
+    if (type == MEM_RELEASE && size)
+    {
+        WARN( "Trying to release memory with specified size.\n" );
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return FALSE;
+    }
     return set_ntstatus( NtFreeVirtualMemory( process, &addr, &size, type ));
 }