[PATCH 2/7] kernelbase: Validate nonzero size for MEM_RELEASE in VirtualFreeEx().

[Paul Gofman]

From: Paul Gofman

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

diff --git a/dlls/kernelbase/memory.c b/dlls/kernelbase/memory.c
index 2a503587e93..c01fe817972 100644
--- a/dlls/kernelbase/memory.c
+++ b/dlls/kernelbase/memory.c
@@ -447,6 +447,12 @@ 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 ));
 }