From 14d24d749a60033636ddd068ba6cb322dc095958 Mon Sep 17 00:00:00 2001
From: Daniel Widdis <widdis@gmail.com>
Date: Tue, 18 Oct 2022 22:03:16 -0700
Subject: [PATCH] Zero memory and set size

Signed-off-by: Daniel Widdis <widdis@gmail.com>
---
 psutil/_psutil_windows.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/psutil/_psutil_windows.c b/psutil/_psutil_windows.c
index a99cfd7b3..3804dfa2c 100644
--- a/psutil/_psutil_windows.c
+++ b/psutil/_psutil_windows.c
@@ -611,6 +611,8 @@ psutil_proc_memory_uss(PyObject *self, PyObject *args) {
 static PyObject *
 psutil_virtual_mem(PyObject *self, PyObject *args) {
     PERFORMANCE_INFORMATION perfInfo;
+    ZeroMemory(&perfInfo, sizeof(PERFORMANCE_INFORMATION));
+    perfInfo.cb = sizeof(PERFORMANCE_INFORMATION);
     if (! GetPerformanceInfo(&perfInfo, sizeof(PERFORMANCE_INFORMATION))) {
         PyErr_SetFromWindowsErr(0);
         return NULL;