[reactos] 01/01: [DEVMGR] Avoid buffer overflow when device reg key size is > 100 chars

[Victor Perevertkin]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=953c03c336a762f3b4fd6…

commit 953c03c336a762f3b4fd672a546c4c0986dfab1c
Author:     Victor Perevertkin <victor.perevertkin(a)reactos.org>
AuthorDate: Thu Oct 22 14:38:55 2020 +0300
Commit:     Victor Perevertkin <victor.perevertkin(a)reactos.org>
CommitDate: Thu Oct 22 14:38:55 2020 +0300

    [DEVMGR] Avoid buffer overflow when device reg key size is > 100 chars
---
 dll/win32/devmgr/properties/hwresource.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/dll/win32/devmgr/properties/hwresource.cpp
b/dll/win32/devmgr/properties/hwresource.cpp
index 76879042415..a3e1a88b65e 100644
--- a/dll/win32/devmgr/properties/hwresource.cpp
+++ b/dll/win32/devmgr/properties/hwresource.cpp
@@ -357,13 +357,15 @@ PVOID
 GetResourceList(
     LPWSTR pszDeviceID)
 {
-    WCHAR szBuffer[100];
     PCM_RESOURCE_LIST pResourceList = NULL;
     HKEY hKey = NULL;
     DWORD dwError, dwSize;
 
-    wsprintf(szBuffer, L"SYSTEM\\CurrentControlSet\\Enum\\%s\\LogConf",
pszDeviceID);
-    dwError = RegOpenKeyExW(HKEY_LOCAL_MACHINE, szBuffer, 0, KEY_READ, &hKey);
+    CStringW keyName = L"SYSTEM\\CurrentControlSet\\Enum\\";
+    keyName += pszDeviceID;
+    keyName += L"\\LogConf";
+
+    dwError = RegOpenKeyExW(HKEY_LOCAL_MACHINE, keyName, 0, KEY_READ, &hKey);
     if (dwError != ERROR_SUCCESS)
     {
         /* failed to open device instance log conf dir */