Calls to the FreeSid() function crashes my MFC application on Windows 7

Question

FreeSid() crashes frequently on Windows 7 in our MFC application. It has been working perfectly fine in Windows XP for years.

Does anyone know the workaround for this?

Someone else had this same problem in VB , but it is not clear how to fix it in C++.

Answer 1

There are different ways to free a SID. If you get it from ConvertStringSidToSid , use LocalFree . If you get it from AllocateAndInitializeSid , use FreeSid . Mixing the two will give undefined results which may differ between Windows versions.