Re: Run-Time Check Failure #2

From:

"Manoj Jangid" <manojjangid@nath.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 1 Aug 2008 09:17:43 +0530

Message-ID:

<5D0DEAD5-4C38-4E70-8127-B38967B4F885@microsoft.com>

Thanks to all

I modified my code little bit now its working

  PTOKEN_PRIVILEGES tokenPrev = NULL;
  if(OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,&hToken))
  {
   if(!GetTokenInformation(hToken,TokenPrivileges,NULL,0,&dwTokenLength))
   {
    //allocate the buffer
    tokenPrev =
(PTOKEN_PRIVILEGES)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,dwTokenLength);
    GetTokenInformation(hToken,TokenPrivileges,tokenPrev,dwTokenLength,&dwTokenLength);
    for(int nCount = 0; nCount < tokenPrev->PrivilegeCount; nCount++)
    {
     TCHAR szPath[_MAX_PATH] = _T("");
     DWORD len = _MAX_PATH;
     LookupPrivilegeName(NULL,&tokenPrev->Privileges[nCount].Luid,szPath,&len);
     TRACE(szPath);
    }

    //free the buffer
    if(tokenPrev)
    {
     HeapFree(GetProcessHeap(), 0, (LPVOID)tokenPrev);
    }
   }
  }

  CloseHandle(hToken);
}

Thanks & Regards

Manoj Jangid

"Manoj" <manojjangid@nath.com> wrote in message
news:6B3840B7-A524-4C98-91AB-0157E9359776@microsoft.com...

Hi I am getting this error

Run-Time Check Failure #2 - Stack around the variable 'tokenPrev' was
corrupted.

I am also paste the my code can anyone tell me how can I fix this problem
?
//---------------------------------------------------------------------------------------------
BOOL CnewAppDlg::OnInitDialog()
{
    HANDLE hToken = NULL;
    DWORD hTokenLength = 0;
     TOKEN_PRIVILEGES tokenPrev = {0};
     if(OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,&hToken))
     {

if(!GetTokenInformation(hToken,TokenPrivileges,NULL,0,&hTokenLength))
          {

GetTokenInformation(hToken,TokenPrivileges,(LPVOID)&tokenPrev,hTokenLength,&hTokenLength);
               for(int nCount = 0; nCount < tokenPrev.PrivilegeCount;
nCount++)
               {
                    TCHAR szPath[_MAX_PATH] = _T("");
                    DWORD len = _MAX_PATH;

LookupPrivilegeName(NULL,&tokenPrev.Privileges[nCount].Luid,szPath,&len);
                    TRACE(szPath);
               }
          }
       }
     CloseHandle(hToken);
   }
   return TRUE; // return TRUE unless you set the focus to a control
}
//---------------------------------------------------------------------------------------------

Regards

Manoj Jangid