[ros-bugs] [Bug 2936] Overwrite a loaded dll.

[ReactOS.Bugzilla at www.reactos.org]

http://www.reactos.org/bugzilla/show_bug.cgi?id=2936


Christoph_vW <Christoph at ApiViewer.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Christoph at ApiViewer.de




--- Comment #4 from Christoph_vW <Christoph at ApiViewer.de>  2009-02-02 17:50:41 CET ---
ReactOS should deny opening a file which is mapped into memory regardless if it
is still opened or not. (1224 / ERROR_USER_MAPPED_FILE)


new testcase:


#include <windows.h>
#include <stdio.h>

int main()
{
        HANDLE hFile, hFile2;
        HANDLE hMapping = NULL;
        LPVOID Addr = NULL;
        DWORD dwBytes = 0;
        BOOL RetVal;
        CHAR Test[] = "Daten";

        hFile = CreateFileA("test.txt", GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
        if (hFile == INVALID_HANDLE_VALUE)
        {
                printf("CreateFileA failed!\n");
                return 0;
        }

        hMapping = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
        if (hMapping == NULL)
        {
                printf("CreateFileMappingA failed! (%ld)\n", GetLastError());
                return 0;
        }

        Addr = MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0, 0);
        if (Addr == NULL)
        {
                printf("MapViewOfFile failed!\n");
                return 0;
        }

        CloseHandle(hFile);

        hFile2 = CreateFileA("test.txt", GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, 0, 0);
    if (hFile2 == INVALID_HANDLE_VALUE)
        {
                UnmapViewOfFile(Addr);
                printf("CreateFileA (2) failed (%ld)!\n", GetLastError());
                return 0;
        }


        RetVal = WriteFile(hFile2, (LPCVOID) Test, sizeof(Test), &dwBytes,
NULL);
        if (!RetVal)
        {
                printf("WriteFile failed (%ld)\n", GetLastError());
        }

        UnmapViewOfFile(Addr);

        CloseHandle(hMapping);
        CloseHandle(hFile2);


        return 0;
}


-- 
Configure bugmail: http://www.reactos.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.