suite/tests/client-interface/security.c

/* **********************************************************
 * Copyright (c) 2007-2010 VMware, Inc.  All rights reserved.
 * **********************************************************/

/*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of VMware, Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#include "tools.h"

/* Needed to avoid this MSVC 2010 warning on our intentional OOB write:
 * warning C4789: destination of memory copy is too small
 */
void **
pointer_plus_three(void **a)
{
    return a + 3;
}

void baz()
{
    print("** Return address successfully overwritten **\n");
    exit(1);
}

void bar()
{
    void **a[2];
    /* Can't create a new local or we'll disturb the frame layout. */
    print("** Return address successfully overwritten **\n");
    a[0] = pointer_plus_three((void **)a);
    *a[0] = (void *)baz;
}

void foo()
{
    void **a[2];
    /* Can't create a new local or we'll disturb the frame layout. */
    a[0] = pointer_plus_three((void **)a);
    *a[0] = (void *)bar;
}

int main()
{
    foo();
    fprintf(stderr, "** unexpected return from foo\n");
    fflush(stderr);
    return 0;
}