950a58e24d
Add tests for the above. Add the fortify implementations of __stpcpy_chk and __stpncpy_chk. Modify the strncpy test to cover more cases and use this template for stpncpy. Add all of the fortify test cases. Bug: 13746695 Change-Id: I8c0f0d4991a878b8e8734fff12c8b73b07fdd344
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
/*
|
|
* Copyright (C) 2012 The Android Open Source Project
|
|
* 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.
|
|
*
|
|
* 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 THE
|
|
* COPYRIGHT OWNER 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.
|
|
*/
|
|
|
|
#undef _FORTIFY_SOURCE
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "private/libc_logging.h"
|
|
|
|
/*
|
|
* Runtime implementation of __builtin____strcpy_chk.
|
|
*
|
|
* See
|
|
* http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html
|
|
* http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
|
|
* for details.
|
|
*
|
|
* This strcpy check is called if _FORTIFY_SOURCE is defined and
|
|
* greater than 0.
|
|
*/
|
|
extern "C" char* __strcpy_chk(char* dest, const char* src, size_t dest_len) {
|
|
// TODO: optimize so we don't scan src twice.
|
|
size_t src_len = strlen(src) + 1;
|
|
if (__predict_false(src_len > dest_len)) {
|
|
__fortify_chk_fail("strcpy: prevented write past end of buffer",
|
|
BIONIC_EVENT_STRCPY_BUFFER_OVERFLOW);
|
|
}
|
|
|
|
return strcpy(dest, src);
|
|
}
|