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/*
* Copyright (c) 2017 Jan Kokemüller
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <atf-c.h>
ATF_TC(realpath_buffer_overflow);
ATF_TC_HEAD(realpath_buffer_overflow, tc)
{
atf_tc_set_md_var(tc, "descr",
"Test for out of bounds read from 'left' array "
"(compile realpath.c with '-fsanitize=address')");
}
ATF_TC_BODY(realpath_buffer_overflow, tc)
{
char path[MAXPATHLEN] = { 0 };
char resb[MAXPATHLEN] = { 0 };
size_t i;
path[0] = 'a';
path[1] = '/';
for (i = 2; i < sizeof(path) - 1; ++i) {
path[i] = 'a';
}
ATF_REQUIRE(realpath(path, resb) == NULL);
}
ATF_TC(realpath_empty_symlink);
ATF_TC_HEAD(realpath_empty_symlink, tc)
{
atf_tc_set_md_var(tc, "descr",
"Test for correct behavior when encountering empty symlinks");
}
ATF_TC_BODY(realpath_empty_symlink, tc)
{
char path[MAXPATHLEN] = { 0 };
char slnk[MAXPATHLEN] = { 0 };
char resb[MAXPATHLEN] = { 0 };
int fd;
(void)strlcat(slnk, "empty_symlink", sizeof(slnk));
ATF_REQUIRE(symlink("", slnk) == 0);
fd = open("aaa", O_RDONLY | O_CREAT, 0600);
ATF_REQUIRE(fd >= 0);
ATF_REQUIRE(close(fd) == 0);
(void)strlcat(path, "empty_symlink", sizeof(path));
(void)strlcat(path, "/aaa", sizeof(path));
ATF_REQUIRE_ERRNO(ENOENT, realpath(path, resb) == NULL);
ATF_REQUIRE(unlink("aaa") == 0);
ATF_REQUIRE(unlink(slnk) == 0);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, realpath_buffer_overflow);
ATF_TP_ADD_TC(tp, realpath_empty_symlink);
return atf_no_error();
}
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