145 lines
4.4 KiB
C
145 lines
4.4 KiB
C
/* Check for GLOB_TIDLE heap allocation issues (bugs 22320, 22325, 22332).
|
|
Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <glob.h>
|
|
#include <mcheck.h>
|
|
#include <nss.h>
|
|
#include <pwd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
|
|
/* Flag which indicates whether to pass the GLOB_ONLYDIR flag. */
|
|
static int do_onlydir;
|
|
|
|
/* Flag which indicates whether to pass the GLOB_NOCHECK flag. */
|
|
static int do_nocheck;
|
|
|
|
/* Flag which indicates whether to pass the GLOB_MARK flag. */
|
|
static int do_mark;
|
|
|
|
/* Flag which indicates whether to pass the GLOB_NOESCAPE flag. */
|
|
static int do_noescape;
|
|
|
|
static void
|
|
one_test (const char *prefix, const char *middle, const char *suffix)
|
|
{
|
|
char *pattern = xasprintf ("%s%s%s", prefix, middle, suffix);
|
|
int flags = GLOB_TILDE;
|
|
if (do_onlydir)
|
|
flags |= GLOB_ONLYDIR;
|
|
if (do_nocheck)
|
|
flags |= GLOB_NOCHECK;
|
|
if (do_mark)
|
|
flags |= GLOB_MARK;
|
|
if (do_noescape)
|
|
flags |= GLOB_NOESCAPE;
|
|
glob_t gl;
|
|
/* This glob call might result in crashes or memory leaks. */
|
|
if (glob (pattern, flags, NULL, &gl) == 0)
|
|
globfree (&gl);
|
|
free (pattern);
|
|
}
|
|
|
|
enum
|
|
{
|
|
/* The largest base being tested. */
|
|
largest_base_size = 500000,
|
|
|
|
/* The actual size is the base size plus a variable whose absolute
|
|
value is not greater than this. This helps malloc to trigger
|
|
overflows. */
|
|
max_size_skew = 16,
|
|
|
|
/* The maximum string length supported by repeating_string
|
|
below. */
|
|
repeat_size = largest_base_size + max_size_skew,
|
|
};
|
|
|
|
/* Used to construct strings which repeat a single character 'x'. */
|
|
static char *repeat;
|
|
|
|
/* Return a string of SIZE characters. */
|
|
const char *
|
|
repeating_string (int size)
|
|
{
|
|
TEST_VERIFY (size >= 0);
|
|
TEST_VERIFY (size <= repeat_size);
|
|
const char *repeated_shifted = repeat + repeat_size - size;
|
|
TEST_VERIFY (strlen (repeated_shifted) == size);
|
|
return repeated_shifted;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* Avoid network-based NSS modules and initialize nss_files with a
|
|
dummy lookup. This has to come before mtrace because NSS does
|
|
not free all memory. */
|
|
__nss_configure_lookup ("passwd", "files");
|
|
(void) getpwnam ("root");
|
|
|
|
mtrace ();
|
|
|
|
repeat = xmalloc (repeat_size + 1);
|
|
memset (repeat, 'x', repeat_size);
|
|
repeat[repeat_size] = '\0';
|
|
|
|
/* These numbers control the size of the user name. The values
|
|
cover the minimum (0), a typical size (8), a large
|
|
stack-allocated size (100000), and a somewhat large
|
|
heap-allocated size (largest_base_size). */
|
|
static const int base_sizes[] = { 0, 8, 100, 100000, largest_base_size, -1 };
|
|
|
|
for (do_onlydir = 0; do_onlydir < 2; ++do_onlydir)
|
|
for (do_nocheck = 0; do_nocheck < 2; ++do_nocheck)
|
|
for (do_mark = 0; do_mark < 2; ++do_mark)
|
|
for (do_noescape = 0; do_noescape < 2; ++do_noescape)
|
|
for (int base_idx = 0; base_sizes[base_idx] >= 0; ++base_idx)
|
|
{
|
|
for (int size_skew = -max_size_skew; size_skew <= max_size_skew;
|
|
++size_skew)
|
|
{
|
|
int size = base_sizes[base_idx] + size_skew;
|
|
if (size < 0)
|
|
continue;
|
|
|
|
const char *user_name = repeating_string (size);
|
|
one_test ("~", user_name, "/a/b");
|
|
one_test ("~", user_name, "x\\x\\x////x\\a");
|
|
}
|
|
|
|
const char *user_name = repeating_string (base_sizes[base_idx]);
|
|
one_test ("~", user_name, "");
|
|
one_test ("~", user_name, "/");
|
|
one_test ("~", user_name, "/a");
|
|
one_test ("~", user_name, "/*/*");
|
|
one_test ("~", user_name, "\\/");
|
|
one_test ("/~", user_name, "");
|
|
one_test ("*/~", user_name, "/a/b");
|
|
}
|
|
|
|
free (repeat);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TIMEOUT 200
|
|
#include <support/test-driver.c>
|