| /* 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> |