/* Basic tests for mseal. Copyright (C) 2025 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 . */ #include #include #include #include static int do_test (void) { TEST_VERIFY_EXIT (mseal (MAP_FAILED, 0, 0) == -1); if (errno == ENOSYS || errno == EPERM) FAIL_UNSUPPORTED ("kernel does not support mseal"); TEST_COMPARE (errno, EINVAL); size_t pagesize = getpagesize (); void *p = xmmap (NULL, 4 * pagesize, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1); xmunmap (p + 2 * pagesize, pagesize); /* Unaligned address. */ TEST_VERIFY_EXIT (mseal (p + 1, pagesize, 0) == -1); TEST_COMPARE (errno, EINVAL); /* Length too big. */ TEST_VERIFY_EXIT (mseal (p, 3 * pagesize, 0) == -1); TEST_COMPARE (errno, ENOMEM); TEST_VERIFY_EXIT (mseal (p, pagesize, 0) == 0); /* Apply the same seal should be idempotent. */ TEST_VERIFY_EXIT (mseal (p, pagesize, 0) == 0); TEST_VERIFY_EXIT (mprotect (p, pagesize, PROT_WRITE) == -1); TEST_COMPARE (errno, EPERM); TEST_VERIFY_EXIT (munmap (p, pagesize) == -1); TEST_COMPARE (errno, EPERM); TEST_VERIFY_EXIT (mremap (p, pagesize, 2 * pagesize, 0) == MAP_FAILED); TEST_COMPARE (errno, EPERM); TEST_VERIFY_EXIT (madvise (p, pagesize, MADV_DONTNEED) == -1); TEST_COMPARE (errno, EPERM); xmunmap (p + pagesize, pagesize); xmunmap (p + 3 * pagesize, pagesize); return 0; } #include