1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 4f08c3bdfSopenharmony_ci * Ported by John George 5f08c3bdfSopenharmony_ci * Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com> 6f08c3bdfSopenharmony_ci */ 7f08c3bdfSopenharmony_ci 8f08c3bdfSopenharmony_ci/*\ 9f08c3bdfSopenharmony_ci * [Description] 10f08c3bdfSopenharmony_ci * 11f08c3bdfSopenharmony_ci * Verify that setreuid(2) syscall fails with EPERM errno when the calling 12f08c3bdfSopenharmony_ci * process is not privileged and a change other than 13f08c3bdfSopenharmony_ci * (i) swapping the effective user ID with the real user ID, or 14f08c3bdfSopenharmony_ci * (ii) setting one to the value of the other or 15f08c3bdfSopenharmony_ci * (iii) setting the effective user ID to the value of the saved set-user-ID 16f08c3bdfSopenharmony_ci * was specified. 17f08c3bdfSopenharmony_ci */ 18f08c3bdfSopenharmony_ci 19f08c3bdfSopenharmony_ci#include <pwd.h> 20f08c3bdfSopenharmony_ci#include "tst_test.h" 21f08c3bdfSopenharmony_ci#include "tst_uid.h" 22f08c3bdfSopenharmony_ci#include "compat_tst_16.h" 23f08c3bdfSopenharmony_ci 24f08c3bdfSopenharmony_cistatic struct passwd *ltpuser; 25f08c3bdfSopenharmony_cistatic uid_t other_uid; 26f08c3bdfSopenharmony_ci 27f08c3bdfSopenharmony_cistatic void setup(void) 28f08c3bdfSopenharmony_ci{ 29f08c3bdfSopenharmony_ci tst_get_uids(&other_uid, 0, 1); 30f08c3bdfSopenharmony_ci 31f08c3bdfSopenharmony_ci UID16_CHECK(other_uid, setreuid); 32f08c3bdfSopenharmony_ci 33f08c3bdfSopenharmony_ci ltpuser = SAFE_GETPWNAM("nobody"); 34f08c3bdfSopenharmony_ci SAFE_SETUID(ltpuser->pw_uid); 35f08c3bdfSopenharmony_ci} 36f08c3bdfSopenharmony_ci 37f08c3bdfSopenharmony_cistatic void run(void) 38f08c3bdfSopenharmony_ci{ 39f08c3bdfSopenharmony_ci 40f08c3bdfSopenharmony_ci TST_EXP_FAIL(SETREUID(-1, other_uid), EPERM, 41f08c3bdfSopenharmony_ci "setreuid(%d, %d)", -1, other_uid); 42f08c3bdfSopenharmony_ci TST_EXP_FAIL(SETREUID(other_uid, -1), EPERM, 43f08c3bdfSopenharmony_ci "setreuid(%d, %d)", other_uid, -1); 44f08c3bdfSopenharmony_ci TST_EXP_FAIL(SETREUID(other_uid, other_uid), EPERM, 45f08c3bdfSopenharmony_ci "setreuid(%d, %d)", other_uid, other_uid); 46f08c3bdfSopenharmony_ci} 47f08c3bdfSopenharmony_ci 48f08c3bdfSopenharmony_cistatic struct tst_test test = { 49f08c3bdfSopenharmony_ci .setup = setup, 50f08c3bdfSopenharmony_ci .test_all = run, 51f08c3bdfSopenharmony_ci .needs_root = 1 52f08c3bdfSopenharmony_ci}; 53