1 files changed, 321 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_chroot.c b/src/regress/lib/libc/sys/t_chroot.c
new file mode 100644
index 0000000000..1fbe392a88
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_chroot.c
@@ -0,0 +1,321 @@
+/*      $OpenBSD: t_chroot.c,v 1.1.1.1 2019/11/19 19:57:03 bluhm Exp $  */
+/* $NetBSD: t_chroot.c,v 1.2 2017/01/10 22:36:29 christos Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jukka Ruohonen.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 "macros.h"
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_chroot.c,v 1.2 2017/01/10 22:36:29 christos Exp $");
+
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "atf-c.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+ATF_TC(chroot_basic);
+ATF_TC_HEAD(chroot_basic, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "A basic test of chroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(chroot_basic, tc)
+{
+        char buf[PATH_MAX];
+        int fd, sta;
+        pid_t pid;
+
+        (void)memset(buf, '\0', sizeof(buf));
+        (void)getcwd(buf, sizeof(buf));
+        (void)strlcat(buf, "/dir", sizeof(buf));
+
+        ATF_REQUIRE(mkdir(buf, 0500) == 0);
+        ATF_REQUIRE(chdir(buf) == 0);
+
+        pid = fork();
+        ATF_REQUIRE(pid >= 0);
+
+        if (pid == 0) {
+
+                if (chroot(buf) != 0)
+                        _exit(EXIT_FAILURE);
+
+                errno = 0;
+
+                if (chroot("/root") != -1)
+                        _exit(EXIT_FAILURE);
+
+                if (errno != ENOENT)
+                        _exit(EXIT_FAILURE);
+
+                fd = open("file", O_RDONLY | O_CREAT, 0600);
+
+                if (fd < 0)
+                        _exit(EXIT_FAILURE);
+
+                if (close(fd) != 0)
+                        _exit(EXIT_FAILURE);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)wait(&sta);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                atf_tc_fail("chroot(2) failed");
+
+        (void)chdir("/");
+        (void)strlcat(buf, "/file", sizeof(buf));
+
+        fd = open(buf, O_RDONLY);
+
+        if (fd < 0)
+                atf_tc_fail("chroot(2) did not change the root directory");
+
+        ATF_REQUIRE(close(fd) == 0);
+        ATF_REQUIRE(unlink(buf) == 0);
+}
+
+ATF_TC(chroot_err);
+ATF_TC_HEAD(chroot_err, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test error conditions of chroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(chroot_err, tc)
+{
+        char buf[PATH_MAX + 1];
+
+        (void)memset(buf, 'x', sizeof(buf));
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENAMETOOLONG, chroot(buf) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(EFAULT, chroot((void *)-1) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENOENT, chroot("/a/b/c/d/e/f/g/h/i/j") == -1);
+}
+
+ATF_TC(chroot_perm);
+ATF_TC_HEAD(chroot_perm, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test permissions with chroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "unprivileged");
+}
+
+ATF_TC_BODY(chroot_perm, tc)
+{
+        static char buf[LINE_MAX];
+        pid_t pid;
+        int sta;
+
+        (void)memset(buf, '\0', sizeof(buf));
+        ATF_REQUIRE(getcwd(buf, sizeof(buf)) != NULL);
+
+        pid = fork();
+        ATF_REQUIRE(pid >= 0);
+
+        if (pid == 0) {
+
+                errno = 0;
+
+                if (chroot(buf) != -1)
+                        _exit(EXIT_FAILURE);
+
+                if (errno != EPERM)
+                        _exit(EXIT_FAILURE);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)wait(&sta);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                atf_tc_fail("chroot(2) succeeded as unprivileged user");
+}
+
+ATF_TC(fchroot_basic);
+ATF_TC_HEAD(fchroot_basic, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "A basic test of fchroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(fchroot_basic, tc)
+{
+        char buf[PATH_MAX];
+        int fd, sta;
+        pid_t pid;
+
+        (void)memset(buf, '\0', sizeof(buf));
+        (void)getcwd(buf, sizeof(buf));
+        (void)strlcat(buf, "/dir", sizeof(buf));
+
+        ATF_REQUIRE(mkdir(buf, 0500) == 0);
+        ATF_REQUIRE(chdir(buf) == 0);
+
+        fd = open(buf, O_RDONLY);
+        ATF_REQUIRE(fd >= 0);
+
+        pid = fork();
+        ATF_REQUIRE(pid >= 0);
+
+        if (pid == 0) {
+
+                if (fchroot(fd) != 0)
+                        _exit(EXIT_FAILURE);
+
+                if (close(fd) != 0)
+                        _exit(EXIT_FAILURE);
+
+                fd = open("file", O_RDONLY | O_CREAT, 0600);
+
+                if (fd < 0)
+                        _exit(EXIT_FAILURE);
+
+                if (close(fd) != 0)
+                        _exit(EXIT_FAILURE);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)wait(&sta);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                atf_tc_fail("fchroot(2) failed");
+
+        (void)chdir("/");
+        (void)strlcat(buf, "/file", sizeof(buf));
+
+        fd = open(buf, O_RDONLY);
+
+        if (fd < 0)
+                atf_tc_fail("fchroot(2) did not change the root directory");
+
+        ATF_REQUIRE(close(fd) == 0);
+        ATF_REQUIRE(unlink(buf) == 0);
+}
+
+ATF_TC(fchroot_err);
+ATF_TC_HEAD(fchroot_err, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test error conditions of fchroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(fchroot_err, tc)
+{
+        int fd;
+
+        fd = open("/etc/passwd", O_RDONLY);
+        ATF_REQUIRE(fd >= 0);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(EBADF, fchroot(-1) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENOTDIR, fchroot(fd) == -1);
+
+        ATF_REQUIRE(close(fd) == 0);
+}
+
+ATF_TC(fchroot_perm);
+ATF_TC_HEAD(fchroot_perm, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test permissions with fchroot(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(fchroot_perm, tc)
+{
+        static char buf[LINE_MAX];
+        struct passwd *pw;
+        int fd, sta;
+        pid_t pid;
+
+        (void)memset(buf, '\0', sizeof(buf));
+        ATF_REQUIRE(getcwd(buf, sizeof(buf)) != NULL);
+
+        pw = getpwnam("nobody");
+        fd = open(buf, O_RDONLY);
+
+        ATF_REQUIRE(fd >= 0);
+        ATF_REQUIRE(pw != NULL);
+
+        pid = fork();
+        ATF_REQUIRE(pid >= 0);
+
+        if (pid == 0) {
+
+                (void)setuid(pw->pw_uid);
+
+                errno = 0;
+
+                if (fchroot(fd) != -1)
+                        _exit(EXIT_FAILURE);
+
+                if (errno != EPERM)
+                        _exit(EXIT_FAILURE);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)wait(&sta);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                atf_tc_fail("fchroot(2) succeeded as unprivileged user");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, chroot_basic);
+        ATF_TP_ADD_TC(tp, chroot_err);
+        ATF_TP_ADD_TC(tp, chroot_perm);
+/*
+ *      Not available on OpenBSD
+ *      ATF_TP_ADD_TC(tp, fchroot_basic);
+ *      ATF_TP_ADD_TC(tp, fchroot_err);
+ *      ATF_TP_ADD_TC(tp, fchroot_perm);
+ */
+
+        return atf_no_error();
+}