Dmitry V. Levin
05a9a86c23
* tests/ioctl_nsfs.c (test_user_namespace): Specify an address in the middle of a mapped page as child_stack address argument of the clone call. [IA64] (clone): Update.
146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/*
|
|
* Check decoding of NS_* commands of ioctl syscall.
|
|
*
|
|
* Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "tests.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <sched.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include "nsfs.h"
|
|
|
|
#ifndef CLONE_NEWUSER
|
|
# define CLONE_NEWUSER 0x10000000
|
|
#endif
|
|
|
|
static void
|
|
test_no_namespace(void)
|
|
{
|
|
ioctl(-1, NS_GET_USERNS);
|
|
printf("ioctl(-1, NS_GET_USERNS) = -1 EBADF (%m)\n");
|
|
ioctl(-1, NS_GET_PARENT);
|
|
printf("ioctl(-1, NS_GET_PARENT) = -1 EBADF (%m)\n");
|
|
ioctl(-1, NS_GET_NSTYPE);
|
|
printf("ioctl(-1, NS_GET_NSTYPE) = -1 EBADF (%m)\n");
|
|
ioctl(-1, NS_GET_OWNER_UID, NULL);
|
|
printf("ioctl(-1, NS_GET_OWNER_UID, NULL) = -1 EBADF (%m)\n");
|
|
}
|
|
|
|
static void
|
|
test_clone(pid_t pid)
|
|
{
|
|
char path[sizeof("/proc/%d/ns/user") + sizeof(int)*3];
|
|
snprintf(path, sizeof(path), "/proc/%d/ns/user", pid);
|
|
|
|
int ns_fd = open(path, O_RDONLY);
|
|
if (ns_fd == -1)
|
|
perror_msg_and_skip("open: %s", path);
|
|
|
|
int userns_fd = ioctl(ns_fd, NS_GET_USERNS);
|
|
printf("ioctl(%d, NS_GET_USERNS) = %s\n", ns_fd, sprintrc(userns_fd));
|
|
|
|
int parent_ns_fd = ioctl(userns_fd, NS_GET_PARENT);
|
|
printf("ioctl(%d, NS_GET_PARENT) = %s\n",
|
|
userns_fd, sprintrc(parent_ns_fd));
|
|
|
|
int nstype = ioctl(userns_fd, NS_GET_NSTYPE);
|
|
if (nstype == -1) {
|
|
printf("ioctl(%d, NS_GET_NSTYPE) = %s\n",
|
|
userns_fd, sprintrc(nstype));
|
|
} else {
|
|
printf("ioctl(%d, NS_GET_NSTYPE) = %d (CLONE_NEWUSER)\n",
|
|
userns_fd, nstype);
|
|
}
|
|
|
|
TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, uid);
|
|
int rc = ioctl(userns_fd, NS_GET_OWNER_UID, uid);
|
|
if (rc == -1) {
|
|
printf("ioctl(%d, NS_GET_OWNER_UID, %p) = %s\n",
|
|
userns_fd, uid, sprintrc(rc));
|
|
} else {
|
|
printf("ioctl(%d, NS_GET_OWNER_UID, [%u]) = %d\n",
|
|
userns_fd, *uid, rc);
|
|
}
|
|
}
|
|
|
|
static int
|
|
child(void *arg)
|
|
{
|
|
int *pipefd = (int *) arg;
|
|
close(pipefd[1]);
|
|
/* Wait for EOF from pipe. */
|
|
if (read(pipefd[0], &pipefd[1], 1))
|
|
perror_msg_and_fail("read");
|
|
return 0;
|
|
}
|
|
|
|
#ifdef IA64
|
|
extern int __clone2(int (*)(void *), void *, size_t, int, void *, ...);
|
|
# define clone(fn, child_stack, flags, arg) \
|
|
__clone2(fn, child_stack, get_page_size() / 2, flags, arg)
|
|
#endif
|
|
|
|
static void
|
|
test_user_namespace(void)
|
|
{
|
|
pid_t pid;
|
|
int pipefd[2];
|
|
int status;
|
|
|
|
if (pipe(pipefd))
|
|
perror_msg_and_fail("pipe");
|
|
|
|
pid = clone(child, tail_alloc(get_page_size() / 2),
|
|
CLONE_NEWUSER | CLONE_UNTRACED | SIGCHLD, pipefd);
|
|
if (pid == -1) {
|
|
perror("clone");
|
|
return;
|
|
}
|
|
close(pipefd[0]);
|
|
test_clone(pid);
|
|
close(pipefd[1]);
|
|
if (wait(&status) != pid) {
|
|
perror_msg_and_fail("wait");
|
|
} else if (status != 0) {
|
|
error_msg_and_fail("unexpected child exit status %d", status);
|
|
}
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
test_no_namespace();
|
|
test_user_namespace();
|
|
puts("+++ exited with 0 +++");
|
|
return 0;
|
|
}
|