1 /*- 2 * Copyright (c) 2006 nCircle Network Security, Inc. 3 * All rights reserved. 4 * 5 * This software was developed by Robert N. M. Watson for the TrustedBSD 6 * Project under contract to nCircle Network Security, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY, 21 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * Confirm that calls to fhstatfs() require privilege, trying with, and 34 * without. We create a temporary file and grab the file handle using 35 * getfh() before starting. 36 */ 37 38 #include <sys/param.h> 39 #include <sys/mount.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <unistd.h> 44 45 #include "main.h" 46 47 void 48 priv_vfs_fhstatfs(void) 49 { 50 char fpath[1024]; 51 struct statfs sf; 52 fhandle_t fh; 53 int error; 54 55 assert_root(); 56 57 setup_file(fpath, UID_ROOT, GID_WHEEL, 0644); 58 59 if (getfh(fpath, &fh) < 0) { 60 warn("getfh(%s)", fpath); 61 goto out; 62 } 63 64 /* 65 * First, try with privilege. 66 */ 67 if (fhstatfs(&fh, &sf) < 0) { 68 warn("fhstatfs(%s) as root", fpath); 69 goto out; 70 } 71 72 /* 73 * Now, without privilege. 74 */ 75 set_euid(UID_OTHER); 76 77 error = fhstatfs(&fh, &sf); 78 if (error == 0) { 79 warnx("fhstatfs(%s) succeeded as !root", fpath); 80 goto out; 81 } 82 if (errno != EPERM) { 83 warn("fhstatfs(%s) wrong errno %d as !root", fpath, errno); 84 goto out; 85 } 86 out: 87 seteuid(UID_ROOT); 88 (void)unlink(fpath); 89 } 90