tests/fs/vfs/t_unpriv.c

   1 /*      $NetBSD: t_unpriv.c,v 1.12 2015/04/09 19:51:13 riastradh Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/stat.h>
  30 #include <sys/time.h>
  31
  32 #include <atf-c.h>
  33 #include <libgen.h>
  34 #include <limits.h>
  35 #include <unistd.h>
  36
  37 #include <rump/rump_syscalls.h>
  38 #include <rump/rump.h>
  39
  40 #include "../common/h_fsmacros.h"
  41 #include "../../h_macros.h"
  42
  43 #define USES_OWNER                                                       \
  44         if (FSTYPE_MSDOS(tc))                                            \
  45             atf_tc_skip("owner not supported by file system")
  46
  47 static void
  48 owner(const atf_tc_t *tc, const char *mp)
  49 {
  50
  51         USES_OWNER;
  52
  53         FSTEST_ENTER();
  54
  55         rump_pub_lwproc_rfork(RUMP_RFCFDG);
  56         if (rump_sys_setuid(1) == -1)
  57                 atf_tc_fail_errno("setuid");
  58         if (rump_sys_chown(".", 1, -1) != -1 || errno != EPERM)
  59                 atf_tc_fail_errno("chown");
  60         if (rump_sys_chmod(".", 0000) != -1 || errno != EPERM)
  61                 atf_tc_fail_errno("chmod");
  62         rump_pub_lwproc_releaselwp();
  63
  64         if (rump_sys_chown(".", 1, -1) == -1)
  65                 atf_tc_fail_errno("chown");
  66
  67         rump_pub_lwproc_rfork(RUMP_RFCFDG);
  68         if (rump_sys_setuid(1) == -1)
  69                 atf_tc_fail_errno("setuid");
  70         if (rump_sys_chown(".", 1, -1) == -1)
  71                 atf_tc_fail_errno("chown");
  72         if (rump_sys_chmod(".", 0000) == -1)
  73                 atf_tc_fail_errno("chmod");
  74         rump_pub_lwproc_releaselwp();
  75
  76         FSTEST_EXIT();
  77 }
  78
  79 static void
  80 dirperms(const atf_tc_t *tc, const char *mp)
  81 {
  82         char name[] = "dir.test/file.test";
  83         char *dir = dirname(name);
  84         int fd;
  85
  86         if (FSTYPE_SYSVBFS(tc))
  87                 atf_tc_skip("directories not supported by file system");
  88
  89         FSTEST_ENTER();
  90
  91         if (rump_sys_mkdir(dir, 0777) == -1)
  92                 atf_tc_fail_errno("mkdir");
  93
  94         rump_pub_lwproc_rfork(RUMP_RFCFDG);
  95         if (rump_sys_setuid(1) == -1)
  96                 atf_tc_fail_errno("setuid");
  97         if (FSTYPE_ZFS(tc))
  98                 atf_tc_expect_fail("PR kern/47656: Test known to be broken");
  99         if (rump_sys_open(name, O_RDWR|O_CREAT, 0666) != -1 || errno != EACCES)
 100                 atf_tc_fail_errno("open");
 101         rump_pub_lwproc_releaselwp();
 102
 103         if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
 104                 atf_tc_fail_errno("open");
 105         if (rump_sys_close(fd) == -1)
 106                 atf_tc_fail_errno("close");
 107
 108         rump_pub_lwproc_rfork(RUMP_RFCFDG);
 109         if (rump_sys_setuid(1) == -1)
 110                 atf_tc_fail_errno("setuid");
 111         if (rump_sys_unlink(name) != -1 || errno != EACCES)
 112                 atf_tc_fail_errno("unlink");
 113         rump_pub_lwproc_releaselwp();
 114
 115         if (rump_sys_unlink(name) == -1)
 116                 atf_tc_fail_errno("unlink");
 117
 118         if (rump_sys_rmdir(dir) == -1)
 119                 atf_tc_fail_errno("rmdir");
 120
 121         FSTEST_EXIT();
 122 }
 123
 124 static void
 125 times(const atf_tc_t *tc, const char *mp)
 126 {
 127         const char *name = "file.test";
 128         int fd;
 129         unsigned int i, j;
 130         struct timeval tmv[2];
 131         static struct timeval tmvs[] = {
 132                 { QUAD_MIN, 0 },
 133                 { 0, 0 },
 134                 { QUAD_MAX, 999999 }
 135         };
 136
 137         FSTEST_ENTER();
 138
 139         if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
 140                 atf_tc_fail_errno("open");
 141         if (rump_sys_close(fd) == -1)
 142                 atf_tc_fail_errno("close");
 143
 144         rump_pub_lwproc_rfork(RUMP_RFCFDG);
 145         if (rump_sys_setuid(1) == -1)
 146                 atf_tc_fail_errno("setuid");
 147         if (FSTYPE_ZFS(tc))
 148                 atf_tc_expect_fail("PR kern/47656: Test known to be broken");
 149         if (rump_sys_utimes(name, NULL) != -1 || errno != EACCES)
 150                 atf_tc_fail_errno("utimes");
 151         rump_pub_lwproc_releaselwp();
 152
 153         if (rump_sys_utimes(name, NULL) == -1)
 154                 atf_tc_fail_errno("utimes");
 155
 156         for (i = 0; i < sizeof(tmvs) / sizeof(tmvs[0]); i++) {
 157                 for (j = 0; j < sizeof(tmvs) / sizeof(tmvs[0]); j++) {
 158                         tmv[0] = tmvs[i];
 159                         tmv[1] = tmvs[j];
 160                         rump_pub_lwproc_rfork(RUMP_RFCFDG);
 161                         if (rump_sys_setuid(1) == -1)
 162                                 atf_tc_fail_errno("setuid");
 163                         if (rump_sys_utimes(name, tmv) != -1 || errno != EPERM)
 164                                 atf_tc_fail_errno("utimes");
 165                         rump_pub_lwproc_releaselwp();
 166
 167                         if (rump_sys_utimes(name, tmv) == -1)
 168                                 atf_tc_fail_errno("utimes");
 169                 }
 170         }
 171
 172         if (rump_sys_unlink(name) == -1)
 173                 atf_tc_fail_errno("unlink");
 174
 175         FSTEST_EXIT();
 176 }
 177
 178 static void
 179 flags(const atf_tc_t *tc, const char *mp)
 180 {
 181         const char *name = "file.test";
 182         int fd, fflags;
 183         struct stat st;
 184
 185         FSTEST_ENTER();
 186
 187         if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
 188                 atf_tc_fail_errno("open");
 189         if (rump_sys_close(fd) == -1)
 190                 atf_tc_fail_errno("close");
 191
 192         if (rump_sys_stat(name, &st) == -1)
 193                 atf_tc_fail_errno("stat");
 194         if (FSTYPE_ZFS(tc))
 195                 atf_tc_expect_fail("PR kern/47656: Test known to be broken");
 196         if (rump_sys_chflags(name, st.st_flags) == -1) {
 197                 if (errno == EOPNOTSUPP)
 198                         atf_tc_skip("file flags not supported by file system");
 199                 atf_tc_fail_errno("chflags");
 200         }
 201
 202         fflags = st.st_flags | UF_IMMUTABLE;
 203
 204         rump_pub_lwproc_rfork(RUMP_RFCFDG);
 205         if (rump_sys_setuid(1) == -1)
 206                 atf_tc_fail_errno("setuid");
 207         fflags |= UF_IMMUTABLE;
 208         if (rump_sys_chflags(name, fflags) != -1 || errno != EPERM)
 209                 atf_tc_fail_errno("chflags");
 210         rump_pub_lwproc_releaselwp();
 211
 212         if (rump_sys_chflags(name, fflags) == -1)
 213                 atf_tc_fail_errno("chflags");
 214
 215         fflags &= ~UF_IMMUTABLE;
 216         if (rump_sys_chflags(name, fflags) == -1)
 217                 atf_tc_fail_errno("chflags");
 218
 219         if (rump_sys_unlink(name) == -1)
 220                 atf_tc_fail_errno("unlink");
 221
 222         FSTEST_EXIT();
 223 }
 224
 225 ATF_TC_FSAPPLY(owner, "owner unprivileged checks");
 226 ATF_TC_FSAPPLY(dirperms, "directory permission checks");
 227 ATF_TC_FSAPPLY(times, "time set checks");
 228 ATF_TC_FSAPPLY(flags, "file flags checks");
 229
 230 ATF_TP_ADD_TCS(tp)
 231 {
 232
 233         ATF_TP_FSAPPLY(owner);
 234         ATF_TP_FSAPPLY(dirperms);
 235         ATF_TP_FSAPPLY(times);
 236         ATF_TP_FSAPPLY(flags);
 237
 238         return atf_no_error();
 239 }