tools/regression/priv/priv_proc_setrlimit.c

   1 /*-
   2  * Copyright (c) 2006 nCircle Network Security, Inc.
   3  * Copyright (c) 2007 Robert N. M. Watson
   4  * All rights reserved.
   5  *
   6  * This software was developed by Robert N. M. Watson for the TrustedBSD
   7  * Project under contract to nCircle Network Security, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
  22  * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  24  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * $FreeBSD$
  31  */
  32
  33 /*-
  34  * Test that raising current resource limits above hard resource limits
  35  * requires privilege.  We test three cases:
  36  *
  37  * - Raise the current above the maximum (privileged).
  38  * - Raise the current to the maximum (unprivileged).
  39  * - Raise the maximum (privileged).
  40  */
  41
  42 #include <sys/types.h>
  43 #include <sys/time.h>
  44 #include <sys/resource.h>
  45
  46 #include <err.h>
  47 #include <errno.h>
  48 #include <unistd.h>
  49
  50 #include "main.h"
  51
  52 static int initialized;
  53 static struct rlimit rl_base;
  54 static struct rlimit rl_lowered;
  55
  56 int
  57 priv_proc_setrlimit_setup(int asroot, int injail, struct test *test)
  58 {
  59
  60         if (getrlimit(RLIMIT_DATA, &rl_base) < 0) {
  61                 warn("priv_proc_setrlimit_setup: getrlimit");
  62                 return (-1);
  63         }
  64
  65         /*
  66          * Must lower current and limit to make sure there's room to try to
  67          * raise them during tests.  Set current lower than max so we can
  68          * raise it later also.
  69          */
  70         rl_lowered = rl_base;
  71         rl_lowered.rlim_cur -= 20;
  72         rl_lowered.rlim_max -= 10;
  73         if (setrlimit(RLIMIT_DATA, &rl_lowered) < 0) {
  74                 warn("priv_proc_setrlimit_setup: setrlimit");
  75                 return (-1);
  76         }
  77         initialized = 1;
  78         return (0);
  79 }
  80
  81 /*
  82  * Try increasing the maximum limits on the process, which requires
  83  * privilege.
  84  */
  85 void
  86 priv_proc_setrlimit_raisemax(int asroot, int injail, struct test *test)
  87 {
  88         struct rlimit rl;
  89         int error;
  90
  91         rl = rl_lowered;
  92         rl.rlim_max = rl_base.rlim_max;
  93         error = setrlimit(RLIMIT_DATA, &rl);
  94         if (asroot && injail)
  95                 expect("priv_proc_setrlimit_raisemax(asroot, injail)", error,
  96                     0, 0);
  97         if (asroot && !injail)
  98                 expect("priv_proc_setrlimit_raisemax(asroot, !injail)",
  99                     error, 0, 0);
 100         if (!asroot && injail)
 101                 expect("priv_proc_setrlimit_raisemax(!asroot, injail)",
 102                     error, -1, EPERM);
 103         if (!asroot && !injail)
 104                 expect("priv_proc_setrlimit_raisemax(!asroot, !injail)",
 105                     error, -1, EPERM);
 106 }
 107
 108 /*
 109  * Try setting the current limit to the current maximum, which is allowed
 110  * without privilege.
 111  */
 112 void
 113 priv_proc_setrlimit_raisecur_nopriv(int asroot, int injail,
 114     struct test *test)
 115 {
 116         struct rlimit rl;
 117         int error;
 118
 119         rl = rl_lowered;
 120         rl.rlim_cur = rl.rlim_max;
 121         error = setrlimit(RLIMIT_DATA, &rl);
 122         if (asroot && injail)
 123                 expect("priv_proc_setrlimit_raiscur_nopriv(asroot, injail)",
 124                     error, 0, 0);
 125         if (asroot && !injail)
 126                 expect("priv_proc_setrlimit_raisecur_nopriv(asroot, !injail)",
 127                     error, 0, 0);
 128         if (!asroot && injail)
 129                 expect("priv_proc_setrlimit_raisecur_nopriv(!asroot, injail)",
 130                     error, 0, 0);
 131         if (!asroot && !injail)
 132                 expect("priv_proc_setrlimit_raisecur_nopriv(!asroot, !injail)",
 133                     error, 0, 0);
 134 }
 135
 136 /*
 137  * Try raising the current limits above the maximum, which requires
 138  * privilege.
 139  */
 140 void
 141 priv_proc_setrlimit_raisecur(int asroot, int injail, struct test *test)
 142 {
 143         struct rlimit rl;
 144         int error;
 145
 146         rl = rl_lowered;
 147         rl.rlim_cur = rl.rlim_max + 10;
 148         error = setrlimit(RLIMIT_DATA, &rl);
 149         if (asroot && injail)
 150                 expect("priv_proc_setrlimit_raisecur(asroot, injail)", error,
 151                     0, 0);
 152         if (asroot && !injail)
 153                 expect("priv_proc_setrlimit_raisecur(asroot, !injail)",
 154                     error, 0, 0);
 155         if (!asroot && injail)
 156                 expect("priv_proc_setrlimit_raisecur(!asroot, injail)",
 157                     error, -1, EPERM);
 158         if (!asroot && !injail)
 159                 expect("priv_proc_setrlimit_raisecur(!asroot, !injail)",
 160                     error, -1, EPERM);
 161 }
 162
 163 void
 164 priv_proc_setrlimit_cleanup(int asroot, int injail, struct test *test)
 165 {
 166
 167         if (initialized)
 168                 (void)setrlimit(RLIMIT_DATA, &rl_base);
 169         initialized = 0;
 170 }