107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
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/*
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* Check decoding of prctl PR_GET_DUMPABLE/PR_SET_DUMPABLE operations.
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*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#include <linux/prctl.h>
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#if defined __NR_prctl && defined PR_GET_DUMPABLE && defined PR_SET_DUMPABLE
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# include <stdio.h>
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# include <unistd.h>
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static const char *errstr;
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static long
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prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
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{
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static const kernel_ulong_t bogus_arg =
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(kernel_ulong_t) 0xdeadbeefbadc0dedULL;
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long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
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errstr = sprintrc(rc);
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return rc;
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}
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int
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main(void)
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{
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static const kernel_ulong_t bogus_dumpable1 =
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(kernel_ulong_t) 0xdeadc0de00000001ULL;
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static const kernel_ulong_t bogus_dumpable2 =
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(kernel_ulong_t) 0xdeadc0defacebeefULL;
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static const char * const args[] = {
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"SUID_DUMP_DISABLE",
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"SUID_DUMP_USER",
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"SUID_DUMP_ROOT",
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};
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unsigned int i;
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prctl(PR_SET_DUMPABLE, 3);
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printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
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errstr);
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prctl(PR_SET_DUMPABLE, bogus_dumpable1);
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if (bogus_dumpable1 == 1) {
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printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
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} else {
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printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
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" = %s\n",
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(unsigned long long) bogus_dumpable1, errstr);
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}
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prctl(PR_SET_DUMPABLE, bogus_dumpable2);
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printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
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(unsigned long long) bogus_dumpable2, errstr);
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for (i = 0; i < ARRAY_SIZE(args); ++i) {
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prctl(PR_SET_DUMPABLE, i);
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printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
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long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
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if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
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printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
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errstr, args[rc]);
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} else {
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printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
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}
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_DUMPABLE && PR_SET_DUMPABLE")
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#endif
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