Dmitry V. Levin
c6782f144a
strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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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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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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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&& !defined __ia64__
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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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" && !__ia64__")
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#endif
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