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122 lines
3.9 KiB
122 lines
3.9 KiB
4 months ago
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/*
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* Check decoding of prctl operations which use arg2 as pointer to an integer
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* value: PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU, and PR_GET_FPEXC.
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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) 2016-2017 The strace developers.
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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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#if defined __NR_prctl
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# include <stdint.h>
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# include <stdio.h>
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# include <unistd.h>
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# include <linux/prctl.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_addr1 =
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(kernel_ulong_t) 0x1e55c0de00000000ULL;
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static const kernel_ulong_t bogus_addr2 =
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(kernel_ulong_t) 0xfffffffffffffffdULL;
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static const kernel_ulong_t bogus_op_bits =
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(kernel_ulong_t) 0xbadc0ded00000000ULL;
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static const struct {
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kernel_ulong_t val;
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const char *str;
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} options[] = {
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{ 37, "PR_GET_CHILD_SUBREAPER" },
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{ 19, "PR_GET_ENDIAN" },
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{ 9, "PR_GET_FPEMU" },
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{ 11, "PR_GET_FPEXC" },
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};
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TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, ptr);
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long rc;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(options); ++i) {
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prctl(options[i].val | bogus_op_bits, 0);
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printf("prctl(%s, NULL) = %s\n", options[i].str, errstr);
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if (bogus_addr1) {
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prctl(options[i].val | bogus_op_bits, bogus_addr1);
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printf("prctl(%s, %#llx) = %s\n", options[i].str,
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(unsigned long long) bogus_addr1, errstr);
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}
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prctl(options[i].val | bogus_op_bits, bogus_addr2);
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printf("prctl(%s, %#llx) = %s\n", options[i].str,
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(unsigned long long) bogus_addr2, errstr);
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prctl(options[i].val | bogus_op_bits, (uintptr_t) (ptr + 1));
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printf("prctl(%s, %p) = %s\n", options[i].str,
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ptr + 1, errstr);
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rc = prctl(options[i].val | bogus_op_bits, (uintptr_t) ptr);
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if (!rc) {
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printf("prctl(%s, [%u]) = %s\n",
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options[i].str, *ptr, errstr);
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} else {
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printf("prctl(%s, %p) = %s\n",
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options[i].str, ptr, errstr);
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}
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if (F8ILL_KULONG_SUPPORTED) {
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kernel_ulong_t bogus_addr3 = f8ill_ptr_to_kulong(ptr);
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prctl(options[i].val | bogus_op_bits, bogus_addr3);
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printf("prctl(%s, %#llx) = %s\n", options[i].str,
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(unsigned long long) bogus_addr3, 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")
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#endif
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