| /* |
| * Check decoding of prctl operations which use arg2 as pointer to an integer |
| * value: PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU, and PR_GET_FPEXC. |
| * |
| * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com> |
| * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> |
| * Copyright (c) 2016-2017 The strace developers. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "tests.h" |
| #include <asm/unistd.h> |
| |
| #if defined __NR_prctl |
| |
| # include <stdint.h> |
| # include <stdio.h> |
| # include <unistd.h> |
| # include <linux/prctl.h> |
| |
| static const char *errstr; |
| |
| static long |
| prctl(kernel_ulong_t arg1, kernel_ulong_t arg2) |
| { |
| static const kernel_ulong_t bogus_arg = |
| (kernel_ulong_t) 0xdeadbeefbadc0dedULL; |
| long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg); |
| errstr = sprintrc(rc); |
| return rc; |
| } |
| |
| int |
| main(void) |
| { |
| static const kernel_ulong_t bogus_addr1 = |
| (kernel_ulong_t) 0x1e55c0de00000000ULL; |
| static const kernel_ulong_t bogus_addr2 = |
| (kernel_ulong_t) 0xfffffffffffffffdULL; |
| static const kernel_ulong_t bogus_op_bits = |
| (kernel_ulong_t) 0xbadc0ded00000000ULL; |
| static const struct { |
| kernel_ulong_t val; |
| const char *str; |
| } options[] = { |
| { 37, "PR_GET_CHILD_SUBREAPER" }, |
| { 19, "PR_GET_ENDIAN" }, |
| { 9, "PR_GET_FPEMU" }, |
| { 11, "PR_GET_FPEXC" }, |
| }; |
| |
| TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, ptr); |
| long rc; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(options); ++i) { |
| prctl(options[i].val | bogus_op_bits, 0); |
| printf("prctl(%s, NULL) = %s\n", options[i].str, errstr); |
| |
| if (bogus_addr1) { |
| prctl(options[i].val | bogus_op_bits, bogus_addr1); |
| printf("prctl(%s, %#llx) = %s\n", options[i].str, |
| (unsigned long long) bogus_addr1, errstr); |
| } |
| |
| prctl(options[i].val | bogus_op_bits, bogus_addr2); |
| printf("prctl(%s, %#llx) = %s\n", options[i].str, |
| (unsigned long long) bogus_addr2, errstr); |
| |
| prctl(options[i].val | bogus_op_bits, (uintptr_t) (ptr + 1)); |
| printf("prctl(%s, %p) = %s\n", options[i].str, |
| ptr + 1, errstr); |
| |
| rc = prctl(options[i].val | bogus_op_bits, (uintptr_t) ptr); |
| if (!rc) { |
| printf("prctl(%s, [%u]) = %s\n", |
| options[i].str, *ptr, errstr); |
| } else { |
| printf("prctl(%s, %p) = %s\n", |
| options[i].str, ptr, errstr); |
| } |
| |
| if (F8ILL_KULONG_SUPPORTED) { |
| kernel_ulong_t bogus_addr3 = f8ill_ptr_to_kulong(ptr); |
| prctl(options[i].val | bogus_op_bits, bogus_addr3); |
| printf("prctl(%s, %#llx) = %s\n", options[i].str, |
| (unsigned long long) bogus_addr3, errstr); |
| } |
| } |
| |
| puts("+++ exited with 0 +++"); |
| return 0; |
| } |
| |
| #else |
| |
| SKIP_MAIN_UNDEFINED("__NR_prctl") |
| |
| #endif |