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121 lines
3.9 KiB
121 lines
3.9 KiB
/* |
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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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