From a2c0cbc0d6b49ef227abd3b8c4ee7bfaaed78e3f Mon Sep 17 00:00:00 2001 From: Eugene Syromyatnikov Date: Sat, 10 Dec 2016 07:03:54 +0300 Subject: [PATCH] tests: check decoding of a subset of prctl operations Check decoding of prctl operations that take the second syscall argument as a pointer to an integer. * tests/prctl-arg2-intptr.c: New file. * tests/prctl-arg2-intptr.test: New test. * tests/.gitignore: Add prctl-arg2-intptr. * tests/Makefile.am (check_PROGRAMS): Likewise. (DECODER_TESTS): Add prctl-arg2-intptr.test. --- tests/.gitignore | 1 + tests/Makefile.am | 2 + tests/prctl-arg2-intptr.c | 120 +++++++++++++++++++++++++++++++++++ tests/prctl-arg2-intptr.test | 13 ++++ 4 files changed, 136 insertions(+) create mode 100644 tests/prctl-arg2-intptr.c create mode 100755 tests/prctl-arg2-intptr.test diff --git a/tests/.gitignore b/tests/.gitignore index 2f2c5d9e..abc26bea 100644 --- a/tests/.gitignore +++ b/tests/.gitignore @@ -210,6 +210,7 @@ pkey_free pkey_mprotect poll ppoll +prctl-arg2-intptr prctl-dumpable prctl-name prctl-no-args diff --git a/tests/Makefile.am b/tests/Makefile.am index 793a0dc9..d1c2670a 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -270,6 +270,7 @@ check_PROGRAMS = \ pkey_mprotect \ poll \ ppoll \ + prctl-arg2-intptr \ prctl-dumpable \ prctl-name \ prctl-no-args \ @@ -656,6 +657,7 @@ DECODER_TESTS = \ pkey_mprotect.test \ poll.test \ ppoll.test \ + prctl-arg2-intptr.test \ prctl-dumpable.test \ prctl-name.test \ prctl-no-args.test \ diff --git a/tests/prctl-arg2-intptr.c b/tests/prctl-arg2-intptr.c new file mode 100644 index 00000000..ee000ebe --- /dev/null +++ b/tests/prctl-arg2-intptr.c @@ -0,0 +1,120 @@ +/* + * 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 + * Copyright (c) 2016 Dmitry V. Levin + * 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 + +#if defined __NR_prctl + +# include +# include +# include +# include + +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" }, + }; + + unsigned int *ptr = tail_alloc(sizeof(*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 diff --git a/tests/prctl-arg2-intptr.test b/tests/prctl-arg2-intptr.test new file mode 100755 index 00000000..500399a7 --- /dev/null +++ b/tests/prctl-arg2-intptr.test @@ -0,0 +1,13 @@ +#!/bin/sh + +# Check decoding of prctl PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU, +# and PR_GET_FPEXC operations. +. "${srcdir=.}/init.sh" + +check_prog grep +run_prog > /dev/null +run_strace -a25 -eprctl $args > "$EXP" +grep -v '^prctl(PR_[GS]ET_[^CEF][^HNP][^DEI]' < "$LOG" > "$OUT" +match_diff "$OUT" "$EXP" + +rm -f "$EXP" "$OUT" -- 2.50.1