/*
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* Check decoding of seccomp SECCOMP_GET_ACTION_AVAIL.
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*
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* Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
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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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#ifdef __NR_seccomp
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# include <stdio.h>
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# include <stdint.h>
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# include <unistd.h>
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# ifdef HAVE_LINUX_SECCOMP_H
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# include <linux/seccomp.h>
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# endif
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# ifndef SECCOMP_GET_ACTION_AVAIL
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# define SECCOMP_GET_ACTION_AVAIL 2
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# endif
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static const char *errstr;
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static long
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k_seccomp(const kernel_ulong_t op, const kernel_ulong_t flags,
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const kernel_ulong_t args)
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{
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const long rc = syscall(__NR_seccomp, op, flags, args);
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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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TAIL_ALLOC_OBJECT_CONST_PTR(uint32_t, act);
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kernel_ulong_t op = (kernel_ulong_t) 0xfacefeed00000000ULL
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| SECCOMP_GET_ACTION_AVAIL;
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kernel_ulong_t flags = (kernel_ulong_t) 0xdeadbeef00000000ULL;
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unsigned int i;
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struct {
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uint32_t val;
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const char *str;
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} actions [] = {
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{ 0, "SECCOMP_RET_KILL_THREAD" },
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# ifdef SECCOMP_RET_KILL_PROCESS
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{ ARG_STR(SECCOMP_RET_KILL_PROCESS) },
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# endif
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# ifdef SECCOMP_RET_TRAP
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{ ARG_STR(SECCOMP_RET_TRAP) },
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# endif
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# ifdef SECCOMP_RET_ERRNO
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{ ARG_STR(SECCOMP_RET_ERRNO) },
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# endif
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# ifdef SECCOMP_RET_TRACE
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{ ARG_STR(SECCOMP_RET_TRACE) },
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# endif
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# ifdef SECCOMP_RET_LOG
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{ ARG_STR(SECCOMP_RET_LOG) },
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# endif
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# ifdef SECCOMP_RET_ALLOW
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{ ARG_STR(SECCOMP_RET_ALLOW) },
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# endif
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{ 0xffffffff, "0xffffffff /* SECCOMP_RET_??? */" }
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};
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for (i = 0; i < ARRAY_SIZE(actions); ++i) {
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*act = actions[i].val;
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k_seccomp(op, flags, (uintptr_t) act);
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printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, [%s]) = %s\n",
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actions[i].str, errstr);
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}
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*act = actions[0].val;
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k_seccomp(op, flags, (uintptr_t) (act + 1));
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printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %p) = %s\n",
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act + 1, errstr);
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if (F8ILL_KULONG_SUPPORTED) {
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k_seccomp(op, flags, f8ill_ptr_to_kulong(act));
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printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %#jx) = %s\n",
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(uintmax_t) f8ill_ptr_to_kulong(act), errstr);
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}
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flags |= 0xcafef00d;
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k_seccomp(op, flags, 0);
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printf("seccomp(SECCOMP_GET_ACTION_AVAIL, %u, NULL) = %s\n",
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(unsigned int) flags, errstr);
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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_seccomp")
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#endif
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