|
Packit Service |
8eee21 |
/**
|
|
Packit Service |
8eee21 |
* Seccomp Library test program
|
|
Packit Service |
8eee21 |
*
|
|
Packit Service |
8eee21 |
* Copyright (c) 2019 Oracle and/or its affiliates. All rights reserved.
|
|
Packit Service |
8eee21 |
* Author: Tom Hromatka <tom.hromatka@oracle.com>
|
|
Packit Service |
8eee21 |
*/
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
/*
|
|
Packit Service |
8eee21 |
* This library is free software; you can redistribute it and/or modify it
|
|
Packit Service |
8eee21 |
* under the terms of version 2.1 of the GNU Lesser General Public License as
|
|
Packit Service |
8eee21 |
* published by the Free Software Foundation.
|
|
Packit Service |
8eee21 |
*
|
|
Packit Service |
8eee21 |
* This library is distributed in the hope that it will be useful, but WITHOUT
|
|
Packit Service |
8eee21 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
Packit Service |
8eee21 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
|
|
Packit Service |
8eee21 |
* for more details.
|
|
Packit Service |
8eee21 |
*
|
|
Packit Service |
8eee21 |
* You should have received a copy of the GNU Lesser General Public License
|
|
Packit Service |
8eee21 |
* along with this library; if not, see <http://www.gnu.org/licenses>.
|
|
Packit Service |
8eee21 |
*/
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
#include <errno.h>
|
|
Packit Service |
8eee21 |
#include <unistd.h>
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
#include <seccomp.h>
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
#include "util.h"
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
int main(int argc, char *argv[])
|
|
Packit Service |
8eee21 |
{
|
|
Packit Service |
8eee21 |
int rc;
|
|
Packit Service |
8eee21 |
struct util_options opts;
|
|
Packit Service |
8eee21 |
scmp_filter_ctx ctx = NULL;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = util_getopt(argc, argv, &opts);
|
|
Packit Service |
8eee21 |
if (rc < 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = seccomp_api_set(1);
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
return -rc;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
ctx = seccomp_init(SCMP_ACT_ERRNO(100));
|
|
Packit Service |
8eee21 |
if (ctx == NULL)
|
|
Packit Service |
8eee21 |
return ENOMEM;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = seccomp_arch_remove(ctx, SCMP_ARCH_NATIVE);
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
rc = seccomp_arch_add(ctx, SCMP_ARCH_X86_64);
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
/* libseccomp utilizes a hash table to manage BPF blocks. It
|
|
Packit Service |
8eee21 |
* currently employs MurmurHash3 where the key is the hashed values
|
|
Packit Service |
8eee21 |
* of the BPF instruction blocks, the accumulator start, and the
|
|
Packit Service |
8eee21 |
* accumulator end. Changes to the hash algorithm will likely affect
|
|
Packit Service |
8eee21 |
* this test.
|
|
Packit Service |
8eee21 |
*/
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
/* The following rules were derived from an issue reported by Tor:
|
|
Packit Service |
8eee21 |
* https://github.com/seccomp/libseccomp/issues/148
|
|
Packit Service |
8eee21 |
*
|
|
Packit Service |
8eee21 |
* In the steps below, syscall 1001 is configured similarly to how
|
|
Packit Service |
8eee21 |
* Tor configured socket. The fairly complex rules below led to
|
|
Packit Service |
8eee21 |
* a hash collision with rt_sigaction (syscall 1000) in this test.
|
|
Packit Service |
8eee21 |
*/
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, 1001, 3,
|
|
Packit Service |
8eee21 |
SCMP_A0(SCMP_CMP_EQ, 1),
|
|
Packit Service |
8eee21 |
SCMP_A1(SCMP_CMP_MASKED_EQ, 0xf, 2),
|
|
Packit Service |
8eee21 |
SCMP_A2(SCMP_CMP_EQ, 3));
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, 1001, 2,
|
|
Packit Service |
8eee21 |
SCMP_A0(SCMP_CMP_EQ, 1),
|
|
Packit Service |
8eee21 |
SCMP_A1(SCMP_CMP_MASKED_EQ, 0xf, 1));
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, 1000, 1,
|
|
Packit Service |
8eee21 |
SCMP_A0(SCMP_CMP_EQ, 2));
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, 1000, 1,
|
|
Packit Service |
8eee21 |
SCMP_A0(SCMP_CMP_EQ, 1));
|
|
Packit Service |
8eee21 |
if (rc != 0)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
rc = util_filter_output(&opts, ctx);
|
|
Packit Service |
8eee21 |
if (rc)
|
|
Packit Service |
8eee21 |
goto out;
|
|
Packit Service |
8eee21 |
|
|
Packit Service |
8eee21 |
out:
|
|
Packit Service |
8eee21 |
seccomp_release(ctx);
|
|
Packit Service |
8eee21 |
return (rc < 0 ? -rc : rc);
|
|
Packit Service |
8eee21 |
}
|