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/**
* Seccomp Library test program
*
* Copyright (c) 2018 Oracle and/or its affiliates. All rights reserved.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
/*
* This library is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License as
* published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses>.
*/
#include <errno.h>
#include <unistd.h>
#include <stdbool.h>
#include <seccomp.h>
#include "util.h"
int main(int argc, char *argv[])
{
int rc;
struct util_options opts;
scmp_filter_ctx ctx = NULL;
rc = util_getopt(argc, argv, &opts);
if (rc < 0)
goto out;
ctx = seccomp_init(SCMP_ACT_KILL);
if (ctx == NULL)
return ENOMEM;
/* the syscall and argument numbers are all fake to make the test
* simpler */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A0(SCMP_CMP_GE, 1));
if (rc != 0)
goto out;
/* db_chain_lt() path #1 - due to "A1" > "A0" */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A1(SCMP_CMP_GE, 2));
if (rc != 0)
goto out;
/* db_chain_lt() path #2 - due to "GT" > "GE" */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A0(SCMP_CMP_GT, 3));
if (rc != 0)
goto out;
/* db_chain_lt() path #3 - due to the second mask (0xff) being greater
* than the first (0xf) */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A2(SCMP_CMP_MASKED_EQ, 0xf, 4));
if (rc != 0)
goto out;
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A2(SCMP_CMP_MASKED_EQ, 0xff, 5));
if (rc != 0)
goto out;
/* db_chain_lt() path #4 - due to datum (6) > previous datum (5) */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
SCMP_A2(SCMP_CMP_MASKED_EQ, 0xff, 6));
if (rc != 0)
goto out;
/* attempt to hit some of the lvl_prv and lvl_nxt code in db.c */
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 5,
SCMP_A0(SCMP_CMP_NE, 7),
SCMP_A1(SCMP_CMP_LT, 8),
SCMP_A2(SCMP_CMP_EQ, 9),
SCMP_A3(SCMP_CMP_GE, 10),
SCMP_A4(SCMP_CMP_GT, 11),
SCMP_A5(SCMP_CMP_MASKED_EQ, 0xffff, 12));
if (rc != 0)
goto out;
rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 5,
SCMP_A0(SCMP_CMP_NE, 7),
SCMP_A1(SCMP_CMP_LT, 8),
SCMP_A2(SCMP_CMP_EQ, 9),
SCMP_A3(SCMP_CMP_GE, 10),
SCMP_A4(SCMP_CMP_GT, 11),
SCMP_A5(SCMP_CMP_MASKED_EQ, 0xffff, 13));
if (rc != 0)
goto out;
rc = util_filter_output(&opts, ctx);
if (rc)
goto out;
out:
seccomp_release(ctx);
return (rc < 0 ? -rc : rc);
}
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