blob: c06f05aad905bc55330fb7cb7584e55f90b21517 [file] [log] [blame]
/*
* Check how seccomp SECCOMP_SET_MODE_STRICT is decoded.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* 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 <sys/syscall.h>
#if defined __NR_seccomp && defined __NR_exit
# include <assert.h>
# include <errno.h>
# include <stdio.h>
# include <unistd.h>
int
main(void)
{
static const char text1[] =
"seccomp(SECCOMP_SET_MODE_STRICT, 0, NULL) = 0\n";
static const char text2[] = "+++ exited with 0 +++\n";
const unsigned long addr = (unsigned long) 0xfacefeeddeadbeef;
long rc;
rc = syscall(__NR_seccomp, -1L, -1L, addr);
printf("seccomp(%#x /* SECCOMP_SET_MODE_??? */, %u, %#lx)"
" = %ld %s (%m)\n", -1, -1, addr, rc, errno2name());
fflush(stdout);
rc = syscall(__NR_seccomp, 0, 0, 0);
if (rc) {
printf("seccomp(SECCOMP_SET_MODE_STRICT, 0, NULL)"
" = %ld %s (%m)\n", rc, errno2name());
fflush(stdout);
rc = 0;
} else {
/*
* If kernel implementaton of SECCOMP_MODE_STRICT is buggy,
* the following syscall will result to SIGKILL.
*/
rc = write(1, text1, LENGTH_OF(text1)) != LENGTH_OF(text1);
}
rc += write(1, text2, LENGTH_OF(text2)) != LENGTH_OF(text2);
return !!syscall(__NR_exit, rc);
}
#else
SKIP_MAIN_UNDEFINED("__NR_seccomp && __NR_exit")
#endif