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/*
* Check decoding of prctl PR_GET_SECUREBITS/PR_SET_SECUREBITS operations.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016-2019 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <linux/prctl.h>
#if defined __NR_prctl && defined PR_GET_SECUREBITS && defined PR_SET_SECUREBITS
# include <stdio.h>
# include <unistd.h>
# include "xlat.h"
# include "xlat/secbits.h"
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 bits1 =
(kernel_ulong_t) 0xdeadc0defacebeefULL;
static const kernel_ulong_t bits2 =
(kernel_ulong_t) 0xbadc0ded00000000ULL;
static const kernel_ulong_t bits3 =
(kernel_ulong_t) 0xffULL;
prctl(PR_SET_SECUREBITS, 0);
printf("prctl(PR_SET_SECUREBITS, 0) = %s\n", errstr);
prctl(PR_SET_SECUREBITS, bits1);
printf("prctl(PR_SET_SECUREBITS, SECBIT_NOROOT|SECBIT_NOROOT_LOCKED|"
"SECBIT_NO_SETUID_FIXUP|SECBIT_NO_SETUID_FIXUP_LOCKED|"
"SECBIT_KEEP_CAPS_LOCKED|SECBIT_NO_CAP_AMBIENT_RAISE|"
"SECBIT_NO_CAP_AMBIENT_RAISE_LOCKED|%#llx) = %s\n",
(unsigned long long) bits1 & ~0xffULL, errstr);
if (bits2) {
prctl(PR_SET_SECUREBITS, bits2);
printf("prctl(PR_SET_SECUREBITS, %#llx /* SECBIT_??? */)"
" = %s\n", (unsigned long long) bits2, errstr);
}
prctl(PR_SET_SECUREBITS, bits3);
printf("prctl(PR_SET_SECUREBITS, SECBIT_NOROOT|SECBIT_NOROOT_LOCKED|"
"SECBIT_NO_SETUID_FIXUP|SECBIT_NO_SETUID_FIXUP_LOCKED|"
"SECBIT_KEEP_CAPS|SECBIT_KEEP_CAPS_LOCKED|"
"SECBIT_NO_CAP_AMBIENT_RAISE|SECBIT_NO_CAP_AMBIENT_RAISE_LOCKED)"
" = %s\n", errstr);
long rc = prctl(PR_GET_SECUREBITS, bits1);
printf("prctl(PR_GET_SECUREBITS) = %s", errstr);
if (rc > 0) {
printf(" (");
printflags(secbits, rc, NULL);
printf(")");
}
puts("");
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_SECUREBITS && PR_SET_SECUREBITS")
#endif
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