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/*
* Check decoding of prctl PR_GET_DUMPABLE/PR_SET_DUMPABLE operations.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 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 __ia64__
# include <stdio.h>
# include <unistd.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 bogus_dumpable1 =
(kernel_ulong_t) 0xdeadc0de00000001ULL;
static const kernel_ulong_t bogus_dumpable2 =
(kernel_ulong_t) 0xdeadc0defacebeefULL;
static const char * const args[] = {
"SUID_DUMP_DISABLE",
"SUID_DUMP_USER",
"SUID_DUMP_ROOT",
};
prctl_marker();
prctl(PR_SET_DUMPABLE, 3);
printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
errstr);
prctl(PR_SET_DUMPABLE, bogus_dumpable1);
if (bogus_dumpable1 == 1) {
printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
} else {
printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
" = %s\n",
(unsigned long long) bogus_dumpable1, errstr);
}
prctl(PR_SET_DUMPABLE, bogus_dumpable2);
printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
(unsigned long long) bogus_dumpable2, errstr);
for (unsigned int i = 0; i < ARRAY_SIZE(args); ++i) {
prctl(PR_SET_DUMPABLE, i);
printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
errstr, args[rc]);
} else {
printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
}
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("!__ia64__")
#endif
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