2 * Check decoding of prctl PR_GET_DUMPABLE/PR_SET_DUMPABLE operations.
4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
6 * Copyright (c) 2016-2018 The strace developers.
9 * SPDX-License-Identifier: GPL-2.0-or-later
13 #include <asm/unistd.h>
14 #include <linux/prctl.h>
16 #if defined __NR_prctl && defined PR_GET_DUMPABLE && defined PR_SET_DUMPABLE \
22 static const char *errstr;
25 prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
27 static const kernel_ulong_t bogus_arg =
28 (kernel_ulong_t) 0xdeadbeefbadc0dedULL;
29 long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
30 errstr = sprintrc(rc);
37 static const kernel_ulong_t bogus_dumpable1 =
38 (kernel_ulong_t) 0xdeadc0de00000001ULL;
39 static const kernel_ulong_t bogus_dumpable2 =
40 (kernel_ulong_t) 0xdeadc0defacebeefULL;
42 static const char * const args[] = {
50 prctl(PR_SET_DUMPABLE, 3);
51 printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
54 prctl(PR_SET_DUMPABLE, bogus_dumpable1);
55 if (bogus_dumpable1 == 1) {
56 printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
58 printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
60 (unsigned long long) bogus_dumpable1, errstr);
63 prctl(PR_SET_DUMPABLE, bogus_dumpable2);
64 printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
65 (unsigned long long) bogus_dumpable2, errstr);
67 for (i = 0; i < ARRAY_SIZE(args); ++i) {
68 prctl(PR_SET_DUMPABLE, i);
69 printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
71 long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
72 if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
73 printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
76 printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
80 puts("+++ exited with 0 +++");
86 SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_DUMPABLE && PR_SET_DUMPABLE"