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>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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32 #include <asm/unistd.h>
33 #include <linux/prctl.h>
35 #if defined __NR_prctl && defined PR_GET_DUMPABLE && defined PR_SET_DUMPABLE
40 static const char *errstr;
43 prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
45 static const kernel_ulong_t bogus_arg =
46 (kernel_ulong_t) 0xdeadbeefbadc0dedULL;
47 long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
48 errstr = sprintrc(rc);
55 static const kernel_ulong_t bogus_dumpable1 =
56 (kernel_ulong_t) 0xdeadc0de00000001ULL;
57 static const kernel_ulong_t bogus_dumpable2 =
58 (kernel_ulong_t) 0xdeadc0defacebeefULL;
60 static const char * const args[] = {
68 prctl(PR_SET_DUMPABLE, 3);
69 printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
72 prctl(PR_SET_DUMPABLE, bogus_dumpable1);
73 if (bogus_dumpable1 == 1) {
74 printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
76 printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
78 (unsigned long long) bogus_dumpable1, errstr);
81 prctl(PR_SET_DUMPABLE, bogus_dumpable2);
82 printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
83 (unsigned long long) bogus_dumpable2, errstr);
85 for (i = 0; i < ARRAY_SIZE(args); ++i) {
86 prctl(PR_SET_DUMPABLE, i);
87 printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
89 long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
90 if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
91 printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
94 printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
98 puts("+++ exited with 0 +++");
104 SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_DUMPABLE && PR_SET_DUMPABLE")