207 lines
6.4 KiB
C
207 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
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*/
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/*\
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* [Description]
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*
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* - EINVAL when an invalid value is given for option
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* - EINVAL when option is PR_SET_PDEATHSIG & arg2 is not zero or a valid
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* signal number
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* - EINVAL when option is PR_SET_DUMPABLE & arg2 is neither
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* SUID_DUMP_DISABLE nor SUID_DUMP_USER
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* - EFAULT when arg2 is an invalid address
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* - EFAULT when option is PR_SET_SECCOMP & arg2 is SECCOMP_MODE_FILTER &
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* arg3 is an invalid address
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* - EACCES when option is PR_SET_SECCOMP & arg2 is SECCOMP_MODE_FILTER &
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* the process does not have the CAP_SYS_ADMIN capability
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* - EINVAL when option is PR_SET_TIMING & arg2 is not PR_TIMING_STATISTICAL
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* - EINVAL when option is PR_SET_NO_NEW_PRIVS & arg2 is not equal to 1 &
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* arg3 is zero
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* - EINVAL when option is PR_SET_NO_NEW_PRIVS & arg2 is equal to 1 & arg3
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* is nonzero
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* - EINVAL when options is PR_GET_NO_NEW_PRIVS & arg2, arg3, arg4, or arg5
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* is nonzero
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* - EINVAL when options is PR_SET_THP_DISABLE & arg3, arg4, arg5 is non-zero.
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* - EINVAL when options is PR_GET_THP_DISABLE & arg2, arg3, arg4, or arg5 is
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* nonzero
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* - EINVAL when options is PR_CAP_AMBIENT & arg2 has an invalid value
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* - EINVAL when options is PR_CAP_AMBIENT & an unused argument such as arg4,
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* arg5, or, in the case of PR_CAP_AMBIENT_CLEAR_ALL, arg3 is nonzero
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* - EINVAL when options is PR_CAP_AMBIENT & arg2 is PR_CAP_AMBIENT_LOWER,
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* PR_CAP_AMBIENT_RAISE, or PR_CAP_AMBIENT_IS_SET and arg3 does not specify
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* a valid capability
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* - EINVAL when option is PR_GET_SPECULATION_CTRL and unused arguments is
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* nonzero
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* - EPERM when option is PR_SET_SECUREBITS and the caller does not have the
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* CAP_SETPCAP capability
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* - EPERM when option is PR_CAPBSET_DROP and the caller does not have the
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* CAP_SETPCAP capability
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*/
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#include <errno.h>
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#include <signal.h>
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#include <sys/prctl.h>
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#include <linux/filter.h>
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#include <linux/capability.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <limits.h>
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#include "config.h"
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#include "lapi/prctl.h"
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#include "lapi/seccomp.h"
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#include "lapi/syscalls.h"
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#include "tst_test.h"
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#include "tst_capability.h"
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#define OPTION_INVALID 999
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#define unsup_string "prctl() doesn't support this option, skip it"
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static const struct sock_filter strict_filter[] = {
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BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ALLOW)
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};
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static const struct sock_fprog strict = {
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.len = (unsigned short)ARRAY_SIZE(strict_filter),
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.filter = (struct sock_filter *)strict_filter
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};
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static unsigned long strict_addr = (unsigned long)&strict;
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static unsigned long bad_addr;
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static unsigned long num_0;
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static unsigned long num_1 = 1;
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static unsigned long num_2 = 2;
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static unsigned long num_PR_CAP_AMBIENT_CLEAR_ALL = PR_CAP_AMBIENT_CLEAR_ALL;
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static unsigned long num_PR_CAP_AMBIENT_IS_SET = PR_CAP_AMBIENT_IS_SET;
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static unsigned long num_invalid = ULONG_MAX;
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static int seccomp_nsup;
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static int nonewprivs_nsup;
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static int thpdisable_nsup;
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static int capambient_nsup;
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static int speculationctrl_nsup;
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static struct tcase {
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int option;
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unsigned long *arg2;
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unsigned long *arg3;
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int exp_errno;
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char *tname;
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} tcases[] = {
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{OPTION_INVALID, &num_1, &num_0, EINVAL, "invalid option"},
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{PR_SET_PDEATHSIG, &num_invalid, &num_0, EINVAL, "PR_SET_PDEATHSIG"},
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{PR_SET_DUMPABLE, &num_2, &num_0, EINVAL, "PR_SET_DUMPABLE"},
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{PR_SET_NAME, &bad_addr, &num_0, EFAULT, "PR_SET_NAME"},
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{PR_SET_SECCOMP, &num_2, &bad_addr, EFAULT, "PR_SET_SECCOMP"},
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{PR_SET_SECCOMP, &num_2, &strict_addr, EACCES, "PR_SET_SECCOMP"},
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{PR_SET_TIMING, &num_1, &num_0, EINVAL, "PR_SET_TIMING"},
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{PR_SET_NO_NEW_PRIVS, &num_0, &num_0, EINVAL, "PR_SET_NO_NEW_PRIVS"},
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{PR_SET_NO_NEW_PRIVS, &num_1, &num_1, EINVAL, "PR_SET_NO_NEW_PRIVS"},
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{PR_GET_NO_NEW_PRIVS, &num_1, &num_0, EINVAL, "PR_GET_NO_NEW_PRIVS"},
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{PR_SET_THP_DISABLE, &num_0, &num_1, EINVAL, "PR_SET_THP_DISABLE"},
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{PR_GET_THP_DISABLE, &num_1, &num_1, EINVAL, "PR_GET_THP_DISABLE"},
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{PR_CAP_AMBIENT, &num_invalid, &num_0, EINVAL, "PR_CAP_AMBIENT"},
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{PR_CAP_AMBIENT, &num_PR_CAP_AMBIENT_CLEAR_ALL, &num_1, EINVAL, "PR_CAP_AMBIENT"},
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{PR_CAP_AMBIENT, &num_PR_CAP_AMBIENT_IS_SET, &num_invalid, EINVAL, "PR_CAP_AMBIENT"},
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{PR_GET_SPECULATION_CTRL, &num_0, &num_invalid, EINVAL, "PR_GET_SPECULATION_CTRL"},
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{PR_SET_SECUREBITS, &num_0, &num_0, EPERM, "PR_SET_SECUREBITS"},
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{PR_CAPBSET_DROP, &num_1, &num_0, EPERM, "PR_CAPBSET_DROP"},
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};
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static void verify_prctl(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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tst_res(TINFO, "Test #%d: %s", n, tc->tname);
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switch (tc->option) {
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case PR_SET_SECCOMP:
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if (seccomp_nsup) {
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tst_res(TCONF, "%s", unsup_string);
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return;
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}
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break;
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case PR_GET_NO_NEW_PRIVS:
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case PR_SET_NO_NEW_PRIVS:
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if (nonewprivs_nsup) {
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tst_res(TCONF, "%s", unsup_string);
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return;
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}
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break;
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case PR_SET_THP_DISABLE:
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case PR_GET_THP_DISABLE:
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if (thpdisable_nsup) {
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tst_res(TCONF, "%s", unsup_string);
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return;
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}
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break;
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case PR_CAP_AMBIENT:
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if (capambient_nsup) {
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tst_res(TCONF, "%s", unsup_string);
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return;
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}
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break;
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case PR_GET_SPECULATION_CTRL:
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if (speculationctrl_nsup) {
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tst_res(TCONF, "%s", unsup_string);
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return;
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}
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break;
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default:
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break;
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}
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TEST(prctl(tc->option, *tc->arg2, *tc->arg3, 0, 0));
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if (TST_RET == 0) {
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tst_res(TFAIL, "prctl() succeeded unexpectedly");
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return;
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}
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if (tc->exp_errno == TST_ERR) {
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tst_res(TPASS | TTERRNO, "prctl() failed as expected");
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} else {
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if (tc->option == PR_SET_SECCOMP && TST_ERR == EINVAL)
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tst_res(TCONF, "current system was not built with CONFIG_SECCOMP_FILTER.");
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else
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tst_res(TFAIL | TTERRNO, "prctl() failed unexpectedly, expected %s",
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tst_strerrno(tc->exp_errno));
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}
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}
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static void setup(void)
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{
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bad_addr = (unsigned long)tst_get_bad_addr(NULL);
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TEST(prctl(PR_GET_SECCOMP));
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if (TST_ERR == EINVAL)
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seccomp_nsup = 1;
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TEST(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0));
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if (TST_ERR == EINVAL)
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nonewprivs_nsup = 1;
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TEST(prctl(PR_GET_THP_DISABLE, 0, 0, 0, 0));
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if (TST_ERR == EINVAL)
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thpdisable_nsup = 1;
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TEST(prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0));
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if (TST_ERR == EINVAL)
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capambient_nsup = 1;
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TEST(prctl(PR_GET_SPECULATION_CTRL, 0, 0, 0, 0));
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if (TST_ERR == EINVAL)
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speculationctrl_nsup = 1;
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}
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static struct tst_test test = {
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.setup = setup,
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.tcnt = ARRAY_SIZE(tcases),
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.test = verify_prctl,
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.caps = (struct tst_cap []) {
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TST_CAP(TST_CAP_DROP, CAP_SYS_ADMIN),
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TST_CAP(TST_CAP_DROP, CAP_SETPCAP),
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{}
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},
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};
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