mirror of
https://github.com/opnsense/src.git
synced 2026-04-22 23:02:02 -04:00
761d9162d2
Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D41979 MFC after: 1 week (cherry picked from commit b67c0ba4613861f8245ce835081311aef1c19bae)
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 2023 The FreeBSD Foundation
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* This software were developed by Konstantin Belousov <kib@FreeBSD.org>
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <atf-c.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <stdatomic.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
|
|
static sig_atomic_t sigsys_cnt;
|
|
|
|
#define SAVEDVALUE "savedsignosys"
|
|
|
|
static void
|
|
sigsys_handler(int signo, siginfo_t *si, void *ucp)
|
|
{
|
|
sigsys_cnt++;
|
|
}
|
|
|
|
static void
|
|
sigsys_test(int knob)
|
|
{
|
|
struct sigaction sa;
|
|
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_sigaction = sigsys_handler;
|
|
sa.sa_flags = SA_SIGINFO;
|
|
ATF_REQUIRE(sigaction(SIGSYS, &sa, NULL) == 0);
|
|
|
|
ATF_REQUIRE(syscall(273) == -1); /* reserved */
|
|
ATF_CHECK_ERRNO(ENOSYS, true);
|
|
atomic_signal_fence(memory_order_seq_cst);
|
|
ATF_CHECK_EQ(1 * knob, sigsys_cnt * knob);
|
|
|
|
ATF_REQUIRE(syscall(440) == -1); /* SYS_kse_switchin */
|
|
ATF_CHECK_ERRNO(ENOSYS, true);
|
|
atomic_signal_fence(memory_order_seq_cst);
|
|
ATF_CHECK_EQ(2 * knob, sigsys_cnt * knob);
|
|
|
|
/* Hope this is enough for say next two months */
|
|
ATF_REQUIRE(syscall(3000000) == -1);
|
|
ATF_CHECK_ERRNO(ENOSYS, true);
|
|
atomic_signal_fence(memory_order_seq_cst);
|
|
ATF_CHECK_EQ(3 * knob, sigsys_cnt * knob);
|
|
|
|
ATF_REQUIRE(syscall(SYS_afs3_syscall) == -1);
|
|
ATF_CHECK_ERRNO(ENOSYS, true);
|
|
atomic_signal_fence(memory_order_seq_cst);
|
|
ATF_CHECK_EQ(4 * knob, sigsys_cnt * knob);
|
|
}
|
|
|
|
static void
|
|
sysctlset(const char *name, int val)
|
|
{
|
|
size_t oldlen;
|
|
int oldval;
|
|
char buf[80];
|
|
|
|
ATF_REQUIRE(sysctlbyname(name, &oldval, &oldlen, NULL, 0) == 0);
|
|
|
|
/* Store old %name in a symlink for cleanup */
|
|
snprintf(buf, sizeof(buf), "%d", oldval);
|
|
ATF_REQUIRE(symlink(buf, SAVEDVALUE) == 0);
|
|
|
|
ATF_REQUIRE(sysctlbyname(name, NULL, NULL, &val, sizeof(val)) == 0);
|
|
}
|
|
|
|
static void
|
|
sysctlcleanup(const char *name)
|
|
{
|
|
size_t oldlen;
|
|
int n, oldval;
|
|
char buf[80];
|
|
|
|
if ((n = readlink(SAVEDVALUE, buf, sizeof(buf))) > 0) {
|
|
buf[MIN((size_t)n, sizeof(buf) - 1)] = '\0';
|
|
if (sscanf(buf, "%d", &oldval) == 1) {
|
|
oldlen = sizeof(oldval);
|
|
(void)sysctlbyname(name, NULL, 0,
|
|
&oldval, oldlen);
|
|
}
|
|
}
|
|
(void)unlink(SAVEDVALUE);
|
|
}
|
|
|
|
ATF_TC_WITH_CLEANUP(sigsys_test_on);
|
|
ATF_TC_HEAD(sigsys_test_on, tc)
|
|
{
|
|
atf_tc_set_md_var(tc, "require.user", "root");
|
|
atf_tc_set_md_var(tc, "require.config", "allow_sysctl_side_effects");
|
|
atf_tc_set_md_var(tc, "descr",
|
|
"Testing delivery of SIGSYS on invalid syscalls");
|
|
}
|
|
|
|
ATF_TC_BODY(sigsys_test_on, tc)
|
|
{
|
|
sysctlset("kern.signosys", 1);
|
|
sigsys_test(1);
|
|
}
|
|
|
|
ATF_TC_CLEANUP(sigsys_test_on, tc)
|
|
{
|
|
sysctlcleanup("kern.signosys");
|
|
}
|
|
|
|
ATF_TC_WITH_CLEANUP(sigsys_test_off);
|
|
ATF_TC_HEAD(sigsys_test_off, tc)
|
|
{
|
|
atf_tc_set_md_var(tc, "require.user", "root");
|
|
atf_tc_set_md_var(tc, "require.config", "allow_sysctl_side_effects");
|
|
atf_tc_set_md_var(tc, "descr",
|
|
"Testing SIGSYS silence on invalid syscalls");
|
|
}
|
|
|
|
ATF_TC_BODY(sigsys_test_off, tc)
|
|
{
|
|
sysctlset("kern.signosys", 0);
|
|
sigsys_test(0);
|
|
}
|
|
|
|
ATF_TC_CLEANUP(sigsys_test_off, tc)
|
|
{
|
|
sysctlcleanup("kern.signosys");
|
|
}
|
|
|
|
ATF_TP_ADD_TCS(tp)
|
|
{
|
|
ATF_TP_ADD_TC(tp, sigsys_test_on);
|
|
ATF_TP_ADD_TC(tp, sigsys_test_off);
|
|
return (atf_no_error());
|
|
}
|