113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 Linaro Limited. All rights reserved.
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* Author: Viresh Kumar<viresh.kumar@linaro.org>
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*
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* Check Year 2038 related vulnerabilities.
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*/
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#include <signal.h>
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#include "config.h"
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#include "time64_variants.h"
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#include "tst_timer.h"
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#include "tst_safe_clocks.h"
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#define TIMER_DELTA 3
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#define ALLOWED_DELTA (50 * 1000) /* 50 ms */
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static struct tst_ts start, end;
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static struct tst_its its;
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static struct time64_variants variants[] = {
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#if (__NR_clock_settime != __LTP__NR_INVALID_SYSCALL)
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{ .clock_gettime = sys_clock_gettime, .clock_settime = sys_clock_settime, .timer_settime = sys_timer_settime, .ts_type = TST_KERN_OLD_TIMESPEC, .desc = "syscall with old kernel spec"},
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#endif
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#if (__NR_clock_settime64 != __LTP__NR_INVALID_SYSCALL)
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{ .clock_gettime = sys_clock_gettime64, .clock_settime = sys_clock_settime64, .timer_settime = sys_timer_settime64, .ts_type = TST_KERN_TIMESPEC, .desc = "syscall time64 with kernel spec"},
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#endif
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};
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static void setup(void)
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{
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struct time64_variants *tv = &variants[tst_variant];
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tst_res(TINFO, "Testing variant: %s", tv->desc);
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start.type = end.type = its.type = tv->ts_type;
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/* Check if the kernel is y2038 safe */
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if (tv->ts_type == TST_KERN_OLD_TIMESPEC &&
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sizeof(start.ts.kern_old_ts.tv_sec) == 4) {
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tst_brk(TCONF, "Not Y2038 safe to run test");
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}
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}
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static void run(void)
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{
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struct time64_variants *tv = &variants[tst_variant];
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unsigned long long time = 0x7FFFFFFE; /* Time just before y2038 */
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struct sigevent ev = {
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.sigev_notify = SIGEV_SIGNAL,
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.sigev_signo = SIGABRT,
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};
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long long diff;
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kernel_timer_t timer;
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sigset_t set;
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int sig, ret;
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SAFE_SIGEMPTYSET(&set);
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SAFE_SIGADDSET(&set, SIGABRT);
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SAFE_SIGPROCMASK(SIG_BLOCK, &set, NULL);
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TEST(tst_syscall(__NR_timer_create, CLOCK_REALTIME, &ev, &timer));
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if (TST_RET != 0)
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tst_brk(TBROK | TTERRNO, "timer_create() failed");
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tst_ts_set_sec(&start, time);
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tst_ts_set_nsec(&start, 0);
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ret = tv->clock_settime(CLOCK_REALTIME, tst_ts_get(&start));
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if (ret == -1)
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tst_brk(TBROK | TERRNO, "clock_settime() failed");
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tst_its_set_interval_sec(&its, 0);
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tst_its_set_interval_nsec(&its, 0);
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tst_its_set_value_sec(&its, time + TIMER_DELTA);
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tst_its_set_value_nsec(&its, 0);
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TEST(tv->timer_settime(timer, TIMER_ABSTIME, tst_its_get(&its), NULL));
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if (TST_RET == -1)
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tst_brk(TBROK | TTERRNO, "timer_settime() failed");
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SAFE_SIGWAIT(&set, &sig);
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ret = tv->clock_gettime(CLOCK_REALTIME, tst_ts_get(&end));
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if (ret == -1)
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tst_brk(TBROK | TERRNO, "clock_gettime() failed");
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if (sig != SIGABRT) {
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tst_res(TFAIL, "clock_settime(): Y2038 test failed");
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return;
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}
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diff = tst_ts_diff_ms(end, start);
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if (diff < TIMER_DELTA * 1000) {
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tst_res(TFAIL, "Timer expired too soon, after %llims", diff);
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return;
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}
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if (diff > TIMER_DELTA * 1000 + ALLOWED_DELTA)
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tst_res(TINFO, "Time expired too late, after %llims", diff);
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else
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tst_res(TPASS, "clock_settime(): Y2038 test passed");
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}
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static struct tst_test test = {
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.test_all = run,
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.test_variants = ARRAY_SIZE(variants),
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.setup = setup,
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.needs_root = 1,
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.restore_wallclock = 1,
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};
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