diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/posix-cpu-timers.c | 2 | ||||
| -rw-r--r-- | kernel/time/posix-timers.c | 28 |
2 files changed, 17 insertions, 13 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 5f444e372464..4305c003c8d4 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -746,7 +746,7 @@ static void __posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec64 *i * - Timers which expired, but the signal has not yet been * delivered */ - if (iv && ((timer->it_signal_seq & REQUEUE_PENDING) || sigev_none)) + if (iv && timer->it_status != POSIX_TIMER_ARMED) expires = bump_cpu_timer(timer, now); else expires = cpu_timer_getexpires(&timer->it.cpu); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index dd72b8e72697..b380e25d4947 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -269,7 +269,10 @@ bool posixtimer_deliver_signal(struct kernel_siginfo *info) if (!timr) goto out; - if (timr->it_interval && timr->it_signal_seq == info->si_sys_private) { + if (timr->it_signal_seq != info->si_sys_private) + goto out_unlock; + + if (timr->it_interval && !WARN_ON_ONCE(timr->it_status != POSIX_TIMER_REQUEUE_PENDING)) { timr->kclock->timer_rearm(timr); timr->it_status = POSIX_TIMER_ARMED; @@ -281,6 +284,7 @@ bool posixtimer_deliver_signal(struct kernel_siginfo *info) } ret = true; +out_unlock: unlock_timer(timr, flags); out: spin_lock(¤t->sighand->siglock); @@ -293,19 +297,18 @@ out: int posix_timer_queue_signal(struct k_itimer *timr) { enum posix_timer_state state = POSIX_TIMER_DISARMED; - int ret, si_private = 0; enum pid_type type; + int ret; lockdep_assert_held(&timr->it_lock); - if (timr->it_interval) { + if (timr->it_interval) state = POSIX_TIMER_REQUEUE_PENDING; - si_private = ++timr->it_signal_seq; - } + timr->it_status = state; type = !(timr->it_sigev_notify & SIGEV_THREAD_ID) ? PIDTYPE_TGID : PIDTYPE_PID; - ret = send_sigqueue(timr->sigq, timr->it_pid, type, si_private); + ret = send_sigqueue(timr->sigq, timr->it_pid, type, timr->it_signal_seq); /* If we failed to send the signal the timer stops. */ return ret > 0; } @@ -663,7 +666,7 @@ void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) * is a SIGEV_NONE timer move the expiry time forward by intervals, * so expiry is > now. */ - if (iv && (timr->it_signal_seq & REQUEUE_PENDING || sig_none)) + if (iv && timr->it_status != POSIX_TIMER_ARMED) timr->it_overrun += kc->timer_forward(timr, now); remaining = kc->timer_remaining(timr, now); @@ -863,8 +866,6 @@ void posix_timer_set_common(struct k_itimer *timer, struct itimerspec64 *new_set else timer->it_interval = 0; - /* Prevent reloading in case there is a signal pending */ - timer->it_signal_seq = (timer->it_signal_seq + 2) & ~REQUEUE_PENDING; /* Reset overrun accounting */ timer->it_overrun_last = 0; timer->it_overrun = -1LL; @@ -882,8 +883,6 @@ int common_timer_set(struct k_itimer *timr, int flags, if (old_setting) common_timer_get(timr, old_setting); - /* Prevent rearming by clearing the interval */ - timr->it_interval = 0; /* * Careful here. On SMP systems the timer expiry function could be * active and spinning on timr->it_lock. @@ -933,6 +932,9 @@ retry: if (old_spec64) old_spec64->it_interval = ktime_to_timespec64(timr->it_interval); + /* Prevent signal delivery and rearming. */ + timr->it_signal_seq++; + kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; @@ -1001,7 +1003,6 @@ int common_timer_del(struct k_itimer *timer) { const struct k_clock *kc = timer->kclock; - timer->it_interval = 0; if (kc->timer_try_to_cancel(timer) < 0) return TIMER_RETRY; timer->it_status = POSIX_TIMER_DISARMED; @@ -1012,6 +1013,9 @@ static inline int timer_delete_hook(struct k_itimer *timer) { const struct k_clock *kc = timer->kclock; + /* Prevent signal delivery and rearming. */ + timer->it_signal_seq++; + if (WARN_ON_ONCE(!kc || !kc->timer_del)) return -EINVAL; return kc->timer_del(timer); |