diff options
Diffstat (limited to 'sys/kern/kern_event.c')
| -rw-r--r-- | sys/kern/kern_event.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c index fe6f238..4c068bf 100644 --- a/sys/kern/kern_event.c +++ b/sys/kern/kern_event.c @@ -554,8 +554,17 @@ static int filt_timerattach(struct knote *kn) { struct callout *calloutp; + sbintime_t to; unsigned int ncallouts; + if ((intptr_t)kn->kn_sdata < 0) + return (EINVAL); + if ((intptr_t)kn->kn_sdata == 0 && (kn->kn_flags & EV_ONESHOT) == 0) + kn->kn_sdata = 1; + to = timer2sbintime(kn->kn_sdata); + if (to < 0) + return (EINVAL); + ncallouts = atomic_load_explicit(&kq_ncallouts, memory_order_relaxed); do { if (ncallouts >= kq_calloutmax) @@ -569,8 +578,7 @@ filt_timerattach(struct knote *kn) calloutp = malloc(sizeof(*calloutp), M_KQUEUE, M_WAITOK); callout_init(calloutp, CALLOUT_MPSAFE); kn->kn_hook = calloutp; - callout_reset_sbt_on(calloutp, - timer2sbintime(kn->kn_sdata), 0 /* 1ms? */, + callout_reset_sbt_on(calloutp, to, 0 /* 1ms? */, filt_timerexpire, kn, PCPU_GET(cpuid), 0); return (0); |
