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When sending ignored signal, arrange for zero return code from sleep

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Otherwise consumers get unexpected EINTR errors without seeing
a properly discarded signal.

Reported and tested by:	trasz
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D32252
This commit is contained in:
Konstantin Belousov 2021-10-01 09:59:02 +03:00
parent b599982b65
commit f17eb93d55
2 changed files with 14 additions and 11 deletions
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23
sys/kern/kern_sig.c
View File

@ -2214,17 +2214,20 @@ tdsendsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
return (ret);
} else {
action = SIG_CATCH;
intrval = 0;
}
} else if (SIGISMEMBER(td->td_sigmask, sig))
action = SIG_HOLD;
else if (SIGISMEMBER(ps->ps_sigcatch, sig))
action = SIG_CATCH;
else
action = SIG_DFL;
if (SIGISMEMBER(ps->ps_sigintr, sig))
intrval = EINTR;
else
intrval = ERESTART;
} else {
if (SIGISMEMBER(td->td_sigmask, sig))
action = SIG_HOLD;
else if (SIGISMEMBER(ps->ps_sigcatch, sig))
action = SIG_CATCH;
else
action = SIG_DFL;
if (SIGISMEMBER(ps->ps_sigintr, sig))
intrval = EINTR;
else
intrval = ERESTART;
}
mtx_unlock(&ps->ps_mtx);
if (prop & SIGPROP_CONT)

2
sys/kern/subr_sleepqueue.c
View File

@ -1126,7 +1126,7 @@ sleepq_abort(struct thread *td, int intrval)
THREAD_LOCK_ASSERT(td, MA_OWNED);
MPASS(TD_ON_SLEEPQ(td));
MPASS(td->td_flags & TDF_SINTR);
MPASS(intrval == EINTR || intrval == ERESTART);
MPASS(intrval == 0 || intrval == EINTR || intrval == ERESTART);
/*
* If the TDF_TIMEOUT flag is set, just leave. A