Author: kib
Date: Fri May 19 09:04:18 2017
New Revision: 318528
URL: https://svnweb.freebsd.org/changeset/base/318528
Log:
MFC r318243:
Do not wake up sleeping thread in reschedule_signals() if the signal
is blocked. The spurious wakeup might result in spurious EINTR.
PR: 219228
Modified:
stable/11/sys/kern/kern_sig.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/kern/kern_sig.c
==============================================================================
--- stable/11/sys/kern/kern_sig.c Fri May 19 08:38:03 2017
(r318527)
+++ stable/11/sys/kern/kern_sig.c Fri May 19 09:04:18 2017
(r318528)
@@ -2664,7 +2664,9 @@ reschedule_signals(struct proc *p, sigse
signotify(td);
if (!(flags & SIGPROCMASK_PS_LOCKED))
mtx_lock(&ps->ps_mtx);
- if (p->p_flag & P_TRACED || SIGISMEMBER(ps->ps_sigcatch, sig))
+ if (p->p_flag & P_TRACED ||
+ (SIGISMEMBER(ps->ps_sigcatch, sig) &&
+ !SIGISMEMBER(td->td_sigmask, sig)))
tdsigwakeup(td, sig, SIG_CATCH,
(SIGISMEMBER(ps->ps_sigintr, sig) ? EINTR :
ERESTART));
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