libthr: In the atfork handlers for signals, do not skip the last signal.

_SIG_MAXSIG works a bit unexpectedly: signals 1 till _SIG_MAXSIG are valid,
both bounds inclusive.

Reviewed by:	davidxu
MFC after:	1 week

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/libthr/thread/thr_sig.c b/lib/libthr/thread/thr_sig.c
index 46cbd82..3dee8b7 100644
--- a/lib/libthr/thread/thr_sig.c
+++ b/lib/libthr/thread/thr_sig.c
@@ -458,7 +458,7 @@ _thr_signal_prefork(void)
 {
 	int i;
 
-	for (i = 1; i < _SIG_MAXSIG; ++i)
+	for (i = 1; i <= _SIG_MAXSIG; ++i)
 		_thr_rwl_rdlock(&_thr_sigact[i-1].lock);
 }
 
@@ -467,7 +467,7 @@ _thr_signal_postfork(void)
 {
 	int i;
 
-	for (i = 1; i < _SIG_MAXSIG; ++i)
+	for (i = 1; i <= _SIG_MAXSIG; ++i)
 		_thr_rwl_unlock(&_thr_sigact[i-1].lock);
 }
 
@@ -476,7 +476,7 @@ _thr_signal_postfork_child(void)
 {
 	int i;
 
-	for (i = 1; i < _SIG_MAXSIG; ++i)
+	for (i = 1; i <= _SIG_MAXSIG; ++i)
 		bzero(&_thr_sigact[i-1].lock, sizeof(struct urwlock));
 }