Sat Nov 7 20:45:20 2015 UTC ()
Pull up following revision(s) (requested by pgoyette in ticket #1980):
	sys/kern/kern_sig.c: revision 1.321
When delivering a signal, it's possible that the process's state in
p_stat is SACTIVE yet p_sflag is PS_STOPPING (while waiting for other
lwp's to stop).  In that case, we don't want to adjust the parent's
p_nstopchild count.
Found by Robert Elz.


(snj)
diff -r1.289.4.8 -r1.289.4.9 src/sys/kern/kern_sig.c

cvs diff -r1.289.4.8 -r1.289.4.9 src/sys/kern/kern_sig.c (expand / switch to context diff)
--- src/sys/kern/kern_sig.c 2012/03/17 19:14:08 1.289.4.8
+++ src/sys/kern/kern_sig.c 2015/11/07 20:45:19 1.289.4.9
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_sig.c,v 1.289.4.8 2012/03/17 19:14:08 bouyer Exp $	*/
+/*	$NetBSD: kern_sig.c,v 1.289.4.9 2015/11/07 20:45:19 snj Exp $	*/
 
 /*-
  * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.289.4.8 2012/03/17 19:14:08 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.289.4.9 2015/11/07 20:45:19 snj Exp $");
 
 #include "opt_ptrace.h"
 #include "opt_compat_sunos.h"
@@ -1402,14 +1402,13 @@
 		}
 		if ((prop & SA_CONT) != 0 || signo == SIGKILL) {
 			/*
-			 * Re-adjust p_nstopchild if the process wasn't
-			 * collected by its parent.
+			 * Re-adjust p_nstopchild if the process was
+			 * stopped but not yet collected by its parent.
 			 */
+			if (p->p_stat == SSTOP && !p->p_waited)
+				p->p_pptr->p_nstopchild--;
 			p->p_stat = SACTIVE;
 			p->p_sflag &= ~PS_STOPPING;
-			if (!p->p_waited) {
-				p->p_pptr->p_nstopchild--;
-			}
 			if (p->p_slflag & PSL_TRACED) {
 				KASSERT(signo == SIGKILL);
 				goto deliver;