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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 16 Mar 2012 10:59:04 +0000 (UTC)
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Subject: svn commit: r233028 - stable/9/sys/kern
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Author: kib
Date: Fri Mar 16 10:59:04 2012
New Revision: 233028
URL: http://svn.freebsd.org/changeset/base/233028

Log:
  MFC r232947:
  Lock the process around manipulations with p_flag.

Modified:
  stable/9/sys/kern/kern_exit.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/kern_exit.c
==============================================================================
--- stable/9/sys/kern/kern_exit.c	Fri Mar 16 10:51:42 2012	(r233027)
+++ stable/9/sys/kern/kern_exit.c	Fri Mar 16 10:59:04 2012	(r233028)
@@ -738,10 +738,12 @@ proc_reap(struct thread *td, struct proc
 	LIST_REMOVE(p, p_list);	/* off zombproc */
 	sx_xunlock(&allproc_lock);
 	LIST_REMOVE(p, p_sibling);
+	PROC_LOCK(p);
 	if (p->p_flag & P_ORPHAN) {
 		LIST_REMOVE(p, p_orphan);
 		p->p_flag &= ~P_ORPHAN;
 	}
+	PROC_UNLOCK(p);
 	leavepgrp(p);
 #ifdef PROCDESC
 	if (p->p_procdesc != NULL)