From 98f03f90302d1d2f1878c8451c5ddf1789eeafce Mon Sep 17 00:00:00 2001
From: Jake Burkholder <jake@FreeBSD.org>
Date: Sat, 23 Dec 2000 19:43:10 +0000
Subject: Protect proc.p_pptr and proc.p_children/p_sibling with the
 proctree_lock.

linprocfs not locked pending response from informal maintainer.

Reviewed by:	jhb, -smp@
---
 sys/kern/kern_fork.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'sys/kern/kern_fork.c')

diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index 60171a5a854a..1c8cb3853c86 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -476,8 +476,10 @@ again:
 		pptr = initproc;
 	else
 		pptr = p1;
+	PROCTREE_LOCK(PT_EXCLUSIVE);
 	p2->p_pptr = pptr;
 	LIST_INSERT_HEAD(&pptr->p_children, p2, p_sibling);
+	PROCTREE_LOCK(PT_RELEASE);
 	LIST_INIT(&p2->p_children);
 	LIST_INIT(&p2->p_heldmtx);
 	LIST_INIT(&p2->p_contested);
-- 
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