git: kernel - Fix a few MP races against process status
commit 0d78b86e0a2315042ff35cf013868289cb1c7acf
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sat Mar 5 16:05:20 2011 -0800
kernel - Fix a few MP races against process status
* proc->p_token is required when traversing p->p_lwp_tree.
* Reorder lwp insertion on lwp_fork() so scan races see a whole lwp
instead of a partially initialized one.
* Check for NULL p->p_pgrp and friends when only using proc_token to
scan the process list to deal with new processes that are still in the
middle of being fork()'d.
Reported-by: Peter Avalos <peter@theshell.com>,
Antonio Huete Jimenez <tuxillo@crater.dragonflybsd.org>
Summary of changes:
sys/kern/kern_fork.c | 25 +++++++++++++------------
sys/kern/kern_proc.c | 28 +++++++++++++++++++++-------
sys/kern/kern_synch.c | 25 ++++++++++++++++---------
3 files changed, 50 insertions(+), 28 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/0d78b86e0a2315042ff35cf013868289cb1c7acf
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