From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Thu, 29 Nov 2007 00:21:24 +0000 (-0800)
Subject: wait_task_stopped(): don't use task_pid_nr_ns() lockless
X-Git-Tag: v2.6.24-rc4~66
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c895078355b6b6e05c60aa205892526dd3390f0a;p=pandora-kernel.git

wait_task_stopped(): don't use task_pid_nr_ns() lockless

wait_task_stopped(WNOWAIT) does task_pid_nr_ns() without tasklist/rcu lock,
we can read an already freed memory.  Use the cached pid_t value.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Looks-good-to: Roland McGrath <roland@redhat.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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