From: Rafael J. Wysocki <rjw@sisk.pl>
Date: Thu, 18 Oct 2007 10:04:45 +0000 (-0700)
Subject: freezer: prevent new tasks from inheriting TIF_FREEZE set
X-Git-Tag: v2.6.24-rc1~432
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e1318956ce6bf149af5c5e98499b5cd99f99c89;p=linux-2.6

freezer: prevent new tasks from inheriting TIF_FREEZE set

Tasks should go to the refrigerator only if explicitly requested to do that by
the freezer and not as a result of inheriting the TIF_FREEZE flag set from the
parent.  Make it happen.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/fork.c b/kernel/fork.c
index 490495a39c..7e455a93a7 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -942,6 +942,7 @@ static inline void copy_flags(unsigned long clone_flags, struct task_struct *p)
 	if (!(clone_flags & CLONE_PTRACE))
 		p->ptrace = 0;
 	p->flags = new_flags;
+	clear_freeze_flag(p);
 }
 
 asmlinkage long sys_set_tid_address(int __user *tidptr)