lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20100601144705.243D.A69D9226@jp.fujitsu.com>
Date:	Tue,  1 Jun 2010 14:48:05 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Oleg Nesterov <oleg@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH 2/5] oom: remove warning for in mm-less task __oom_kill_process()

If the race of mm detach in task exiting vs oom is happen,
find_lock_task_mm() can be return NULL.

So, the warning is pointless. remove it.


Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/oom_kill.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index bac4515..70e1a85 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -402,12 +402,8 @@ static int __oom_kill_process(struct task_struct *p, struct mem_cgroup *mem,
 		return 1;
 
 	p = find_lock_task_mm(p);
-	if (!p) {
-		WARN_ON(1);
-		printk(KERN_WARNING "tried to kill an mm-less task %d (%s)!\n",
-			task_pid_nr(p), p->comm);
+	if (!p)
 		return 1;
-	}
 
 	if (verbose)
 		printk(KERN_ERR "Killed process %d (%s) "
-- 
1.6.5.2



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ