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From: Oleg Nesterov <oleg@tv-sign.ru>
To: Jarek Poplawski <jarkao2@o2.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	"David S. Miller" <davem@davemloft.net>,
	David Howells <dhowells@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] net/bridge/br_if.c: don't use _WORK_NAR
Date: Mon, 19 Feb 2007 18:04:45 +0300	[thread overview]
Message-ID: <20070219150445.GC75@tv-sign.ru> (raw)
In-Reply-To: <20070219132703.GC2190@ff.dom.local>

On 02/19, Jarek Poplawski wrote:
>
> On Mon, Feb 19, 2007 at 03:03:53PM +0300, Oleg Nesterov wrote:
> > On 02/19, Jarek Poplawski wrote:
> ...
> > kfree() doesn't check WORK_STRUCT_PENDING, it makes no
> > difference if it is set or not when work->func() runs.
> 
> It looks like it's to be checked before kfree.

Here,
	br_add_if:

		schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);

schedule_delayed_work() fails if this bit is set. So the only difference with
this patch is:

	before:
		schedule_delayed_work() fails unless port_carrier_check() passed
		work_release() (before rtnl_lock())

	after:
		schedule_delayed_work() fails unless run_workqueue() cleared this
		bit (before calling port_carrier_check())

> > We are going to kill _NAR stuff.
> 
> If you're sure nobody uses this in any way then it
> seems the right decision.

Yes, this series converts all users.

Oleg.


  reply	other threads:[~2007-02-19 15:01 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-18 21:43 Oleg Nesterov
2007-02-19 11:00 ` Jarek Poplawski
2007-02-19 12:03   ` Oleg Nesterov
2007-02-19 13:27     ` Jarek Poplawski
2007-02-19 15:04       ` Oleg Nesterov [this message]
2007-02-20 13:25         ` Jarek Poplawski
2007-02-20 14:25           ` Oleg Nesterov
2007-02-19 11:27 ` David Howells
2007-02-19 11:59   ` Oleg Nesterov
2007-02-19 22:11     ` PATCH? net/bridge/br_if.c: fix use after free in port_carrier_check() Oleg Nesterov
2007-02-20 10:44     ` David Howells
2007-02-20 14:34       ` Oleg Nesterov
2007-02-19 13:15   ` [PATCH 1/3] net/bridge/br_if.c: don't use _WORK_NAR David Howells
2007-02-19 14:56     ` Oleg Nesterov
2007-02-19 15:15     ` David Howells

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