netdev - Re: [RFC] netlink: netlink_ack send a capped message in case of error

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] [day] [month] [year] [list]

Message-ID: <55DCC074.3060907@gmail.com>
Date:	Tue, 25 Aug 2015 21:22:28 +0200
From:	Christophe Ricard <christophe.ricard@...il.com>
To:	David Miller <davem@...emloft.net>, pablo@...filter.org
CC:	sfeldma@...il.com, jbenc@...hat.com, sameo@...ux.intel.com,
	netdev@...r.kernel.org, christophe-h.ricard@...com
Subject: Re: [RFC] netlink: netlink_ack send a capped message in case of error

Hi David, Pablo,

I gave try to your proposed patch.
Changes in netlink_getsockopt and netlink_setsockopt are working fine.

Changes in netlink_ack looks not to be addressing the correct socket.

I will send an updated version in few minutes.

Best Regards
Christophe

On 25/08/2015 06:19, David Miller wrote:
> From: Pablo Neira Ayuso <pablo@...filter.org>
> Date: Mon, 24 Aug 2015 20:56:37 +0200
>
>> On Mon, Aug 24, 2015 at 10:08:22AM +0200, Christophe Ricard wrote:
>>> Hi Scott,
>>>
>>> I think i understand the potential limitation of my solution.
>>> I saw something was proposed by Jiri Benc who pushed an additional flag to
>>> tell if the payload can be ignored in case of an error.
>>> http://patchwork.ozlabs.org/patch/290976/
>>>
>>> Do you think this one is acceptable ? I am not sure to understand David
>>> last comment.
>> I think David suggests something like the (completely untested)
>> attached patch.
> Yes, echo'ing the entire message back in an ACK is really pointless.
>
> Especially since if the user really is interested in noticing ACKs
> it can very easily keep the original request around and match on
> sequence number, as Pablo's patch's commit message suggests.
>
> We're stuck with the current behavior by default, but we can add the
> new ACK feature to deal with the issue in the long term.

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html