netdev - Re: [PATCH net 0/2] lwtunnel: make it really work, for IPv4

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: <20150924103511.6fe80b6b@griffin>
Date:	Thu, 24 Sep 2015 10:35:11 +0200
From:	Jiri Benc <jbenc@...hat.com>
To:	ebiederm@...ssion.com (Eric W. Biederman)
Cc:	Thomas Graf <tgraf@...g.ch>, netdev@...r.kernel.org,
	Roopa Prabhu <roopa@...ulusnetworks.com>
Subject: Re: [PATCH net 0/2] lwtunnel: make it really work, for IPv4

On Wed, 23 Sep 2015 16:09:14 -0500, Eric W. Biederman wrote:
> *Blink* You were targeting net.git with a feature enhancement????
> I will just ignore that.

I do not. This is set is a minimal fix to make IP based lwtunnels with
tunnel information specified in a route working (for IPv4, anyway).
Note that lwtunnels and IP/UDP based lwtunnels is a new feature merged
for 4.3. This set fixes a flaw in that feature.

Eric, I'd like you to ask how do you propose to fix this problem in
net.git. So far, your proposals were:

1. Use a new ndo to "reverse" metadata dst. I can do that but all
   current users will just call iptunnel_metadata_reply. Seems to be
   superfluous but whatever.

2. Replace metadata_dst on ingress with a combination of cb and
   outer_*_header. This is certainly not suitable for net.git and won't
   solve the problem anyway.

Meanwhile, I'm going to resubmit patch 2 as a separate fix, as this is
kind of urgent. Having non working feature in a released kernel is sad
but only a temporary problem. Having non working uAPI in a released
kernel is a problem we'll have to deal with forever.

 Jiri

-- 
Jiri Benc
--
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