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Message-ID: <20130806183109.GA29541@redhat.com>
Date: Tue, 6 Aug 2013 20:31:09 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Andy Lutomirski <luto@...capital.net>
Cc: security@...nel.org, oss-security@...ts.openwall.com,
Petr Matousek <pmatouse@...hat.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: CLONE_NEWUSER local DoS
On 08/06, Andy Lutomirski wrote:
>
> On Tue, Aug 6, 2013 at 9:47 AM, Oleg Nesterov <oleg@...hat.com> wrote:
> >
> > I'll send the patch, but perhaps there is something else. Eric?
>
> I think that's right. OTOH, it's not going to prevent this from OOMing:
Aaaah. user_ns_cachep I guess? ns->parent logic, yes??
I convinced myself this should be fine but it seems you are right.
IIUC, this needs another fix. Will try tomorrow. Not that I think
this needs my help ;)
Oleg.
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