linux-kernel - Re: [PATCH] p9caps: add Plan9 capability devices

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]

Date:   Tue, 13 Feb 2018 12:40:14 +0000
From:   "Enrico Weigelt, metux IT consult" <metux@....de>
To:     "Serge E. Hallyn" <serge@...lyn.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] p9caps: add Plan9 capability devices

On 13.02.2018 07:16, Serge E. Hallyn wrote:
>> +	/* make sure only one instance per namespace can be opened */ > > ... at a time
yeah, right.

> might be better to keep this state in the user_ns itself, would
> avoid kzalloc below.

thought about, but hesitated to touch user_ns. might not be the best
idea when having p9caps as module (OTOH, doesn't need to be a module)

the whole thing might become a bit more complex when introducing
plan9-like unprivileged mount operations. haven't sorted out how to
do that yet.

> Would it be worth doing any privilege checking here?

Which ones should I check ?

--mtx