linux-kernel - Re: [PATCH v2] fs/ceph/quota: ignore quota with CAP_SYS

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: <CAKPOu+-Q7c7=EgY3r=vbo5BUYYTuXJzfwwe+XRVAxmjRzMprUQ@mail.gmail.com>
Date: Wed, 11 Sep 2024 17:23:14 +0200
From: Max Kellermann <max.kellermann@...os.com>
To: Patrick Donnelly <pdonnell@...hat.com>
Cc: xiubli@...hat.com, idryomov@...il.com, ceph-devel@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] fs/ceph/quota: ignore quota with CAP_SYS_RESOURCE

On Wed, Sep 11, 2024 at 5:03 PM Patrick Donnelly <pdonnell@...hat.com> wrote:
> Just because the client cooperatively maintains the quota limits with
> the MDS does not mean it can override the quota in a distributed
> system.

I thought Ceph's quotas were implemented only on the client, just like
file permissions. Is that not correct? Is there an additional
server-side quota check? In my tests, I never saw one; it looked like
I could write arbitrary amounts of data with my patch.

Max