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: <a5d94f04-a980-ee3f-bd8d-42df3a859777@spawn.link>
Date:   Wed, 30 Sep 2020 15:16:20 -0400
From:   Antonio SJ Musumeci <trapexit@...wn.link>
To:     Miklos Szeredi <miklos@...redi.hu>,
        Alessio Balsini <balsini@...roid.com>
Cc:     Akilesh Kailash <akailash@...gle.com>,
        Amir Goldstein <amir73il@...il.com>,
        David Anderson <dvander@...gle.com>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Jann Horn <jannh@...gle.com>, Jens Axboe <axboe@...nel.dk>,
        Martijn Coenen <maco@...roid.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Lawrence <paullawrence@...gle.com>,
        Stefano Duo <stefanoduo@...gle.com>,
        Zimuzo Ezeozue <zezeozue@...gle.com>,
        fuse-devel <fuse-devel@...ts.sourceforge.net>,
        kernel-team <kernel-team@...roid.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V9 2/4] fuse: Trace daemon creds

On 9/30/2020 2:45 PM, Miklos Szeredi wrote:
> On Thu, Sep 24, 2020 at 3:13 PM Alessio Balsini <balsini@...roid.com> wrote:
>> Add a reference to the FUSE daemon credentials, so that they can be used to
>> temporarily raise the user credentials when accessing lower file system
>> files in passthrough.
> Hmm, I think it would be better to store the creds of the ioctl()
> caller together with the open file.   The mounter may deliberately
> have different privileges from the process doing the actual I/O.
>
> Thanks,
> Miklos


In my usecase I'm changing euid/egid of the thread to whichever the 
uid/gid was passed to the server which is otherwise running as root.

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ