netdev - Re: [PATCH next] sysctl: expose all net/core sysctls inside netns

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 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:   Thu, 22 Dec 2022 18:12:50 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Mahesh Bandewar <maheshb@...gle.com>
Cc:     Netdev <netdev@...r.kernel.org>,
        Mahesh Bandewar <mahesh@...dewar.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: Re: [PATCH next] sysctl: expose all net/core sysctls inside netns

On Thu, 22 Dec 2022 11:10:05 -0800 Mahesh Bandewar wrote:
> All were not visible to the non-priv users inside netns. However,
> with 4ecb90090c84 ("sysctl: allow override of /proc/sys/net with
> CAP_NET_ADMIN"), these vars are protected from getting modified.
> A proc with capable(CAP_NET_ADMIN) can change the values so
> not having them visible inside netns is just causing nuisance to
> process that check certain values (e.g. net.core.somaxconn) and
> see different behavior in root-netns vs. other-netns

SG, but net-next is closed, please repost after New Year.