linux-kernel - Re: [PATCH] shmem: restrict noswap option to initial user namespace

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Message-ID: <ZEGP8fLlSDFw52F1@bombadil.infradead.org>
Date:   Thu, 20 Apr 2023 12:18:09 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Christian Brauner <brauner@...nel.org>
Cc:     Hugh Dickins <hughd@...gle.com>, akpm@...ux-foundation.org,
        willy@...radead.org, linux-mm@...ck.org, p.raghav@...sung.com,
        da.gomez@...sung.com, a.manzanares@...sung.com, dave@...olabs.net,
        yosryahmed@...gle.com, keescook@...omium.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] shmem: restrict noswap option to initial user namespace

On Thu, Apr 20, 2023 at 10:57:43AM +0200, Christian Brauner wrote:
> Prevent tmpfs instances mounted in an unprivileged namespaces from
> evading accounting of locked memory by using the "noswap" mount option.
> 
> Cc: Luis Chamberlain <mcgrof@...nel.org>
> Reported-by: Hugh Dickins <hughd@...gle.com>
> Link: https://lore.kernel.org/lkml/79eae9fe-7818-a65c-89c6-138b55d609a@google.com
> Signed-off-by: Christian Brauner <brauner@...nel.org>

Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>

  Luis