linux-kernel - Re: [PATCH v3 2/2] vfs: avoid duplicating creds in faccessat if possible

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Date:   Mon, 27 Feb 2023 16:44:06 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Mateusz Guzik <mjguzik@...il.com>
Cc:     viro@...iv.linux.org.uk, serge@...lyn.com, paul@...l-moore.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v3 2/2] vfs: avoid duplicating creds in faccessat if possible

On Wed, Jan 25, 2023 at 7:56 AM Mateusz Guzik <mjguzik@...il.com> wrote:
>
> Turns out for typical consumers the resulting creds would be identical
> and this can be checked upfront, avoiding the hard work.

I've applied this v3 of the two patches.

Normally it would go through Al, but he's clearly been under the
weather and is drowning in email. Besides, I'm comfortable with this
particular set of patches anyway as I was involved in the previous
round of access() overhead avoidance with the whole RCU grace period
thing.

So I think we're all better off having Al look at any iov_iter issues.

Anybody holler if there are issues,

             Linus