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Message-ID: <20200908185026.GU1236603@ZenIV.linux.org.uk>
Date: Tue, 8 Sep 2020 19:50:26 +0100
From: Al Viro <viro@...iv.linux.org.uk>
To: Mickaël Salaün <mic@...ikod.net>
Cc: linux-kernel@...r.kernel.org, Aleksa Sarai <cyphar@...har.com>,
Alexei Starovoitov <ast@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
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Eric Chiang <ericchiang@...gle.com>,
Florian Weimer <fweimer@...hat.com>,
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Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
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Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
Thibaut Sautereau <thibaut.sautereau@...p-os.org>,
Vincent Strubel <vincent.strubel@....gouv.fr>,
kernel-hardening@...ts.openwall.com, linux-api@...r.kernel.org,
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Subject: Re: [RFC PATCH v8 0/3] Add support for AT_INTERPRETED (was O_MAYEXEC)
On Tue, Sep 08, 2020 at 09:59:53AM +0200, Mickaël Salaün wrote:
> Hi,
>
> This height patch series rework the previous O_MAYEXEC series by not
> adding a new flag to openat2(2) but to faccessat2(2) instead. As
> suggested, this enables to perform the access check on a file descriptor
> instead of on a file path (while opening it). This may require two
> checks (one on open and then with faccessat2) but it is a more generic
> approach [8].
Again, why is that folded into lookup/open/whatnot, rather than being
an operation applied to a file (e.g. O_PATH one)?
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