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Date: Wed, 23 Sep 2020 20:11:36 +0200
From: Solar Designer <solar@...nwall.com>
To: Florian Weimer <fweimer@...hat.com>
Cc: Pavel Machek <pavel@....cz>, madvenka@...ux.microsoft.com,
kernel-hardening@...ts.openwall.com, linux-api@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-security-module@...r.kernel.org, oleg@...hat.com,
x86@...nel.org, luto@...nel.org, David.Laight@...LAB.COM,
mark.rutland@....com, mic@...ikod.net,
Rich Felker <dalias@...c.org>
Subject: Re: [PATCH v2 0/4] [RFC] Implement Trampoline File Descriptor
On Wed, Sep 23, 2020 at 04:39:31PM +0200, Florian Weimer wrote:
> * Solar Designer:
>
> > While I share my opinion here, I don't mean that to block Madhavan's
> > work. I'd rather defer to people more knowledgeable in current userland
> > and ABI issues/limitations and plans on dealing with those, especially
> > to Florian Weimer. I haven't seen Florian say anything specific for or
> > against Madhavan's proposal, and I'd like to. (Have I missed that?)
[...]
> I think it's unnecessary for the libffi use case.
[...]
> I don't know if kernel support could
> make sense in this context, but it would be a completely different
> patch.
Thanks. Are there currently relevant use cases where the proposed
trampfd would be useful and likely actually made use of by userland -
e.g., specific userland project developers saying they'd use it, or
Madhavan intending to develop and contribute userland patches?
Alexander
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