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From: Philipp Stephani
Newsgroups: gmane.emacs.devel
Subject: Re: emacs-28 6d3608be88: Seccomp: improve support for newer versions
of glibc (Bug#51073)
Date: Tue, 25 Jan 2022 21:12:17 +0100
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Cc: Po Lu , Philipp Stephani ,
Robert Pluim , Lars Ingebrigtsen ,
emacs-devel@gnu.org
To: Eli Zaretskii
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Archived-At:
> Am 24.01.2022 um 18:19 schrieb Eli Zaretskii :
>=20
>> From: Robert Pluim
>> Cc: Lars Ingebrigtsen , luangruo@yahoo.com,
>> phst@google.com, p.stephani2@gmail.com, emacs-devel@gnu.org
>> Date: Mon, 24 Jan 2022 17:47:19 +0100
>>=20
>> Eli> It is very worrisome that a change in glibc can break Emacs =
like that.
>> Eli> I wonder what it means for the maintainability of Emacs in =
the long
>> Eli> run. I have a bad feeling about this.
>>=20
>> We can always default the seccomp support to off.
>=20
> If it's so fragile, perhaps we should.
The seccomp support isn't fragile at all. It only relies on the Linux =
kernel and a small number of syscalls that haven't changed for a long =
time.
What is "fragile" here (though I think this wording is incorrect) is the =
generation of the default filter that we ship for convenience reasons. =
That one should be adapted (maybe a few times per year, so not very =
frequently) to newer libc versions. There's no other way since unknown =
syscalls in the filter can't be allowed for security reasons.=