From: Florian Weimer <fweimer@redhat.com>
To: Christian Brauner <brauner@kernel.org>
Cc: Adhemerval Zanella <adhemerval.zanella@linaro.org>,
libc-alpha@sourceware.org, Alexey Izbyshev <izbyshev@ispras.ru>,
Carlos O'Donell <carlos@redhat.com>,
Andrei Vagin <avagin@gmail.com>
Subject: Re: [PATCH v4 0/3] Linux: Fix posix_spawn when user with time namespaces
Date: Wed, 25 May 2022 14:24:42 +0200 [thread overview]
Message-ID: <87h75dyf3p.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <20220511092119.ke4zlm2dkazasmva@wittgenstein> (Christian Brauner's message of "Wed, 11 May 2022 11:21:19 +0200")
* Christian Brauner:
> On Tue, May 10, 2022 at 09:18:46PM +0200, Florian Weimer wrote:
>> * Adhemerval Zanella:
>>
>> > The patchset adds some support to tests the fallback code to
>> > use only use CLONE_VFORK. It uses unshare directly because
>> > it simpler than add container support.
>> >
>> > Adhemerval Zanella (3):
>> > linux: Add CLONE_NEWTIME from Linux 5.6 to bits/sched.h
>> > support: Add support_enter_time_namespace
>> > linux: Add fallback for clone failure on posix_spawn (BZ #29115)
>>
>> Christan, how likely is it that we'd get another time namespace variant
>> that would only become effective after execve (when the DSO is remapped
>> anyway)?
>
> Not unlikely if it helps you avoid a lot of complexity. I will need some
> time to track down Andrei and others to discuss though.
Any progress with that? (I hope I guessed the right Andrei.)
Breaking vfork is really a bit of a hassle for us, and the workaround
code is quite non-trivial and will have to implemented across many
projects (not just glibc). An unshare request that takes effect on
execve only would really help.
Thanks,
Florian
next prev parent reply other threads:[~2022-05-25 12:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 19:11 Adhemerval Zanella
2022-05-10 19:11 ` [PATCH v4 1/3] linux: Add CLONE_NEWTIME from Linux 5.6 to bits/sched.h Adhemerval Zanella
2022-05-23 13:45 ` Adhemerval Zanella
2022-05-10 19:11 ` [PATCH v4 2/3] support: Add support_enter_time_namespace Adhemerval Zanella
2022-05-10 19:11 ` [PATCH v4 3/3] linux: Add fallback for clone failure on posix_spawn (BZ #29115) Adhemerval Zanella
2022-05-10 19:18 ` [PATCH v4 0/3] Linux: Fix posix_spawn when user with time namespaces Florian Weimer
2022-05-11 9:21 ` Christian Brauner
2022-05-11 16:01 ` Alexey Izbyshev
2022-05-25 12:24 ` Florian Weimer [this message]
2022-05-27 15:53 ` Andrei Vagin
2022-05-28 0:03 ` Andrei Vagin
2022-05-29 14:33 ` Christian Brauner
2022-05-30 12:58 ` Florian Weimer
2022-06-08 7:21 ` Andrei Vagin
2022-06-08 8:35 ` Florian Weimer
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