linux-kernel - Re: [PATCH 6/6] coredump: Limit coredumps to a single thread group

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Message-Id: <20211119160348.22409-1-khuey@kylehuey.com>
Date:   Fri, 19 Nov 2021 08:03:48 -0800
From:   Kyle Huey <me@...ehuey.com>
To:     "Eric W . Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Al Viro <viro@...IV.linux.org.uk>, linux-api@...r.kernel.org,
        Kees Cook <keescook@...omium.org>,
        Robert O'Callahan <rocallahan@...il.com>
Subject: Re: [PATCH 6/6] coredump: Limit coredumps to a single thread group

> Solve this by making a userspace visible change to only kill a single
> process/thread group. [...] With LinuxThreads long gone I don't
> expect anyone to have a notice this behavior change in practice.

FWIW rr's test suite does have an explicit test that we correctly record and 
replay the old behavior. We don't actually care what that behavior is though,
so we will update our tests.

- Kyle