linux-kernel - Re: [PATCH] kexec: Fix reboot race during device

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Date:   Mon, 9 Oct 2023 10:01:55 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Joel Fernandes <joel@...lfernandes.org>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org, Ricardo Ribalda <ribalda@...gle.com>,
        Ross Zwisler <zwisler@...gle.com>,
        Rob Clark <robdclark@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        kexec@...ts.infradead.org
Subject: Re: [PATCH] kexec: Fix reboot race during device_shutdown()

On Sat, 7 Oct 2023 21:30:42 -0400
Joel Fernandes <joel@...lfernandes.org> wrote:

> Just checking how we want to proceed, is the consensus that we should
> prevent kernel crashes without relying on userspace stopping all
> processes? Should we fix regular reboot syscall as well and not just
> kexec reboot?

If you can show that we can trigger the crash on normal reboot, then I
don't see why not. That is, if you have a program that does the reboot
(without the SIGSTOP/SIGKILL calls) and triggers this crash, I think that's
a legitimate reason to fix it on normal reboot too.

-- Steve