linux-kernel - Re: [PATCH 1/2] zram: fix crashes due to use of cpu hotplug multistate

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Message-ID: <20210408091655.64905da9@gandalf.local.home>
Date:   Thu, 8 Apr 2021 09:16:55 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Minchan Kim <minchan@...nel.org>, keescook@...omium.org,
        dhowells@...hat.com, hch@...radead.org, mbenes@...e.com,
        ngupta@...are.org, sergey.senozhatsky.work@...il.com,
        axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Jessica Yu <jeyu@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 1/2] zram: fix crashes due to use of cpu hotplug
 multistate

On Thu, 8 Apr 2021 08:18:21 +0200
Greg KH <gregkh@...uxfoundation.org> wrote:

> And I would love a taint for rmmod, but what is that going to help out
> with?

Just like any other taint. If a rmmod can cause the system to lose
integrity, the rmmod could cause a subtle issue that manifests itself into
something more serious and may look unrelated. If you have a bug report
with the rmmod taint, one could ask to try to recreate the bug without
doing rmmod. Or perhaps we have a similar bug reports that all show the
rmmod taint. That would give us an impression that something was removed
and caused the system to lose stability.

-- Steve