linux-kernel - Re: ioremap and dma cleanups and fixes for superh (2nd resend)

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Message-ID: <0322def7-fc16-c805-8f2b-c88fffce2f1e@physik.fu-berlin.de>
Date:   Wed, 15 Jul 2020 16:37:14 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Rich Felker <dalias@...c.org>, Christoph Hellwig <hch@....de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: ioremap and dma cleanups and fixes for superh (2nd resend)

Hi Geert!

On 7/15/20 10:27 AM, John Paul Adrian Glaubitz wrote:
>> Lemme gues: does commit 002ae7057069538a ("mm, dump_page(): do not crash
>> with invalid mapping pointer") in v5.8-rc1 help?
> 
> Hmm, it seems I already have that patch (I'm using Linus' main tree):
> 
> commit 002ae7057069538aa3afd500f6f60a429cb948b2
> Author: Vlastimil Babka <vbabka@...e.cz>
> Date:   Mon Jun 1 21:46:03 2020 -0700
> 
>     mm, dump_page(): do not crash with invalid mapping pointer

Okay, kernel 5.0.0 does not suffer from this bug. So I should be able to bisect
this particular issue.

I'm glad I don't have to start bisecting with earlier kernels because these
won't build easily with my current toolchain based on gcc-9.

Will report once I found the bad commit that introduced the problem.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@...ian.org
`. `'   Freie Universitaet Berlin - glaubitz@...sik.fu-berlin.de
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