linux-kernel - Re: regression: NULL pointer dereference due to 27599aacbaef ("fbdev: Hot-unplug firmware fb devices on forced removal")

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Message-ID: <CADVatmMdBmU9E4XEnc8Y=JdvUKVvVgawJWtHqojW5hFHkkfaJQ@mail.gmail.com>
Date:   Tue, 5 Apr 2022 14:06:03 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     Javier Martinez Canillas <javierm@...hat.com>,
        Zack Rusin <zackr@...are.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: regression: NULL pointer dereference due to 27599aacbaef ("fbdev:
 Hot-unplug firmware fb devices on forced removal")

On Mon, Apr 4, 2022 at 8:46 PM Thomas Zimmermann <tzimmermann@...e.de> wrote:
>
> Hi
>
> Am 31.03.22 um 10:25 schrieb Sudip Mukherjee:
> > On Thu, Mar 31, 2022 at 8:07 AM Thomas Zimmermann <tzimmermann@...e.de> wrote:
> >>
> >>
> >>
> >> Am 28.03.22 um 17:41 schrieb Sudip Mukherjee:
> >>> Hi Thomas,
> >>>
> >>> We usually run boot tests with linux mainline HEAD commit almost every
> >>> night on ppc64 qemu. And my tests had been failing for last few days.
> >>
> >> Could you please provide your kernel's config file?
> >
> > Thanks for taking a look at it.
> > The config is attached.
> >
> >
>
> I was able to reproduce and fix the issue locally. Please have a look at
> [1] for the patch.

Thanks Thomas.

And I can confirm it fixes the problem for me too.
Tested-by: Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>


-- 
Regards
Sudip