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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 4 Apr 2022 21:46:13 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
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")

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.

Best regards
Thomas

[1] https://patchwork.freedesktop.org/patch/480648/

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

Download attachment "OpenPGP_signature" of type "application/pgp-signature" (841 bytes)