linux-kernel - Re: Linux 6.2.1 hits a display driver bug (list_del corruption, ffff88811b4af298->next is NULL)

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Message-ID: <87v8jetaik.fsf@intel.com>
Date:   Mon, 06 Mar 2023 12:54:59 +0200
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>,
        Bagas Sanjaya <bagasdotme@...il.com>
Cc:     Intel GFX Mailing List <intel-gfx@...ts.freedesktop.org>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>,
        Manasi Navare <manasi.d.navare@...el.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: Linux 6.2.1 hits a display driver bug (list_del corruption,
 ffff88811b4af298->next is NULL)

On Sun, 05 Mar 2023, Ammar Faizi <ammarfaizi2@...weeb.org> wrote:
> On Fri, Mar 03, 2023 at 03:06:18PM +0700, Bagas Sanjaya wrote:
>> Can you please try v6.1?
>
> It's reproducible in v6.1.9. I finally can reliably reproduce it, it
> only happens when I start a VM with qemu.
>
> Specifically adding this device to the qemu instance:
>
>   <hostdev mode="subsystem" type="pci" managed="yes">
>     <source>
>       <address domain="0x0000" bus="0x00" slot="0x02" function="0x0"/>
>     </source>
>     <address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
>   </hostdev>
>
> And that slot is used by this hardware:
>
>   0000:00:02:0 Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics]
>
> Removing it from the qemu instance solves the issue. But it's still a
> kernel bug anyway.

Please file a bug at fdo gitlab:

https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs


BR,
Jani.

-- 
Jani Nikula, Intel Open Source Graphics Center