linux-kernel - Re: BUG: KASAN: null-ptr-deref in drm_sched_job_cleanup+0x96/0x290 [gpu

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Message-ID: <CABXGCsPcPY8dqZm0aF4c1p0ZvMYHy+NksMrZi9xK0=WdE5_osA@mail.gmail.com>
Date:   Wed, 19 Apr 2023 18:13:40 +0500
From:   Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To:     Christian König <ckoenig.leichtzumerken@...il.com>
Cc:     amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Christian König <Christian.Koenig@....com>,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: BUG: KASAN: null-ptr-deref in drm_sched_job_cleanup+0x96/0x290 [gpu_sched]

On Wed, Apr 19, 2023 at 1:12 PM Christian König
<ckoenig.leichtzumerken@...il.com> wrote:
>
> I'm already looking into this, but can't figure out why we run into
> problems here.
>
> What happens is that a CS is aborted without sending the job to the
> scheduler and in this case the cleanup function doesn't seem to work.
>
> Christian.

I can easily reproduce it on any AMD GPU hardware.
You can add more logs to debug and I return with new logs which explains this.
Thanks.

-- 
Best Regards,
Mike Gavrilov.