Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <CABXGCsPiR4Lwd0NTecp8GMN9YVLU4OXTiHm-z7Gsa_4-LEm1ZQ@mail.gmail.com>
In-Reply-To: <CABXGCsPiR4Lwd0NTecp8GMN9YVLU4OXTiHm-z7Gsa_4-LEm1ZQ@mail.gmail.com>
From:   Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Date:   Mon, 8 May 2023 15:40:08 +0500
Message-ID: <CABXGCsOWCp=KYFFvWA6ExUotUJe=YViZEsomqkCJb7dwNUFAwg@mail.gmail.com>
Subject: Re: KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
 - RIP: 0010:amdgpu_bo_get_memory+0x80/0x360 [amdgpu]
To:     "Olsak, Marek" <Marek.Olsak@amd.com>,
        =?UTF-8?Q?Christian_K=C3=B6nig?= <Christian.Koenig@amd.com>,
        "Deucher, Alexander" <Alexander.Deucher@amd.com>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Fri, May 5, 2023 at 6:44=E2=80=AFPM Mikhail Gavrilov
<mikhail.v.gavrilov@gmail.com> wrote:
> I need to say that it may not be easy to reproduce this bug.
> For helping reproduce:
> 1. I looped script above:
> $ for i in {1..99999}; do sudo curl -s
> https://raw.githubusercontent.com/fatso83/dotfiles/master/utils/scripts/i=
notify-consumers
> | bash; done
> 2. Launched google chrome with 26 opened windows
> 3. And played in the game Division 2.
> A little time and luck and I get the desired backtrace again and again.
>
> I am ready to answer any question and open for testing any patches.
> Thanks.

No one can reproduce this?
I prepared a video instruction which can helps:
https://youtu.be/0ipQnMpZG1Y

1. Run script which would calculate watchers:
$ for i in {1..99999}; do sudo curl -s
https://raw.githubusercontent.com/fatso83/dotfiles/master/utils/scripts/ino=
tify-consumers
| bash; done

2. Run the game "Devision 2"

3. Run 20 windows of Google Chrome with such script
$ for i in {1..20}; do google-chrome-unstable
--profile-directory=3D"Test-2" --new-window --start-maximized
"youtube.com" &; done

I hope after it you see the desired backtrace.

--=20
Best Regards,
Mike Gavrilov.