From: David Airlie <airlied@redhat.com>
To: Kim Phillips <kim.phillips@amd.com>
Cc: Ainux <ainux.wang@gmail.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
airlied <airlied@linux.ie>, "Vetter, Daniel" <daniel@ffwll.ch>,
sterlingteng@gmail.com, chenhuacai@kernel.org,
dri-devel <dri-devel@lists.freedesktop.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: BUG: KASAN: use-after-free in enqueue_timer+0x4f/0x1e0
Date: Tue, 12 Oct 2021 11:48:24 +1000 [thread overview]
Message-ID: <CAMwc25o9wSPd4PgS56j7GApcFYE=ZY9LHpiFvtE6RVgdQKzBFA@mail.gmail.com> (raw)
In-Reply-To: <a6d2d16c-173f-d49b-ec54-defd6be2bb0c@amd.com>
On Tue, Oct 12, 2021 at 2:07 AM Kim Phillips <kim.phillips@amd.com> wrote:
>
> Hi,
>
> On 10/5/21 1:10 PM, Kim Phillips wrote:
> > Hi, I occasionally see the below trace with Linus' master on an
> > AMD Milan system:
> >
> > [ 25.657322] BUG: kernel NULL pointer dereference, address: 0000000000000000
> > [ 25.665097] #PF: supervisor instruction fetch in kernel mode
> > [ 25.671448] #PF: error_code(0x0010) - not-present page
> <snip>
> > That bisection led to this commit:
> >
> > commit aae74ff9caa8de9a45ae2e46068c417817392a26
> > Author: Ainux <ainux.wang@gmail.com>
> > Date: Wed May 26 19:15:15 2021 +0800
> > drm/ast: Add detect function support
> <snip>
> > I confirmed that if I revert it from v5.15-rc4 (after reverting
> > its dependent 572994bf18ff "drm/ast: Zero is missing in detect
> > function"), the problem goes away.
> >
> > Full .config, dmesg attached.
> >
> > I can test any possible fixes...
>
>
> Ping - if no fixes are in the works, can the offending commit(s)
> be reverted?
tzimmermann?
Dave.
prev parent reply other threads:[~2021-10-12 1:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 18:10 BUG: KASAN: use-after-free in enqueue_timer+0x4f/0x1e0 Kim Phillips
2021-10-11 16:07 ` Kim Phillips
2021-10-12 1:48 ` David Airlie [this message]
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