linux-kernel - Re: [PATCH 6.9 000/281] 6.9.6-rc1 review

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Date: Thu, 20 Jun 2024 18:44:11 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org, 
	akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org, 
	patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de, 
	jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com, 
	srw@...dewatkins.net, rwarsow@....de, conor@...nel.org, allen.lkml@...il.com, 
	broonie@...nel.org, Miaohe Lin <linmiaohe@...wei.com>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, David Hildenbrand <david@...hat.com>, 
	Cgroups <cgroups@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, jbeulich@...e.com, 
	LTP List <ltp@...ts.linux.it>
Subject: Re: [PATCH 6.9 000/281] 6.9.6-rc1 review

On Thu, 20 Jun 2024 at 17:59, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Thu, Jun 20, 2024 at 05:21:09PM +0530, Naresh Kamboju wrote:
> > On Wed, 19 Jun 2024 at 18:41, Greg Kroah-Hartman
> > <gregkh@...uxfoundation.org> wrote:
> > >
> > > This is the start of the stable review cycle for the 6.9.6 release.
> > > There are 281 patches in this series, all will be posted as a response
> > > to this one.  If anyone has any issues with these being applied, please
> > > let me know.
> > >
> > > Responses should be made by Fri, 21 Jun 2024 12:55:11 +0000.
> > > Anything received after that time might be too late.
> > >
> > > The whole patch series can be found in one patch at:
> > >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.9.6-rc1.gz
> > > or in the git tree and branch at:
> > >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.9.y
> > > and the diffstat can be found below.
> > >
> > > thanks,
> > >
> > > greg k-h
> >
> > There are two major issues on arm64 Juno-r2 on Linux stable-rc 6.9.6-rc1
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> >
> > 1)
> > The LTP controllers cgroup_fj_stress test cases causing kernel crash
> > on arm64 Juno-r2 with
> > compat mode testing with stable-rc 6.9 kernel.
> >
> > In the recent past I have reported this issues on Linux mainline.
> >
> > LTP: fork13: kernel panic on rk3399-rock-pi-4 running mainline 6.10.rc3
> >   - https://lore.kernel.org/all/CA+G9fYvKmr84WzTArmfaypKM9+=Aw0uXCtuUKHQKFCNMGJyOgQ@mail.gmail.com/
> >
> > it goes like this,
> >   Unable to handle kernel NULL pointer dereference at virtual address
> >   ...
> >   Insufficient stack space to handle exception!
> >   end Kernel panic - not syncing: kernel stack overflow
> >
> > 2)
> > The LTP controllers cgroup_fj_stress test suite causing kernel oops on
> > arm64 Juno-r2 (with the clang-night build toolchain).
> >   Unable to handle kernel NULL pointer dereference at virtual address
> > 0000000000000009
> >   Internal error: Oops: 0000000096000044 [#1] PREEMPT SMP
> >   pc : xprt_alloc_slot+0x54/0x1c8
> >   lr : xprt_alloc_slot+0x30/0x1c8
>
> And these are regressions?  Any chance to run 'git bisect'?

it's difficult to reproduce the first one so we haven't been able to bisect it.
It seemd like David and Baolin might have an idea what's causing it.

- Naresh