linux-kernel - Re: [next] arm64: boot failed

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Date:   Tue, 7 Jun 2022 20:59:37 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Shakeel Butt <shakeelb@...gle.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        regressions@...ts.linux.dev, lkft-triage@...ts.linaro.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Raghuram Thammiraju <raghuram.thammiraju@....com>,
        Mark Brown <broonie@...nel.org>, Will Deacon <will@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Vasily Averin <vvs@...nvz.org>,
        Qian Cai <quic_qiancai@...cinc.com>
Subject: Re: [next] arm64: boot failed - next-20220606

On Tue, 7 Jun 2022 at 19:47, Shakeel Butt <shakeelb@...gle.com> wrote:
>
> On Tue, Jun 7, 2022 at 3:28 AM Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
> >
> > Hi Shakeel,
> >
> > > > > Can you test v5.19-rc1, please?  If that does not fail, then you could
> > > > > bisect between that and next-20220606 ...
> > > > >
> > > >
> > > > This is already reported at
> > > > https://lore.kernel.org/all/Yp4F6n2Ie32re7Ed@qian/ and I think we know
> > > > the underlying issue (which is calling virt_to_page() on a vmalloc
> > > > address).
> > >
> > > Sorry, I might be wrong. Just checked the stacktrace again and it
> > > seems like the failure is happening in early boot in this report.
> > > Though the error "Unable to handle kernel paging request at virtual
> > > address" is happening in the function mem_cgroup_from_obj().
> > >
> > > Naresh, can you repro the issue if you revert the patch "net: set
> > > proper memcg for net_init hooks allocations"?
> >
> > yes. You are right !
> > 19ee3818b7c6 ("net: set proper memcg for net_init hooks allocations")
> > After reverting this single commit I am able to boot arm64 successfully.
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> >
>
> Can you please run script/faddr2line on "mem_cgroup_from_obj+0x2c/0x120"?

./scripts/faddr2line vmlinux  mem_cgroup_from_obj+0x2c/0x120
mem_cgroup_from_obj+0x2c/0x120:
mem_cgroup_from_obj at ??:?

Please find the following artifacts which are causing kernel crashes.

vmlinux: https://builds.tuxbuild.com/2ABl8X9kHAAU5MlL3E3xExHFrNy/vmlinux.xz
System.map: https://builds.tuxbuild.com/2ABl8X9kHAAU5MlL3E3xExHFrNy/System.map


- Naresh