linux-kernel - Re: [next] arm: Internal error: Oops: 5 PC is at __read_once_word

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Message-ID: <CA+G9fYuO-sy+sZnhSz=A7Xm0LdSp2AT+7jCKLB33tZzK4izj3g@mail.gmail.com>
Date:   Fri, 11 Mar 2022 03:20:02 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     "Russell King (Oracle)" <linux@...linux.org.uk>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [next] arm: Internal error: Oops: 5 PC is at __read_once_word_nocheck

On Fri, 11 Mar 2022 at 02:55, Ard Biesheuvel <ardb@...nel.org> wrote:
>
> On Thu, 10 Mar 2022 at 22:18, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
> >
> > Hi Ard and Russell,
> >
> > The boot test pass on linux next-20220310 tag with  KASAN=y on BeagleBoard x15
> > device. but LTP cve tests reproduced the reported kernel crash  [1].
> > From the available historical data I can confirm that this is an
> > intermittent issue on
> > BeagleBoard x15 devices.
> >
> > OTOH, the kernel crash is always reproducible on qemu-arm with KASAN=y
> > while booting which has been known to fail for a long time.
> >
> > From the Ardb tree I have boot tested qemu-arm with KASAN=y the reported
> > kernel crash is always reproducible.
> >
> > The build steps [3] and extra Kconfigs.
> >
> > - Naresh
> > [1] https://lkft.validation.linaro.org/scheduler/job/4701310
> > [2] https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/log/
> > [3] https://builds.tuxbuild.com/2661dIAPUjE2DMJvye91He2gus0/tuxmake_reproducer.sh
>
> Thanks Naresh. I'm having trouble to make sense of this, though. The
> linked output log appears to be from a build that lacks my 'ARM:
> entry: fix unwinder problems caused by IRQ stacks' patch, as it
> doesn't show any occurrences of call_with_stack() on any of the call
> stacks.
>
> Do you have a link to the vmlinux and zImage files for this build?

Yes.

vmlinux.xz:  https://builds.tuxbuild.com/26BmIasJnAyCii0SkgbKarkF369/vmlinux.xz
zImage: https://builds.tuxbuild.com/26BmIasJnAyCii0SkgbKarkF369/zImage
System.map: https://builds.tuxbuild.com/26BmIasJnAyCii0SkgbKarkF369/System.map
Build log: https://builds.tuxbuild.com/26BmIasJnAyCii0SkgbKarkF369/

- Naresh