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From:   Zhouyi Zhou <zhouzhouyi@gmail.com>
Date:   Tue, 25 Apr 2023 06:13:03 +0800
Message-ID: <CAABZP2zk2kpgocnGk_on3r3awyQcVyEtBQsby=brW=ciFSCYjA@mail.gmail.com>
Subject: Re: BUG : PowerPC RCU: torture test failed with __stack_chk_fail
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        rcu <rcu@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>, lance@osuosl.org,
        "Paul E. McKenney" <paulmck@kernel.org>
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On Tue, Apr 25, 2023 at 6:07=E2=80=AFAM Michael Ellerman <mpe@ellerman.id.a=
u> wrote:
>
> Zhouyi Zhou <zhouzhouyi@gmail.com> writes:
> > Dear PowerPC and RCU developers:
> > During the RCU torture test on mainline (on the VM of Opensource Lab
> > of Oregon State University), SRCU-P failed with __stack_chk_fail:
> ...
> > by debugging, I see the r10 is assigned with r13 on c000000000226eb4,
> > but if there is a context-switch before c000000000226edc, a false
> > positive will be reported.
> >
> > [1] http://154.220.3.115/logs/0422/configformainline.txt
>
> Says:
>
> CONFIG_CC_VERSION_TEXT=3D"powerpc64le-linux-gnu-gcc-10 (Ubuntu 10.4.0-4ub=
untu1~22.04) 10.4.0"
>
> Do you see the same issue with a newer GCC?
I would like to try that in the newest GCC ;-), please give me about a
day's time because I am going to compile the gcc ;-)
>
> There's 12.2.0 here:
>   https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/12=
.2.0/
>   https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/ppc64le/1=
2.2.0/
>
> Or if you can build in a Fedora 38 system or container, it has GCC 13.
OK, I will try it or similar

This is a very learningful process for me, thank you all ;-)

Cheers
>
> cheers