linux-kernel - Re: BUG : PowerPC RCU: torture test failed with __stack_chk

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Date:   Tue, 25 Apr 2023 06:13:03 +0800
From:   Zhouyi Zhou <zhouzhouyi@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        rcu <rcu@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>, lance@...osl.org,
        "Paul E. McKenney" <paulmck@...nel.org>
Subject: Re: BUG : PowerPC RCU: torture test failed with __stack_chk_fail

On Tue, Apr 25, 2023 at 6:07 AM Michael Ellerman <mpe@...erman.id.au> wrote:
>
> Zhouyi Zhou <zhouzhouyi@...il.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="powerpc64le-linux-gnu-gcc-10 (Ubuntu 10.4.0-4ubuntu1~22.04) 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/12.2.0/
>
> 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