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From:   Zhouyi Zhou <zhouzhouyi@gmail.com>
Date:   Thu, 27 Apr 2023 11:32:47 +0800
Message-ID: <CAABZP2x4SiDHOCweNcanxj6v-KYmVct9E8PVUr1pxFvR4gPGqQ@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 Thu, Apr 27, 2023 at 11:09=E2=80=AFAM Michael Ellerman <mpe@ellerman.id.=
au> wrote:
>
> Zhouyi Zhou <zhouzhouyi@gmail.com> writes:
> > On Tue, Apr 25, 2023 at 2:01=E2=80=AFPM Zhouyi Zhou <zhouzhouyi@gmail.c=
om> wrote:
> >> On Tue, Apr 25, 2023 at 6:07=E2=80=AFAM Michael Ellerman <mpe@ellerman=
.id.au> wrote:
> ...
> >> >
> >> > 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/ppc6=
4le/12.2.0/
>
> > powerpc64le-linux-gnu-gcc-12 cross compiler on my Ubuntu 22.04 does
> > not seem to have that issue as gcc-10 does
>
> OK. So so far it's only that GCC 10 that shows the problem.
The default gcc version 9.4.0 in ubuntu 20.04 (in VM of Oregon State
University) also shows the problem.
>
> If you have time, you could use some of the other versions to narrow
> down which versions show the bug:
>
>   https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/ppc64le/
>
> There's an 11.0, 11.1 and 11.3 there, as well as 9.5 and so on.
I have time ;-), and am very glad to try the above versions to narrow
down which version shows the bug ;-)

Cheers
Zhouyi
>
> There's