Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Zhouyi Zhou <zhouzhouyi@gmail.com>
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>
Subject: Re: BUG : PowerPC RCU: torture test failed with __stack_chk_fail
In-Reply-To: <CAABZP2xVCQhizytn4H9Co7OU3UCSb_qNJaOszOawUFpeo=qpWQ@mail.gmail.com>
References: <CAABZP2xJRGhPmfB-PrfesQKzP7fsuZsj+3TewAiLLW8u=YK4dg@mail.gmail.com>
 <87cz3tylwx.fsf@mail.concordia>
 <CAABZP2zr=jypD7w_o18o95QEj1nkFugLcNH5sbuSAY-caBQoeQ@mail.gmail.com>
 <CAABZP2xVCQhizytn4H9Co7OU3UCSb_qNJaOszOawUFpeo=qpWQ@mail.gmail.com>
Date:   Thu, 27 Apr 2023 13:09:06 +1000
Message-ID: <87v8hixbql.fsf@mail.concordia>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

Zhouyi Zhou <zhouzhouyi@gmail.com> writes:
> On Tue, Apr 25, 2023 at 2:01=E2=80=AFPM Zhouyi Zhou <zhouzhouyi@gmail.com=
> wrote:
>> On Tue, Apr 25, 2023 at 6:07=E2=80=AFAM Michael Ellerman <mpe@ellerman.i=
d.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/ppc64l=
e/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.

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.

There's=20