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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Tue, 30 Mar 2021 09:11:23 -0700
Message-ID: <CAHk-=whHhEQW52FYV+J68Z+OZd5tUPv=Fa_o06n9Jj5J4wJU4w@mail.gmail.com>
Subject: Re: exec error: BUG: Bad rss-counter
To:     Zhou Yanjie <zhouyanjie@wanyeetech.com>
Cc:     Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Linux-MM <linux-mm@kvack.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Christoph Hellwig <hch@lst.de>
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On Mon, Mar 29, 2021 at 9:56 PM Zhou Yanjie <zhouyanjie@wanyeetech.com> wro=
te:
>
> On 2021/3/29 =E4=B8=8A=E5=8D=8810:48, Ilya Lipnitskiy wrote:
> >
> > Try:
> > diff --git a/mm/memory.c b/mm/memory.c
> > index c8e357627318..1fd753245369 100644
> > --- a/mm/memory.c
> > +++ b/mm/memory.c
> > @@ -166,7 +166,7 @@ static int __init init_zero_pfn(void)
> >          zero_pfn =3D page_to_pfn(ZERO_PAGE(0));
> >          return 0;
> >   }
> > -core_initcall(init_zero_pfn);
> > +early_initcall(init_zero_pfn);
>
> It works, thanks!

Looks good to me - init_zero_pfn() can be called early, because it
depends on paging_init() will should have happened long before any
initcalls in setup_arch().

Ilya, mind sending a signed-off version with a nice commit message,
and I'll apply it.

             Linus