linux-kernel - Re: [PATCH v4 0/7] x86/boot: Remove runtime relocations from compressed kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+icZUV45bAExLaUAPkiJEC-kOYw2vMWUrDpy_9XNPeK7WB4qQ@mail.gmail.com>
Date:   Tue, 14 Jul 2020 22:17:33 +0200
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Arvind Sankar <nivedita@...m.mit.edu>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Fangrui Song <maskray@...gle.com>,
        Dmitry Golovin <dima@...ovin.in>,
        Clang-Built-Linux ML <clang-built-linux@...glegroups.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Daniel Kiper <daniel.kiper@...cle.com>,
        Kees Cook <keescook@...omium.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        "H . J . Lu" <hjl@...rceware.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/7] x86/boot: Remove runtime relocations from
 compressed kernel

On Tue, Jul 14, 2020 at 10:14 PM Arvind Sankar <nivedita@...m.mit.edu> wrote:
>
> On Tue, Jul 14, 2020 at 10:10:14PM +0200, Sedat Dilek wrote:
> > On Tue, Jul 14, 2020 at 10:07 PM Arvind Sankar <nivedita@...m.mit.edu> wrote:
> > >
> > > On Tue, Jul 14, 2020 at 09:53:19PM +0200, Sedat Dilek wrote:
> > > >
> > > > Hmm, you might be right with moving to LDFLAGS_vmlinux.
> > > >
> > > > Attached are my linux-config and dmesg-output.
> > > >
> > > > - Sedat -
> > >
> > > Which tree are you building against? I notice you have KERNEL_ZSTD
> > > enabled, which hasn't been merged yet.
> > >
> > > Are you using Nick's series [v7]?
> > >
> > > Also from the naming -- are you using LLVM_IAS=1 with some patches to
> > > make it work?
> > >
> > > [v7] https://lore.kernel.org/lkml/20200708185024.2767937-1-nickrterrell@gmail.com/
> >
> > Sorry for not telling you the full story.
> > Yes, I have some additional patches like Nick T. "zstd-v7" which
> > should IMHO not touch this area.
> >
> > - Sedat -
>
> That series does touch boot/compressed, since the point is to add
> support for zstd-compressed kernels. I'll need to test it out, the
> __DISABLE_EXPORTS he's now using must not be working for some reason.

I have seen this in the between zstd-v6 and zstd-v7 - diff attached.

- Sedat -

View attachment "zstd-initramfs-terrelln-v6-VS-zstd-initramfs-terrelln-v7.diff" of type "text/x-patch" (7050 bytes)