linux-kernel - Re: [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S

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: <20200113163855.GK13310@zn.tnic>
Date:   Mon, 13 Jan 2020 17:38:55 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Arvind Sankar <nivedita@...m.mit.edu>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Thomas Lendacky <Thomas.Lendacky@....com>,
        Michael Matz <matz@...e.de>
Subject: Re: [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve
 to S_REL

On Mon, Jan 13, 2020 at 11:13:10AM -0500, Arvind Sankar wrote:
> I will note that the purpose of S_REL in relocs.c was originally to
> handle exactly this case of symbols defined outside output sections:

And we should try not to do hacks, if it can be fixed properly, as
binutils expects symbols to be usually relative to a section.

> How to reproduce is just "build with old binutils". I don't see it's
> reasonable to include a tutorial on how to build the kernel with a
> toolchain that's not installed in the default PATH, as part of the commit
> message.

The point is that it should be clear that it should state whether it is
something you trigger with some stock distro which has been shipping
this way or it is something you've customly created. Huge difference.

So pls make sure that is clear from the commit message.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette