linux-kernel - Re: [tip: objtool/core] objtool: Use sh_info to find the base for .rela sections

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: <20200616192749.GB2531@hirez.programming.kicks-ass.net>
Date:   Tue, 16 Jun 2020 21:27:49 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>, x86 <x86@...nel.org>,
        linux-tip-commits@...r.kernel.org,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Kristen Carlson Accardi <kristen@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [tip: objtool/core] objtool: Use sh_info to find the base for
 .rela sections

On Tue, Jun 16, 2020 at 11:00:59AM -0700, Kees Cook wrote:
> On Wed, Apr 22, 2020 at 10:24:44PM -0000, tip-bot2 for Sami Tolvanen wrote:
> > The following commit has been merged into the objtool/core branch of tip:
> > 
> > Commit-ID:     e2ccbff8f02d6b140b8ee71108264686c19b1c78
> > Gitweb:        https://git.kernel.org/tip/e2ccbff8f02d6b140b8ee71108264686c19b1c78
> > Author:        Sami Tolvanen <samitolvanen@...gle.com>
> > AuthorDate:    Tue, 21 Apr 2020 11:25:01 -07:00
> > Committer:     Josh Poimboeuf <jpoimboe@...hat.com>
> > CommitterDate: Tue, 21 Apr 2020 18:49:15 -05:00
> > 
> > objtool: Use sh_info to find the base for .rela sections
> > 
> > ELF doesn't require .rela section names to match the base section. Use
> > the section index in sh_info to find the section instead of looking it
> > up by name.
> > 
> > LLD, for example, generates a .rela section that doesn't match the base
> > section name when we merge sections in a linker script for a binary
> > compiled with -ffunction-sections.
> > 
> > Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
> > Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
> > Reviewed-by: Kees Cook <keescook@...omium.org>
> 
> Hi!
> 
> Where did this commit end up? It seems to have vanished (404 on the
> Gitweb link) and isn't in -next nor Linus's tree.
> 
> This is needed for LTO, FGKASLR, and link speed improvements[1]. Is it
> possible to get this landed in -rc2 so all the things depending on it
> can rebase happily?

I can't remember why this happened, however I think this patch is in
josh's objtool tree that I was going to stick in objtool/core
tomorrow-ish.

Are those things you mentioned still slated for this release?