linux-kernel - Re: [PATCH] livepatch: Make livepatch dependent on !TRIM_UNUSED

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: <20170526174149.hoitvayd3zymlzaq@treble>
Date:   Fri, 26 May 2017 12:41:49 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Miroslav Benes <mbenes@...e.cz>
Cc:     jeyu@...hat.com, jikos@...nel.org, mmarek@...e.com,
        pmladek@...e.com, jmoreira@...e.de, live-patching@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] livepatch: Make livepatch dependent on !TRIM_UNUSED_KSYMS

On Fri, May 26, 2017 at 02:45:21PM +0200, Miroslav Benes wrote:
> If TRIM_UNUSED_KSYMS is enabled, all unneeded exported symbols are made
> unexported. Two-pass build of the kernel is done to find out which
> symbols are needed based on a configuration. This effectively
> complicates things for out-of-tree modules.
> 
> Livepatch exports functions to (un)register and enable/disable a live
> patch. The only in-tree module which uses these functions is a sample in
> samples/livepatch/. If the sample is disabled, the functions are
> trimmed and out-of-tree live patches cannot be built.
> 
> Note that live patches are intended to be built out-of-tree.
> 
> Suggested-by: Michal Marek <mmarek@...e.com>
> Signed-off-by: Miroslav Benes <mbenes@...e.cz>

Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>

-- 
Josh