linux-kernel - Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text

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: <46A61821.3070703@goop.org>
Date:	Tue, 24 Jul 2007 08:17:53 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
CC:	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	jbeulich@...ell.com, zach@...are.com, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected
 kernel text

Mathieu Desnoyers wrote:
> Hi Rusty,
>
> Good catch. I also still wonder why alternative (except alternative smp,
> which is ok) and paravirt patching functions are not marked __init. I really
> hope they are never used when NMI, MCE are enabled or when threads may
> have been preempted in the site being patched, or it could result in an
> illegal instruction.
>   

We need to patch modules at load time.  Presumably an NMI/MCE handler
will not depend on code in a being-loaded module.

    J
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/