linux-kernel - Re: [PATCH 02/12] powerpc/module: Mark module stubs with a magic value

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: <20160225131727.GD21932@lst.de>
Date:	Thu, 25 Feb 2016 14:17:27 +0100
From:	Torsten Duwe <duwe@....de>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	linuxppc-dev@...abs.org, bsingharora@...il.com,
	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	kamalesh@...ux.vnet.ibm.com, pmladek@...e.com, jeyu@...hat.com,
	jkosina@...e.cz, live-patching@...r.kernel.org, mbenes@...e.cz
Subject: Re: [PATCH 02/12] powerpc/module: Mark module stubs with a magic
	value

On Thu, Feb 25, 2016 at 01:28:25AM +1100, Michael Ellerman wrote:
> 
> We can make that process easier by marking the generated stubs with a
> magic value, and then looking for that magic value. Altough this is not
> as rigorous as the current method, I believe it is sufficient in
> practice.

The actual magic value is sort of debatable; it should be "improbable"
enough. But this can be changed easily, for each kernel compile, even.

> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Reviewed-by: Torsten Duwe <duwe@...e.de>

[for reference:]
>  
> +#define STUB_MAGIC 0x73747562 /* stub */
> +

	Torsten