linux-kernel - Re: kaslr should avoid setup

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140424025016.GB2180@darkstar.nay.redhat.com>
Date:	Thu, 24 Apr 2014 10:50:16 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kaslr should avoid setup_data region

On 04/23/14 at 07:43pm, Kees Cook wrote:
> On Wed, Apr 23, 2014 at 7:35 PM, Dave Young <dyoung@...hat.com> wrote:
> > Hello Kees
> >
> > I'm worrying that setup_data regions could be overwitten by randomize
> > kernel base. Would you like to fix it in kaslr code?
> >
> > One problem is there could be a lot of setup_data regions but current
> > mem_avoid is an fixed array.
> 
> Sure, can you give me some examples? Seems like it shouldn't be too
> hard to have the mem_avoid logic walk additional areas.

Great, To walk through the list just like the function parse_setup_data in
arch/x86/kernel/setup.c

Thanks
Dave
--
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/