linux-kernel - Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory

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]

Date:   Sun, 11 Nov 2018 08:45:57 -0500
From:   Masayoshi Mizuma <msys.mizuma@...il.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "H. Peter Anvin" <hpa@...or.com>, Baoquan He <bhe@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Chao Fan <fanc.fnst@...fujitsu.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-efi@...r.kernel.org, linux-acpi@...r.kernel.org,
        mingo@...hat.com, keescook@...omium.org, rjw@...ysocki.net,
        lenb@...nel.org, ard.biesheuvel@...aro.org,
        indou.takao@...fujitsu.com, caoj.fnst@...fujitsu.com
Subject: Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr
 in immovable memory

On Sat, Nov 10, 2018 at 11:54:22AM +0100, Borislav Petkov wrote:
> On Thu, Nov 08, 2018 at 11:51:29AM +0100, Borislav Petkov wrote:
> > A global definition which doesn't need allocation?
> > 
> > Maybe hpa would have another, better idea...
> 
> ...and he has: just put that address in a new field in struct
> boot_params by converting one of the padding arrays there.
> 
> Don't forget to document it in Documentation/x86/zero-page.txt
> 
> This way you don't need any of the allocation fun or to use setup_data
> at all.

Thanks!
I have the prototype patch to use boot_params [1].
I will try to brush up it.

[1] https://lore.kernel.org/lkml/20181016151353.punyk7exekut2543@gabell

Thanks,
Masa