linux-kernel - Re: How to disable Linux kernel self-extraction (KERNEL_GZIP, KERNEL

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: <20180424095555.GA11868@amd>
Date:   Tue, 24 Apr 2018 11:55:55 +0200
From:   Pavel Machek <pavel@....cz>
To:     Adam Borowski <kilobyte@...band.pl>
Cc:     Paul Menzel <pmenzel+linux-kernel@...gen.mpg.de>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: How to disable Linux kernel self-extraction (KERNEL_GZIP, KERNEL_BZIP2, …)?

Hi!

> > Actually... Compressors usually have a mode when they store the data
> > uncompressed. So you should be able to prepare .gz image which is not
> > really compressed inside, and thus really fast to uncompress.
> 
> I can't seem to find any.  IIRC xz format can store uncompressed blocks but
> the tool doesn't appear to expose this as an option.

I believe most compressors should be able to do that. But yes, that
option would need to be exported.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)