linux-kernel - Re: [tip: x86/build] x86/boot: Add back some padding for the CRC-32 checksum

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: <20250414135625.GDZ_0UCcIQ-fg8DKZL@fat_crate.local>
Date: Mon, 14 Apr 2025 15:56:25 +0200
From: Borislav Petkov <bp@...en8.de>
To: linux-kernel@...r.kernel.org
Cc: linux-tip-commits@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Ard Biesheuvel <ardb@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	Ian Campbell <ijc@...lion.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org
Subject: Re: [tip: x86/build] x86/boot: Add back some padding for the CRC-32
 checksum

On Wed, Mar 12, 2025 at 12:09:34PM -0000, tip-bot2 for Ard Biesheuvel wrote:
> The following commit has been merged into the x86/build branch of tip:
> 
> Commit-ID:     e471a86a8c523eccdfd1c4745ed7ac7cbdcc1f3f
> Gitweb:        https://git.kernel.org/tip/e471a86a8c523eccdfd1c4745ed7ac7cbdcc1f3f
> Author:        Ard Biesheuvel <ardb@...nel.org>
> AuthorDate:    Wed, 12 Mar 2025 09:12:05 +01:00
> Committer:     Ingo Molnar <mingo@...nel.org>
> CommitterDate: Wed, 12 Mar 2025 13:04:52 +01:00
> 
> x86/boot: Add back some padding for the CRC-32 checksum
> 
> Even though no uses of the bzImage CRC-32 checksum are known, ensure
> that the last 4 bytes of the image are unused zero bytes, so that the
> checksum can be generated post-build if needed.

Sounds like it is not needed and sounds like we should whack this thing no?

Or are we doing a grace period and then whack it when that grace period
expires?

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette