linux-kernel - Re: [PATCH v7 3/4] atomic: Add alignment check to instrumented atomic operations

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] [day] [month] [year] [list]

Message-ID: <20260114130703.GC830755@noisy.programming.kicks-ass.net>
Date: Wed, 14 Jan 2026 14:07:03 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Finn Thain <fthain@...ux-m68k.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Mark Rutland <mark.rutland@....com>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
	Sasha Levin <sashal@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Ard Biesheuvel <ardb@...nel.org>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v7 3/4] atomic: Add alignment check to instrumented
 atomic operations

On Tue, Jan 13, 2026 at 04:22:28PM +1100, Finn Thain wrote:
> From: Peter Zijlstra <peterz@...radead.org>
> 
> Add a Kconfig option for debug builds which logs a warning when an
> instrumented atomic operation takes place that's misaligned.
> Some platforms don't trap for this.
> 
> [ fthain: added __DISABLE_EXPORTS conditional and refactored as helper
> function. ]
> 
> Cc: Sasha Levin <sashal@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: Ard Biesheuvel <ardb@...nel.org>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Link: https://lore.kernel.org/lkml/20250901093600.GF4067720@noisy.programming.kicks-ass.net/
> Link: https://lore.kernel.org/linux-next/df9fbd22-a648-ada4-fee0-68fe4325ff82@linux-m68k.org/
> Signed-off-by: Finn Thain <fthain@...ux-m68k.org>
> 
> ---
> Checkpatch.pl says...
> ERROR: Missing Signed-off-by: line by nominal patch author 'Peter Ziljstra <peterz@...radead.org>'

Feel free to add:

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>