linux-kernel - Re: [PATCH 00/15] kasan: x86: arm64: risc-v: KASAN tag-based mode for x86

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Message-ID: <CAMj1kXHktLC2F=suQoNF80-ZQ93-3pxWz20_L76_6morUGPaNQ@mail.gmail.com>
Date: Thu, 6 Feb 2025 00:04:17 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: "Christoph Lameter (Ampere)" <cl@...two.org>
Cc: Dave Hansen <dave.hansen@...el.com>, 
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>, luto@...nel.org, xin@...or.com, 
	kirill.shutemov@...ux.intel.com, palmer@...belt.com, tj@...nel.org, 
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Subject: Re: [PATCH 00/15] kasan: x86: arm64: risc-v: KASAN tag-based mode for x86

On Wed, 5 Feb 2025 at 20:31, Christoph Lameter (Ampere) <cl@...two.org> wrote:
>
> MTE tagging is part of the processor standard for ARM64 and Linux will
> need to support the 16 byte tagging feature one way or another even if
> Intel does not like it. And AFAICT hardware tagging support is a critical
> security feature for the future.
>

Can you explain what you feel is lacking in the existing MTE support
in KAsan (enabled when selecting CONFIG_KASAN_HW_TAGS)?