linux-kernel - Re: 6.17 crashes in ipv6 code when booted fips=1 [was: [GIT PULL] Crypto Update for 6.17]

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Message-ID: <CAHk-=wjcXn+uPu8h554YFyZqfkoF=K4+tFFtXHsWNzqftShdbQ@mail.gmail.com>
Date: Mon, 6 Oct 2025 09:19:18 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Vegard Nossum <vegard.nossum@...cle.com>
Cc: Eric Biggers <ebiggers@...nel.org>, Jiri Slaby <jirislaby@...nel.org>, 
	Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller" <davem@...emloft.net>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, 
	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>, netdev@...r.kernel.org, 
	Jakub Kicinski <kuba@...nel.org>, "Theodore Ts'o" <tytso@....edu>, "nstange@...e.de" <nstange@...e.de>, 
	"Wang, Jay" <wanjay@...zon.com>
Subject: Re: 6.17 crashes in ipv6 code when booted fips=1 [was: [GIT PULL]
 Crypto Update for 6.17]

On Mon, 6 Oct 2025 at 04:53, Vegard Nossum <vegard.nossum@...cle.com> wrote:
>
> I'm pretty sure the use of SHA-1/HMAC inside IPv6 segment routing counts
> as a "security function" (as it is used for message authentication) and
> thus should be subject to FIPS requirements when booting with fips=1.

I think the other way of writing that is "fips=1 is and will remain
irrelevant in the real world as long as it's that black-and-white".

             Linus