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Mon, 02 Jun 2025 17:17:27 -0700 (PDT) Date: Tue, 3 Jun 2025 00:17:26 +0000 From: Shawn Webb To: Robert Clausecker Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: e698e4a53773 - main - lib/libmd: disable SHA1 AVX2 kernel Message-ID: X-Operating-System: FreeBSD mutt-hbsd 14.2-STABLE-HBSD FreeBSD 14.2-STABLE-HBSD HARDENEDBSD-14-STABLE amd64 X-PGP-Key: https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/blob/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc References: <202506022333.552NX1uN061534@gitrepo.freebsd.org> List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="7vlczqi2qndlalfv" Content-Disposition: inline In-Reply-To: <202506022333.552NX1uN061534@gitrepo.freebsd.org> X-Rspamd-Queue-Id: 4bBB9j3MGQz3ck4 X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US] --7vlczqi2qndlalfv Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: git: e698e4a53773 - main - lib/libmd: disable SHA1 AVX2 kernel MIME-Version: 1.0 On Mon, Jun 02, 2025 at 11:33:01PM +0000, Robert Clausecker wrote: > The branch main has been updated by fuz: >=20 > URL: https://cgit.FreeBSD.org/src/commit/?id=3De698e4a537736f6a7dd9a386e0= 0997d7fb08e83f >=20 > commit e698e4a537736f6a7dd9a386e00997d7fb08e83f > Author: Robert Clausecker > AuthorDate: 2025-06-02 22:54:32 +0000 > Commit: Robert Clausecker > CommitDate: 2025-06-02 23:27:00 +0000 >=20 > lib/libmd: disable SHA1 AVX2 kernel > =20 > Seems like there is a bug lurking somewhere in the code. This was not > caught during my testing. Disable the affected kernel for now while I > figure out what is wrong with it. > =20 > To reproduce, run > =20 > jot -s '' -b 'a' -n 1000000 | sha1 > =20 > This should yield 34aa973cd4c4daa4f61eeb2bdbad27316534016f, but gives > fe161a71d7941e3d63a9cacadc4f20716a721944 with the broken code. Only = the > amd64/avx2 kernel is affected, the others seem to operate correctly. Out of curiosity, how would one best determine whether they're affected? Would it be a part of the CPU features shown in /var/run/dmesg.boot? Thanks, --=20 Shawn Webb Cofounder / Security Engineer HardenedBSD Signal Username: shawn_webb.74 Tor-ified Signal: +1 303-901-1600 / shawn_webb_opsec.50 https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A= 4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc --7vlczqi2qndlalfv Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEA6TL67gupaZ9nzhT/y5nonf44foFAmg+PxEACgkQ/y5nonf4 4fpiPA/+KrXy/8eXPiOJ8ICCPzYr/dhR3n+nk9mCLYlgc3lxTeA4xvhatBc8K9mY XYa6IRCQV4eDrF/6D4yap4YCjrxQUdB+hs9vszU/vMQdoaQJBgaMlW8q3ED7l0dz 3kVp8qT05pg7KhoHXkxlWyRimPxOfWOZ81m1Gp3083/Ji7IfttSR5rDQg6uH+6Nh ly+ZA+WryAqHq+jfDvPt6xbgPQjXKz4fPjNZ3gotVd7D0SU3S/9wfdJ09bwOY1VX kruJ/tNwkVMONAr+mvzwoFG8JQ8G+cmn4/pvT4QPRLe0cNzXsq78qt+0OicsKFxA 6R8CvqQ7+mjng2zOserfbP8tL4JKNGh9r6sn/nl8XpRYa17P8WyDtJ2UJfgl4oMa H7RXvmRH6WubSoQ4p0dY/nD2m7/A0ifRUJjdMC0wLKFeLywDuXIPrq3D4yml0iEv m3VIO1NtoPWBVMzzBtlqlhG09euuIIMG+MCNDu4C8v3p40n81kQ0JFpmK7ddD2MC fYIIkcfKDu8Xyql2wY6PddVi6SpD+6Ne1Zgc6dSqXpsatXC87+WOV6g5JkBpRjZ8 XMN4IjJlPKmTBVDHRI09Pa4O4dSiHyiKcAQeUIXOPyVI4wg8geTlEdkOXlKI7TZ8 zW7CDUHFLjbK7PdK0EIKNyZre/X6r3fU+dignbKOhmVVsbDge/4= =FCgL -----END PGP SIGNATURE----- --7vlczqi2qndlalfv--