From owner-svn-src-all@FreeBSD.ORG Sun Dec 14 15:22:02 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A8F9EBD9; Sun, 14 Dec 2014 15:22:02 +0000 (UTC) Received: from tensor.andric.com (unknown [IPv6:2001:7b8:3a7:1:2d0:b7ff:fea0:8c26]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "tensor.andric.com", Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5FF6E853; Sun, 14 Dec 2014 15:22:02 +0000 (UTC) Received: from [IPv6:2001:7b8:3a7::ec02:9330:f41e:f824] (unknown [IPv6:2001:7b8:3a7:0:ec02:9330:f41e:f824]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by tensor.andric.com (Postfix) with ESMTPSA id 6EDDDB80A; Sun, 14 Dec 2014 16:21:57 +0100 (CET) Subject: Re: svn commit: r275742 - in stable: 10/contrib/llvm/lib/Transforms/Vectorize 10/sys/sys 9/contrib/llvm/lib/Transforms/Vectorize 9/sys/sys Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) Content-Type: multipart/signed; boundary="Apple-Mail=_279BC7EC-83DD-4B3C-81FD-833658439F75"; protocol="application/pgp-signature"; micalg=pgp-sha1 X-Pgp-Agent: GPGMail 2.5b3 From: Dimitry Andric In-Reply-To: <20141214151719.GB76347@FreeBSD.org> Date: Sun, 14 Dec 2014 16:21:52 +0100 Message-Id: References: <201412131214.sBDCESwJ033037@svn.freebsd.org> <548DA4A3.8020000@freebsd.org> <43A88D44-A799-46AB-8853-560407BABC84@FreeBSD.org> <20141214151719.GB76347@FreeBSD.org> To: Alexey Dokuchaev X-Mailer: Apple Mail (2.1993) Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Steven Hartland , svn-src-stable-10@freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Dec 2014 15:22:02 -0000 --Apple-Mail=_279BC7EC-83DD-4B3C-81FD-833658439F75 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii On 14 Dec 2014, at 16:17, Alexey Dokuchaev wrote: > > On Sun, Dec 14, 2014 at 04:11:09PM +0100, Dimitry Andric wrote: >> Yes, this is quite nasty, and it does affect 10.1-RELEASE, 9.3-RELEASE, >> and any other release with clang 3.4.x, which turned on the vectorizer >> by default. > > Could it be the cause of "REDZONE: Buffer overflow detected. 16 bytes > corrupted after 0xd2375200 (256 bytes allocated)" bug reported by dhw@ > WRT nvidia-driver-340.46 on 2014-11-18 [1]? This is extremely unlikely, since the kernel is compiled without SSE. (The bug was in the vectorizer, which transforms loops into SSE constructs.) Does this problem disappear when both the kernel and the NVIDIA kernel module are compiled with -O1? -Dimitry --Apple-Mail=_279BC7EC-83DD-4B3C-81FD-833658439F75 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.26 iEYEARECAAYFAlSNqxYACgkQsF6jCi4glqNbqgCcCH9cA6OQGJwJ8flg79jd4m3N iQcAoL2TT2QnQ+m9Hr3W8gvlbLSABrS0 =q+b5 -----END PGP SIGNATURE----- --Apple-Mail=_279BC7EC-83DD-4B3C-81FD-833658439F75--