From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B017C4338F for ; Wed, 11 Aug 2021 07:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1FCF60EBD for ; Wed, 11 Aug 2021 07:28:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235332AbhHKH3J (ORCPT ); Wed, 11 Aug 2021 03:29:09 -0400 Received: from jabberwock.ucw.cz ([46.255.230.98]:39902 "EHLO jabberwock.ucw.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231472AbhHKH3I (ORCPT ); Wed, 11 Aug 2021 03:29:08 -0400 Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 2A2F11C0B76; Wed, 11 Aug 2021 09:28:44 +0200 (CEST) Date: Wed, 11 Aug 2021 09:28:43 +0200 From: Pavel Machek To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, jason@jlekstrand.net, Jonathan Gray Subject: Re: [PATCH 5.10 125/135] drm/i915: avoid uninitialised var in eb_parse() Message-ID: <20210811072843.GC10829@duo.ucw.cz> References: <20210810172955.660225700@linuxfoundation.org> <20210810173000.050147269@linuxfoundation.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="iFRdW5/EC4oqxDHL" Content-Disposition: inline In-Reply-To: <20210810173000.050147269@linuxfoundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --iFRdW5/EC4oqxDHL Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > From: Jonathan Gray >=20 > The backport of c9d9fdbc108af8915d3f497bbdf3898bf8f321b8 to 5.10 in > 6976f3cf34a1a8b791c048bbaa411ebfe48666b1 removed more than it should > have leading to 'batch' being used uninitialised. The 5.13 backport and > the mainline commit did not remove the portion this patch adds back. This patch has no upstream equivalent, right? Which is okay -- it explains it in plain english, but it shows that scripts should not simply search for anything that looks like SHA and treat it as upsteam commit it. So let me re-iterate need for consistent marking of upstream commits. So far this works reasonably well, but selecting one format and sticking to it would be even better. ma =3D re.match(".*Upstream commit ([0-9a-f]*) .*", l) if ma: m.upstream =3D ma.group(1) ma =3D re.match("[Cc]ommit ([0-9a-f]*) upstream[.]*", l) if ma: m.upstream =3D ma.group(1) ma =3D re.match("[Cc]ommit: ([0-9a-f]*)", l) if ma: m.upstream =3D ma.group(1) Thanks and best regards, Pavel > Signed-off-by: Jonathan Gray > Fixes: 6976f3cf34a1 ("drm/i915: Revert "drm/i915/gem: Asynchronous cmdpar= ser"") > Cc: # 5.10 > Cc: Jason Ekstrand > Signed-off-by: Greg Kroah-Hartman > --- > drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 7 +++++++ > 1 file changed, 7 insertions(+) >=20 > --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > @@ -2351,6 +2351,12 @@ static int eb_parse(struct i915_execbuff > eb->batch_flags |=3D I915_DISPATCH_SECURE; > } > =20 > + batch =3D eb_dispatch_secure(eb, shadow); > + if (IS_ERR(batch)) { > + err =3D PTR_ERR(batch); > + goto err_trampoline; > + } > + > err =3D intel_engine_cmd_parser(eb->engine, > eb->batch->vma, > eb->batch_start_offset, > @@ -2377,6 +2383,7 @@ secure_batch: > err_unpin_batch: > if (batch) > i915_vma_unpin(batch); > +err_trampoline: > if (trampoline) > i915_vma_unpin(trampoline); > err_shadow: >=20 --=20 DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany --iFRdW5/EC4oqxDHL Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQRPfPO7r0eAhk010v0w5/Bqldv68gUCYRN8KwAKCRAw5/Bqldv6 8jBbAKCauBZgV5eO5Kezo/NR3t/5b6kB2wCeJ+0eyFa9mRtULm2hLeFAoRvDWQc= =jABX -----END PGP SIGNATURE----- --iFRdW5/EC4oqxDHL--