Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1163103AbbKTPgH (ORCPT ); Fri, 20 Nov 2015 10:36:07 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:43061 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760661AbbKTPgA (ORCPT ); Fri, 20 Nov 2015 10:36:00 -0500 Message-ID: <1448033753.89124.19.camel@infradead.org> Subject: Re: [PATCH 4/4] iommu/vt-d: Do access checks before calling handle_mm_fault() From: David Woodhouse To: Joerg Roedel , iommu@lists.linux-foundation.org Cc: Joerg Roedel , linux-kernel@vger.kernel.org, Jesse Barnes , Linus Torvalds Date: Fri, 20 Nov 2015 15:35:53 +0000 In-Reply-To: <1447773099-2444-5-git-send-email-joro@8bytes.org> References: <1447773099-2444-1-git-send-email-joro@8bytes.org> <1447773099-2444-5-git-send-email-joro@8bytes.org> Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-0wp7Ov6cNwfpaH7Nch61" X-Mailer: Evolution 3.18.1 (3.18.1-1.fc23) Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8895 Lines: 140 --=-0wp7Ov6cNwfpaH7Nch61 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2015-11-17 at 16:11 +0100, Joerg Roedel wrote: > From: Joerg Roedel >=20 > Not doing so is a bug and might trigger a BUG_ON in > handle_mm_fault(). So add the proper permission checks > before calling into mm code. >=20 > Signed-off-by: Joerg Roedel Acked-By: David Woodhouse As noted, I can't test it right now until I've replaced my test hardware. Certainly looks better than the last version though :) Thanks. --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation --=-0wp7Ov6cNwfpaH7Nch61 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIISjjCCBicw ggUPoAMCAQICAw3vNzANBgkqhkiG9w0BAQUFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTE1MDUwNTA5NDM0MVoXDTE2MDUwNTA5NTMzNlowQjEcMBoGA1UEAwwTZHdtdzJAaW5mcmFk ZWFkLm9yZzEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMkbm9kPbx1j/X4RVyf/pPKSYwelcco69TvnQQbKM8m8xkWjXJI1 jpJ1jMaGUZGFToINMSZi7lZawUozudWbXSKy1SikENSTJHffsdRAIlsp+hR8vWvjsKUry6sEdqPG 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