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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 C5A9AC43465 for ; Sat, 19 Sep 2020 14:31:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A354B20771 for ; Sat, 19 Sep 2020 14:31:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726518AbgISObG convert rfc822-to-8bit (ORCPT ); Sat, 19 Sep 2020 10:31:06 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:55240 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726481AbgISObG (ORCPT ); Sat, 19 Sep 2020 10:31:06 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-281-bAjbsE6rN1eTAY15huzJqA-1; Sat, 19 Sep 2020 15:24:11 +0100 X-MC-Unique: bAjbsE6rN1eTAY15huzJqA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Sat, 19 Sep 2020 15:24:10 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Sat, 19 Sep 2020 15:24:10 +0100 From: David Laight To: 'Christoph Hellwig' , Alexander Viro CC: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , "linux-arm-kernel@lists.infradead.org" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-mips@vger.kernel.org" , "linux-parisc@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-s390@vger.kernel.org" , "sparclinux@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-aio@kvack.org" , "io-uring@vger.kernel.org" , "linux-arch@vger.kernel.org" , "linux-mm@kvack.org" , "netdev@vger.kernel.org" , "keyrings@vger.kernel.org" , "linux-security-module@vger.kernel.org" Subject: RE: let import_iovec deal with compat_iovecs as well Thread-Topic: let import_iovec deal with compat_iovecs as well Thread-Index: AQHWjbnKEn35LxofhEeT1lmdzdUiWqlwBNiw Date: Sat, 19 Sep 2020 14:24:10 +0000 Message-ID: <2c7bf42ee4314484ae0177280cd8f5f3@AcuMS.aculab.com> References: <20200918124533.3487701-1-hch@lst.de> In-Reply-To: <20200918124533.3487701-1-hch@lst.de> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Christoph Hellwig > Sent: 18 September 2020 13:45 > > this series changes import_iovec to transparently deal with comat iovec > structures, and then cleanups up a lot of code dupliation. But to get > there it first has to fix the pre-existing bug that io_uring compat > contexts don't trigger the in_compat_syscall() check. This has so far > been relatively harmless as very little code callable from io_uring used > the check, and even that code that could be called usually wasn't. I thought about that change while writing my import_iovec() => iovec_import() patch - and thought that the io_uring code would (as usual) cause grief. Christoph - did you see those patches? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)