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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CE32C7EE2F for ; Thu, 2 Mar 2023 17:53:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229620AbjCBRxF (ORCPT ); Thu, 2 Mar 2023 12:53:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229449AbjCBRxE (ORCPT ); Thu, 2 Mar 2023 12:53:04 -0500 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [IPv6:2a03:a000:7:0:5054:ff:fe1c:15ff]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 255121025E; Thu, 2 Mar 2023 09:53:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=eRFRdAKKCkKrFRZsWy9LuC4DBvxNzT1igB0iYkh4qY4=; b=AsxazJlL5aMQdzq3bALtZj3jJ+ grMORkVYB42eeVlp4YA1Kto/yHPLWIMQFH6C69Gr+C5zWV82lx62Huwx5qdfEFTgpOcmaTKblLlVV 1Ct7dLdAqEsHn/Q/NDw/LTxj0b9JjhT1Q2RmX6KBpjfrsqkAh6i5RvCz1FJraQgqNIFfVCfqHWo9O dM/77yDiF9xxQjEoDrvf3qmQRtFVfrYP4AWLm5zAO1lVjwm1MEDUnTqZzHMWAeIWg3fU4F7G7v8JL Is/VjpPNtHM8ITqX5kg4yhwS31jVbuPByaOxXgz4D0aySHqAF1mdIM7Xgyvi/d3ICRBj9catIJmJ1 jDVTVhHQ==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.96 #2 (Red Hat Linux)) id 1pXn6y-00DMnY-2S; Thu, 02 Mar 2023 17:53:00 +0000 Date: Thu, 2 Mar 2023 17:53:00 +0000 From: Al Viro To: Helge Deller Cc: linux-arch@vger.kernel.org, linux-parisc@vger.kernel.org, Linus Torvalds Subject: Re: [PATCH 08/10] parisc: fix livelock in uaccess Message-ID: References: <84b1c2e4-c096-ed19-9701-472b54a4890c@gmx.de> <39436c4d-f5a2-edd5-24ba-19e4812ea364@gmx.de> <215b226f-7ffd-70d8-4e7b-85b37f288062@gmx.de> <2646c13f-33b8-1047-7cfe-bf7e394344b6@gmx.de> <11cfe564-a620-4d0b-210f-c0525c16a236@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <11cfe564-a620-4d0b-210f-c0525c16a236@gmx.de> Sender: Al Viro Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Wed, Mar 01, 2023 at 05:00:11AM +0100, Helge Deller wrote: > On 2/28/23 23:57, Al Viro wrote: > > On Tue, Feb 28, 2023 at 09:22:31PM +0100, Helge Deller wrote: > > > > > Now I can confirm (with the adjusted reproducer), that your patch > > > allows to kill the process with SIGKILL, while without your patch > > > it's not possibe to kill the process at all. > > > I've tested with a 32- and 64-bit parisc kernel. > > > > > > You may add > > > Tested-by: Helge Deller # parisc > > > to the patch. > > > > > > If you want me to take the patch (with the warning regarding missing msg variable fixed) > > > through the parisc tree, please let me know. > > > > What message do you prefer there? It matters only for the case when > > we are hitting an oops there, but... > > I have no preference on that message. Maybe "Page fault: fault signal on kernel memory" > is too generic, so I'm fine with any better idea/wording you come up with. Ended up going with that... Series reordered and pushed out in #fixes. Status: m68k, riscv, hexagon, parisc: tested by arch maintainers alpha, sparc: locally tested (both sparc32 and sparc64 parts) ia64, microblaze, nios2, openrisc: builds, but I have no way to test the resulting kernels (itanic box appears to be pining for fjords and I've no emulator setup for that, the other three I don't even have userland to test with).