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 9D0B3C433F5 for ; Tue, 17 May 2022 18:46:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352352AbiEQSqr (ORCPT ); Tue, 17 May 2022 14:46:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242864AbiEQSqn (ORCPT ); Tue, 17 May 2022 14:46:43 -0400 Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12EA1387B1 for ; Tue, 17 May 2022 11:46:43 -0700 (PDT) Received: by mail-io1-xd32.google.com with SMTP id f4so20249235iov.2 for ; Tue, 17 May 2022 11:46:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:from:in-reply-to:content-transfer-encoding; bh=YIMbxTsLbrtbEFkaDSucwQrnGbAU6ETE/HBk7HXw4BM=; b=ASYaeDqOr6ZY8Y43feyxwUMnrIDRCO57Y0tCwbWFl1fPRaCrgk/PQQRdq2efcvraln /X+FbfFi9Q7SGYrJGRc0XaOjGtseOysVsi+cTdhgdSw1qncp9S3OgZB5D6DbqMyiJ5hN 86YVYr8OEX0vDEhnAx/TE5NQmgBAFAwiHUMFkJ37NIGbDJ70ANJQWV1RjiSHL8rUc81z x3WLf6UbNTuBElaOYFc4+qMVk9N8FDx13MuSQJ2yk4WG7UtrEW81OFX7nRoxlOooDEUk Q0b5EjP7m4bBifoBEtc0mcnsvU18uL2OjPW/kEmoXC36Mo2Clp5Bl/Gr/WczDz9LUWtq GmOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:in-reply-to :content-transfer-encoding; bh=YIMbxTsLbrtbEFkaDSucwQrnGbAU6ETE/HBk7HXw4BM=; b=cu6aaaKP19iZ/ebgOsKCNMyV8GgcaRgxwbKTiMQbJnvjlj5E/1RFcG9He9PC9/mZdl aOA57qY0fag1KQ3rb/MOroHHM+pDyeJ1y8YAVWdT4+QaQC8OmNz6jMrc+HISFyo6UA8g SWXHyB04dUXJgFZfkviiv0IsMX1lJcbr0u08e45TliBCvcJp1G4hxpC6Rrh5kmheKZmX UPI6W7wSzBndfr+cd9TBt6v2Dsv1jDNdkChXpG/1yQKBE2ig9RbOPDvFTczqQeN/jomW DUCMUT+3h0dOE5tRHYY9SLQOInIgjPitf6EHUdRwVgHIayQUhAh3BM6RNIx9o4FW1Zfx a6Dg== X-Gm-Message-State: AOAM533M/JbzKXVxOUof4nxcEPMP7RMts2M6bET/2Fpl45M0S3nx1Fq5 kacPDwI5iV0W3G2pOZZNlhPi0A== X-Google-Smtp-Source: ABdhPJwhs6oUxOuuvG3hk5YOfiQ6EgXRITTlIrL7zUmPYKqYM4mtvC+cg2zwyv9nGK+ZbzyvqCoyFg== X-Received: by 2002:a05:6602:1510:b0:65a:edd4:cdb4 with SMTP id g16-20020a056602151000b0065aedd4cdb4mr10853963iow.143.1652813202389; Tue, 17 May 2022 11:46:42 -0700 (PDT) Received: from [192.168.1.172] ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id o13-20020a056638124d00b0032e30453802sm1804804jas.47.2022.05.17.11.46.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 May 2022 11:46:41 -0700 (PDT) Message-ID: Date: Tue, 17 May 2022 12:46:40 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in io_do_iopoll Content-Language: en-US To: syzbot , asml.silence@gmail.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000c1bd6505df39865e@google.com> From: Jens Axboe In-Reply-To: <000000000000c1bd6505df39865e@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/17/22 12:44 PM, syzbot wrote: > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > BUG: unable to handle kernel NULL pointer dereference in io_do_iopoll Gah, backport ended up putting the hunk in the wrong spot, not very useful. #syz test git://git.kernel.dk/linux-block io_uring-5.18 -- Jens Axboe