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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS 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 0A204C43381 for ; Mon, 11 Mar 2019 16:20:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE1F92084F for ; Mon, 11 Mar 2019 16:20:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="T4n27hZI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727667AbfCKQUl (ORCPT ); Mon, 11 Mar 2019 12:20:41 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:44877 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726641AbfCKQUl (ORCPT ); Mon, 11 Mar 2019 12:20:41 -0400 Received: by mail-pf1-f194.google.com with SMTP id a3so4041132pff.11 for ; Mon, 11 Mar 2019 09:20:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding:content-language; bh=GUbJ6a4YWCnXI1lu5AXSGN1EPdoNE69oEyeV4fxW80E=; b=T4n27hZI8Gc7IBx5Mm0mxyj3Sfx3Iy+C87ezvMsTiFPDR2Qkse2Kx5SIXcMWMi59T4 sIy78OTumY11BaAlMFX4PS9XPc61vFBKKK7UOEaeSzRvNrH9Mjyolg9KSLtsAd3T/3df pi3WqQw1BvM+2Up7DIJQwQA7mJyGL6uulRAA0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=GUbJ6a4YWCnXI1lu5AXSGN1EPdoNE69oEyeV4fxW80E=; b=em5WhpZzxgCwHHWfoxLYIC8CLVkEKOrhs3kDlC/s6AjDq8fq/ucxbC4SJqot1sEigI yJx5iVr5gGlklqg/9ffoFPjSBhxCF4OuzLNaH7WTAL0fGRQ3UIqyWw3C3EW6rNJ3UToY yDhXOdSooadAyDMYwLHZCcKuP39nkUOwwYdKC5c7KNoKYfOTyEe9Ug5R0dyWd9ucI6Ex o7N8J37lPYud+ezsVB4ipI6NTB4U6B/6ExuYOll99GhPJ2eaoUb/FHMIx7Baim8BPa5Z GU7CBIz2N8KsCkxL1O9QzTtOPCkap58xujJxtdM71bEIiAYaEFzEh5Ucnxkr+CFLHAQj NZjw== X-Gm-Message-State: APjAAAUZoix0dDvIc8r5eUXo9rim1/xcsoL0GTsxFxsz3gjuXNuSrOPo lVPUaHlzkxS5IE99+J7YiIsI2g== X-Google-Smtp-Source: APXvYqy44AsYYWqyxSJ038OsOcxaJ/+q/wJad4B4APzO6+Hifrv1Hhoa4iIOcoubmuWXf0RqjkvQ+Q== X-Received: by 2002:a17:902:4c08:: with SMTP id a8mr35036621ple.294.1552321239946; Mon, 11 Mar 2019 09:20:39 -0700 (PDT) Received: from [10.69.37.149] ([192.19.223.250]) by smtp.gmail.com with ESMTPSA id b15sm13519306pfj.167.2019.03.11.09.20.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Mar 2019 09:20:38 -0700 (PDT) Subject: Re: general protection fault in skb_put To: syzbot , axboe@fb.com, hch@lst.de, johan.hedberg@gmail.com, jsmart2021@gmail.com, keith.busch@intel.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, marcel@holtmann.org, sagi@grimberg.me, syzkaller-bugs@googlegroups.com References: <000000000000032b7f0583d16e0e@google.com> From: James Smart Message-ID: Date: Mon, 11 Mar 2019 09:20:32 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.3 MIME-Version: 1.0 In-Reply-To: <000000000000032b7f0583d16e0e@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org On 3/11/2019 6:20 AM, syzbot wrote: > syzbot has bisected this bug to: > > commit 97faec531460c949d7120672b8c77e2f41f8d6d7 > Author: James Smart > Date:   Thu Sep 13 23:17:38 2018 +0000 > >     nvme_fc: add 'nvme_discovery' sysfs attribute to fc transport device > > bisection log: > https://syzkaller.appspot.com/x/bisect.txt?x=121f55db200000 > start commit:   97faec53 nvme_fc: add 'nvme_discovery' sysfs attribute > to .. > git tree:       linux-next > final crash: https://syzkaller.appspot.com/x/report.txt?x=111f55db200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=161f55db200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=59aefae07c771af6 > dashboard link: > https://syzkaller.appspot.com/bug?extid=65788f9af9d54844389e > userspace arch: amd64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=178e0798c00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b4f0b0c00000 > > Reported-by: syzbot+65788f9af9d54844389e@syzkaller.appspotmail.com > Fixes: 97faec53 ("nvme_fc: add 'nvme_discovery' sysfs attribute to fc > transport device") can someone contact me as to what this thing is doing and how to interpret all the logs.  nvme_fc isn't remotely in any of the logs and doesn't use skb's unless the underlying udev_uevents are using them. -- james