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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 05318C388F3 for ; Mon, 30 Sep 2019 10:53:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4EDE21855 for ; Mon, 30 Sep 2019 10:53:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730836AbfI3KxC (ORCPT ); Mon, 30 Sep 2019 06:53:02 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:40828 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727025AbfI3KxB (ORCPT ); Mon, 30 Sep 2019 06:53:01 -0400 Received: by mail-io1-f71.google.com with SMTP id r20so29413884ioh.7 for ; Mon, 30 Sep 2019 03:53:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=hI5UiabcxF02JCdIXhKz7T8NGcvRDQ9zry7wX/9b2Wg=; b=GqmYTNm+KUbAc+Haz4akMyD6rWgJ5TusNYrAFLAGIlycWZtJM699e/JHaX4CcjABuM FXfTD7egBg0xcymX4IEFnk9pyOjMMWwk79uc7WS+w3E1ZJtJrNbvWHQFO42AZgUIq18S DYCh1HtEW7GzUgh92jwlKvn+J3pdTeQJRxsJn1l5MVBY2y44HrrNASYyIG/cK/IOyToI nyklXNkEIOOcQi4WCu446nNnzkUliUMeTPOkysgDXGhrAwfzEfHFSr2jzuETIrMctO1P +6wQvFgehGAzPNs6pEghFCf6ZyJZ+Jr7anXuoet9R6U7Vs4O8HvWqae1wfYUpCziJMGh 0MVw== X-Gm-Message-State: APjAAAXQgs62wysNcFdATxAjK66RBlPFbZu89l8r8vr6VT7VPSPFPo+F 670WjtfW91EdNbsZIenAS+bdfJFXCZgHIuNhIjy6G+FBziwP X-Google-Smtp-Source: APXvYqxRYokbmnvyKs8m43W2eYhxiwwUbwWy13gugzMDjSun9tKIic+MOKtsA0/QDSj4eyEqMzAj3mnJOFEjdYOCIauwyEoJD8+B MIME-Version: 1.0 X-Received: by 2002:a92:c0d2:: with SMTP id t18mr20022479ilf.239.1569840781088; Mon, 30 Sep 2019 03:53:01 -0700 (PDT) Date: Mon, 30 Sep 2019 03:53:01 -0700 In-Reply-To: <00000000000084fb070593bff0fb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001c5e810593c30a8c@google.com> Subject: Re: BUG: unable to handle kernel NULL pointer dereference in xsk_poll From: syzbot To: ast@kernel.org, bjorn.topel@intel.com, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, hawk@kernel.org, jakub.kicinski@netronome.com, john.fastabend@gmail.com, jonathan.lemon@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, magnus.karlsson@gmail.com, magnus.karlsson@intel.com, maximmi@mellanox.com, netdev@vger.kernel.org, saeedm@mellanox.com, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, tariqt@mellanox.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit 77cd0d7b3f257fd0e3096b4fdcff1a7d38e99e10 Author: Magnus Karlsson Date: Wed Aug 14 07:27:17 2019 +0000 xsk: add support for need_wakeup flag in AF_XDP rings bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17848acd600000 start commit: a3c0e7b1 Merge tag 'libnvdimm-fixes-5.4-rc1' of git://git... git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=14448acd600000 console output: https://syzkaller.appspot.com/x/log.txt?x=10448acd600000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ffbfa7e4a36190f dashboard link: https://syzkaller.appspot.com/bug?extid=a5765ed8cdb1cca4d249 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1096d835600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129f15f3600000 Reported-by: syzbot+a5765ed8cdb1cca4d249@syzkaller.appspotmail.com Fixes: 77cd0d7b3f25 ("xsk: add support for need_wakeup flag in AF_XDP rings") For information about bisection process see: https://goo.gl/tpsmEJ#bisection