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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 1158EC33CAF for ; Sun, 19 Jan 2020 20:21:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D78D0206ED for ; Sun, 19 Jan 2020 20:21:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728894AbgASUVB (ORCPT ); Sun, 19 Jan 2020 15:21:01 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:46597 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727138AbgASUVB (ORCPT ); Sun, 19 Jan 2020 15:21:01 -0500 Received: by mail-io1-f72.google.com with SMTP id p206so18713658iod.13 for ; Sun, 19 Jan 2020 12:21:01 -0800 (PST) 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=tB8tVCfxWFIVfqWEsKuHgi0liSe9R1RZ+UBErAfoDaU=; b=dLR0EHHaS0vjQzHbMeI15xDGCAtzbRu7PDZAw77yfDfDLIJYAqPrBISE3gpc7bTnrZ OXE2Dxy9Ii8esxeIYfROksIwsmAMO8T0Yf3ZMF693HPfezNC7/CnnYsVY/IEgnkyIlfG tq2gop0leeV9hjxDzzsRc0wlKt4y2eJL9LqqGTErhW0dvkStFtzDF6y0sPqpymAc2xUp YTQISiGdw6TdP1Vu0OpCuZf4elOJ8h3g77jsiPfXbVLtxkNL1CcsL07AiIDb9AV2aymu mYyjdJiClXdzXpmmk0m2enkbRDMlwSOtsvd47BQ0g5Zd33TpFve0Ir6xk+/JulCjGPRB P8CA== X-Gm-Message-State: APjAAAXBhdfry/5SjWRvGmrm6Vfe+Fcy4dNoAUXHbC7PEXXaCtqmCX1A cCUQHiFmaJSQNRv5zs8iQ1QTnuxIC2VfzZkZxSlRJnJKjIMt X-Google-Smtp-Source: APXvYqyBW0ANY5otx8x2mkJHYLCBShYafFG9L0jcSxJr3/w8Z3m4XgrA+Nba0kwQlcnkDJsAXjzzdqX7oGV/luxPfoRNInuKbPwk MIME-Version: 1.0 X-Received: by 2002:a6b:b74a:: with SMTP id h71mr15932229iof.212.1579465260652; Sun, 19 Jan 2020 12:21:00 -0800 (PST) Date: Sun, 19 Jan 2020 12:21:00 -0800 In-Reply-To: <0000000000006d7b1e059c7db653@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cbfd34059c83e917@google.com> Subject: Re: KASAN: use-after-free Read in bitmap_ip_ext_cleanup From: syzbot To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, florent.fourcot@wifirst.fr, fw@strlen.de, jeremy@azazel.net, johannes.berg@intel.com, kadlec@netfilter.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, nikolay@cumulusnetworks.com, pablo@netfilter.org, roopa@cumulusnetworks.com, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org syzbot has bisected this bug to: commit 3d26eb8ad1e9b906433903ce05f775cf038e747f Author: Nikolay Aleksandrov Date: Tue Jul 2 12:00:20 2019 +0000 net: bridge: don't cache ether dest pointer on input bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17bb1cc9e00000 start commit: 9aaa2949 Merge branch '1GbE' of git://git.kernel.org/pub/s.. git tree: net-next final crash: https://syzkaller.appspot.com/x/report.txt?x=147b1cc9e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=107b1cc9e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=66d8660c57ff3c98 dashboard link: https://syzkaller.appspot.com/bug?extid=b554d01b6c7870b17da2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15db12a5e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15316faee00000 Reported-by: syzbot+b554d01b6c7870b17da2@syzkaller.appspotmail.com Fixes: 3d26eb8ad1e9 ("net: bridge: don't cache ether dest pointer on input") For information about bisection process see: https://goo.gl/tpsmEJ#bisection