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=-8.3 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL autolearn=no 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 3771BCA9ED5 for ; Tue, 5 Nov 2019 08:39:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0782920717 for ; Tue, 5 Nov 2019 08:39:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="LTH5MH7Z" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730528AbfKEIjj (ORCPT ); Tue, 5 Nov 2019 03:39:39 -0500 Received: from mail-qk1-f195.google.com ([209.85.222.195]:39158 "EHLO mail-qk1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725806AbfKEIjj (ORCPT ); Tue, 5 Nov 2019 03:39:39 -0500 Received: by mail-qk1-f195.google.com with SMTP id 15so20397549qkh.6 for ; Tue, 05 Nov 2019 00:39:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=PRYNbG5QNqFG128DjZPqd8sFESURUG3UtspoRmOBrrA=; b=LTH5MH7ZAzm0mUlaa9ZRsoQN6SuoAu77crA2KANEa+TsjOsmVOrZfqU8TmrAweKOtj Pp3rCJ0Zg210f0W7/MZSWOFFlUI6WaEaVxJku//rUB38V8QoX+KFoun5XZfRulSqOhYE 9CGw3TId+2WjPbtcOFIOmpMtD6DaOHg3KsVDrMHWQ8vpDBqSwU6ncFEY96jKEPUcoA5d JSgauFt4wasEaP4niqeVx3gt7ZMEZ/3KMxGOYDE085QR1UwyFc1X+FzsH5Pr9p2AVN4R BcvyMF3Qcq32etyGx4E0APTzVCCD1bVnq4pEv0Loy2njx6i/omS5o0IAvpFiywrWqmyC IhNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=PRYNbG5QNqFG128DjZPqd8sFESURUG3UtspoRmOBrrA=; b=DjmGBJi7zNK+pVmy4UBlFaKg9iSYBuSBlBMsdsKDabupzzjgvRYDLErsaEAP71w3Y2 1TnAL+6ItMgmoXQ2VfEQLL/cHJG80fWbABUEIjrXCAkw2cYXadBnnJG4NmwnikI/9/Em +0j6qO8BWjGsohANr0g0jvKpXQYGlx4Y0rK+IuTV5Rr+c0EFRgARn7TB9bUS8S+LUAV0 lgIhkfTntr6+jdCOAGWn69Mdwj1z36BE1zHUFrPNXKs4o/onBmD9pw2yYD0TPVJ24QCv X1k+eTFRogK81qFOgzxBvKY0s7coedKmLV6h8kanHmT9d0e8YIX/BUTTr2MWgP2ftWJR 9/aw== X-Gm-Message-State: APjAAAXa67y/FsPdeg/o3L4HAyJSiiLqhBPeCr3bISh8ckt4+kYyVMDD L94uyTupwiQapP74CCGaE77Ssf76gnlRL61g0g78OQ== X-Google-Smtp-Source: APXvYqwpbDMvK36UP0DKRl7ceK05YYEpzXcS/e1r4u3yL1kFyGmZSy+oPtbsVNFRkImS/BYLJd4IeXJrI+fFRp6fw2s= X-Received: by 2002:a37:6845:: with SMTP id d66mr11846617qkc.407.1572943177401; Tue, 05 Nov 2019 00:39:37 -0800 (PST) MIME-Version: 1.0 References: <0000000000009393ba059691c6a3@google.com> <0000000000009427b5059694e33c@google.com> <969f940b-05ba-3fbf-79ba-95dc1cebc40d@pengutronix.de> In-Reply-To: <969f940b-05ba-3fbf-79ba-95dc1cebc40d@pengutronix.de> From: Dmitry Vyukov Date: Tue, 5 Nov 2019 09:39:26 +0100 Message-ID: Subject: Re: KASAN: use-after-free Read in j1939_session_get_by_addr To: Marc Kleine-Budde Cc: Jose Abreu , syzbot , "arvid.brodin@alten.se" , "davem@davemloft.net" , "ilias.apalodimas@linaro.org" , "kernel@pengutronix.de" , "linux-can@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux@rempel-privat.de" , "netdev@vger.kernel.org" , "robin@protonic.nl" , "socketcan@hartkopp.net" , "syzkaller-bugs@googlegroups.com" Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Nov 5, 2019 at 9:35 AM Marc Kleine-Budde wrote: > > On 11/5/19 9:21 AM, Jose Abreu wrote: > > From: syzbot > > Date: Nov/05/2019, 08:05:01 (UTC+00:00) > > > >> syzbot has bisected this bug to: > >> > >> commit 2af6106ae949651d529c8c3f0734c3a7babd0d4b > >> Author: Jose Abreu > >> Date: Tue Jul 9 08:03:00 2019 +0000 > >> > >> net: stmmac: Introducing support for Page Pool > > > > From the config provided, stmmac driver is not even enabled. Can you > > please confirm the bisection process ? > > Looks like a false positive, as j1939 (net/can/j1939/) hit mainline with > v5.4-rc1~131^2~78^2. > > While the bisected commit is v5.3-rc1~140^2~13^2. Yes, the commit is most likely irrelevant. As you can see in the bisection log the process was diverged by "WARNING: ODEBUG bug in netdev_freemem". I think it's not the first and not the second time I see that crash breaks bisection: https://syzkaller.appspot.com/bug?id=96a64fde216dca408a5c25db4e57838c51e435aa