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 04B29C38159 for ; Wed, 18 Jan 2023 13:43:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230291AbjARNnI (ORCPT ); Wed, 18 Jan 2023 08:43:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230293AbjARNmZ (ORCPT ); Wed, 18 Jan 2023 08:42:25 -0500 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2BEC6794D for ; Wed, 18 Jan 2023 05:11:23 -0800 (PST) Received: by mail-il1-f197.google.com with SMTP id y11-20020a056e02178b00b0030c048d64a7so24996524ilu.1 for ; Wed, 18 Jan 2023 05:11:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Gb9ye5L384z0sJ9lHOgovYJTtmnNnzRSfStsIP9mHp4=; b=2md0pQZiGXxq6h9S+0UQLbvoZhmkbSaRmAGwky7cYtacunuzJg12wFhB7mhANs1K8K aZQWBPbBxqkApfyB5L25PVhdcM6FYHfD9rv9TTjGq54sQAbXvlJTBGnOvPWJEccQa7G9 uQ7+lp5nsBu0HPtuGI3NiGFBR+k+d9PzUOB6DGTzQKiSy/xAXCay1poAe3oS8jRJUYjW X9ROoCQTUim3gdwQ4Fwk4S2s6MuKK8X9EX0++h/ZyXV/ZwfY9MRPoOyG+luMA4Uryhav 3KwYROd/hEaJJSosd9O11ryCiW2ZBAqZT8nB2Y6h0cr0qXYRhGmuhLYFiJ6aSGZYy3vH oruQ== X-Gm-Message-State: AFqh2kqvsBCFLCGlrrn5V/fZxE/EuyOJaT1HkW5SrNx7dFfTHur2lBt4 vTvKknm9cvGsJ1JFhbjGY6rjs2os3dcjhYoRoiFS8l+gEIqf X-Google-Smtp-Source: AMrXdXuzeXKW4OevNrY1rNZ/gojCg/BXjtv/ERGhG5fJgGg1aitQlfltHaryjNoMWEuTb+ALgiV6PMylnyGQSAMulP7Z+slvC5Qd MIME-Version: 1.0 X-Received: by 2002:a02:c643:0:b0:38a:c2a7:369d with SMTP id k3-20020a02c643000000b0038ac2a7369dmr633850jan.245.1674047483287; Wed, 18 Jan 2023 05:11:23 -0800 (PST) Date: Wed, 18 Jan 2023 05:11:23 -0800 In-Reply-To: <000000000000fbb2d505f27398cb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000941ee205f2898d65@google.com> Subject: Re: [syzbot] possible deadlock in release_sock From: syzbot To: cong.wang@bytedance.com, davem@davemloft.net, edumazet@google.com, eric.dumazet@gmail.com, gnault@redhat.com, jakub@cloudflare.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 0b2c59720e65885a394a017d0cf9cab118914682 Author: Cong Wang Date: Sat Jan 14 03:01:37 2023 +0000 l2tp: close all race conditions in l2tp_tunnel_register() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15331c61480000 start commit: 87b93b678e95 octeontx2-pf: Avoid use of GFP_KERNEL in atom.. git tree: net final oops: https://syzkaller.appspot.com/x/report.txt?x=17331c61480000 console output: https://syzkaller.appspot.com/x/log.txt?x=13331c61480000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b6ecad960fc703e dashboard link: https://syzkaller.appspot.com/bug?extid=bbd35b345c7cab0d9a08 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1716b3a1480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14e57a91480000 Reported-by: syzbot+bbd35b345c7cab0d9a08@syzkaller.appspotmail.com Fixes: 0b2c59720e65 ("l2tp: close all race conditions in l2tp_tunnel_register()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection