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 8458DC433EF for ; Thu, 24 Mar 2022 08:10:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348775AbiCXILt (ORCPT ); Thu, 24 Mar 2022 04:11:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239836AbiCXILq (ORCPT ); Thu, 24 Mar 2022 04:11:46 -0400 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 85A9B55BDB for ; Thu, 24 Mar 2022 01:10:15 -0700 (PDT) Received: by mail-io1-f72.google.com with SMTP id x16-20020a6bfe10000000b006409f03e39eso2655954ioh.7 for ; Thu, 24 Mar 2022 01:10:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=t+jbwm74WRfF5Vzd3FgH+0bxmCGjbH06Iytwh85LND0=; b=Y8B9SSHB+/BQWXDiCx9M8Mst6WOzfCUShwgeEaXFmB12154r1d2SPuyKhYUPTgX/Sd GSU1CFkhhrDyl/IRurolNWlNkRkyL3NzczLnZUvMwca+62VwB7aFtcV64SSw78IHBys5 qyhDHHfT+i5w3av6YlHBhi85ci1eqI1VgQ5fGwKVHVqV3xpXFnmEpn5idMwvZ2lLKvim sNGHLtiDsNIxXPRy+6t+1e7vfoGX1v6CeTEad1ruwd8alBJeAtIaTV3XX+beP1sy3sNe iEgq0Ez95dIxVIoZMqdCMRXRN2PThjofO6DRSD4ZHZyH4WatjyCki/YzigwOoE7VsNVc dShg== X-Gm-Message-State: AOAM532W4qigriKQnXan7ZM1iPJczY5a55s2UNj81jpK5dvYMYLfr6x6 TTWyXGxoQuO3sDxunfdYX+N3HaphNog1DhBoODV5VlfTYVN1 X-Google-Smtp-Source: ABdhPJyewI41637tag9ZsdIiPUiLSCN1R04hKibsAvdjzY7pq62g5U8s4PEmwEA7W0dpXwluG2x0yCZviUScU4ZAte2D/dJNwK6b MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d03:b0:2c7:e33f:2557 with SMTP id i3-20020a056e021d0300b002c7e33f2557mr2273855ila.15.1648109414852; Thu, 24 Mar 2022 01:10:14 -0700 (PDT) Date: Thu, 24 Mar 2022 01:10:14 -0700 In-Reply-To: <000000000000acf1e405daebb7c7@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000392f6005daf26000@google.com> Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in __tcp_transmit_skb From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, john.fastabend@gmail.com, kafai@fb.com, kgraul@linux.ibm.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com, yoshfuji@linux-ipv6.org 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 f2f2325ec79970807012dfc9e716cdbb02d9b574 Author: Eric Dumazet Date: Fri Feb 4 20:15:46 2022 +0000 ip6mr: ip6mr_sk_done() can exit early in common cases bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16299d7b700000 start commit: 36c2e31ad25b net: geneve: add missing netlink policy and s.. git tree: net-next final oops: https://syzkaller.appspot.com/x/report.txt?x=15299d7b700000 console output: https://syzkaller.appspot.com/x/log.txt?x=11299d7b700000 kernel config: https://syzkaller.appspot.com/x/.config?x=4a15e2288cf165c9 dashboard link: https://syzkaller.appspot.com/bug?extid=090d23ddbd5cd185c2e0 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=171eadbd700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12cacda3700000 Reported-by: syzbot+090d23ddbd5cd185c2e0@syzkaller.appspotmail.com Fixes: f2f2325ec799 ("ip6mr: ip6mr_sk_done() can exit early in common cases") For information about bisection process see: https://goo.gl/tpsmEJ#bisection