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,URIBL_BLOCKED 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 49957C432C0 for ; Sun, 24 Nov 2019 23:05:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 25A1D2075E for ; Sun, 24 Nov 2019 23:05:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727109AbfKXXFC (ORCPT ); Sun, 24 Nov 2019 18:05:02 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:57066 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726942AbfKXXFC (ORCPT ); Sun, 24 Nov 2019 18:05:02 -0500 Received: by mail-il1-f200.google.com with SMTP id e5so12094114ile.23 for ; Sun, 24 Nov 2019 15:05:01 -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=9mvzd7fUp8HPwHRxMhxwkoAC5BApeXYD4JfBSm6Tu7E=; b=Xp+6AJ6fq5IvMPa5hPKFroNCL+ff9LoHYvVA0D3DNZQay5Kv9sOQwTPeyJqOT8M/og tSch7EJrAuJejeGd9xKlKPsp9fp5YNpmLmDfpmg4X5uWpEla/v6dXJ8W6h9SKoSJS0QN gqzOVu0UXjFgV5zra1e5r4jPIcmiW4ribtRGzCmRyqi+mYJhnDaqCy8AKrj02QgZ1CB0 SWf7cZKEHkONKFouLZxwnhkOaR+uHCNk0tDNehtzJqCDCwYe9uzVgWAQbGbAS7+ziHv7 TJXpCA3euKtPTHTOYNuDdZLcLEBFuKSyDfCynaiuPC9LVmIu90r0cqXt3hAwUq3ckfTc sm9Q== X-Gm-Message-State: APjAAAWE/mpy7tZy3zZG8vMcv226p/hUM8NLBtNxOvvo6swphBx5MmFz YNS9/PblhDaRd0b2Ndno5Cy5YKdXEXOPh0hbQhj0dWJ9PJze X-Google-Smtp-Source: APXvYqxYdNfz5GYWLNzmDfSQ+/s3z/yI52/HmVxwGcXxgu/73KYY+2OwEOZgsW534ki9gWV9TGl9Da+9VLUkYzNmNkZJKEOy5QEO MIME-Version: 1.0 X-Received: by 2002:a92:45cb:: with SMTP id z72mr16071673ilj.101.1574636701349; Sun, 24 Nov 2019 15:05:01 -0800 (PST) Date: Sun, 24 Nov 2019 15:05:01 -0800 In-Reply-To: <0000000000002b532a056ebcb3eb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003c0b2105981fad65@google.com> Subject: Re: WARNING: suspicious RCU usage in pid_task From: syzbot To: akpm@linux-foundation.org, ast@kernel.org, davem@davemloft.net, dhowells@redhat.com, dsahern@gmail.com, dvyukov@google.com, ebiederm@xmission.com, gs051095@gmail.com, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, oleg@redhat.com, pasha.tatashin@oracle.com, riel@redhat.com, rppt@linux.vnet.ibm.com, syzkaller-bugs@googlegroups.com, wangkefeng.wang@huawei.com, weiyongjun1@huawei.com, yoshfuji@linux-ipv6.org 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 23fb93a4d3f118a900790066d03368a296dce0d6 Author: David Ahern Date: Wed Apr 18 00:33:23 2018 +0000 net/ipv6: Cleanup exception and cache route handling bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1295147ae00000 start commit: 6f0d349d Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=1195147ae00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1695147ae00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a63be0c83e84d370 dashboard link: https://syzkaller.appspot.com/bug?extid=c2d4c3ae3fd90bbaf059 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14f0a814400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ce574c400000 Reported-by: syzbot+c2d4c3ae3fd90bbaf059@syzkaller.appspotmail.com Fixes: 23fb93a4d3f1 ("net/ipv6: Cleanup exception and cache route handling") For information about bisection process see: https://goo.gl/tpsmEJ#bisection