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 AAE89C432C0 for ; Sat, 16 Nov 2019 21:58:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8048F206F4 for ; Sat, 16 Nov 2019 21:58:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727691AbfKPV6C (ORCPT ); Sat, 16 Nov 2019 16:58:02 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:51506 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727629AbfKPV6B (ORCPT ); Sat, 16 Nov 2019 16:58:01 -0500 Received: by mail-il1-f199.google.com with SMTP id x2so12392196ilk.18 for ; Sat, 16 Nov 2019 13:58:01 -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=FivOluRux2/DVAkTpjJWtSvpnnKGD4Lb0eJIgMOZqFE=; b=akQ67PVH3NJPaVFRI1SmX/CneB1wMenow4c14tolbaZmcbQtSYwpdiBX5oedaS5CSU /HJ5wepe1dH85i8IPrh8Yrmd1VcvT9Rb0eoA8AAt+Lc46JMl2NT/ObddM1cxyl6oBqmt QC/mBltMUHTds5a9yOK7hsH9d/KXEgAZzqDBH0MgH/XrotZrsguDc89E+LpU8qaZ9tJz PXVEYFTrVHKEXEJhDzftGZL/YAlyna4R6mGq4lsjVsgmMQC6hDtqulaFC3DRUqpv1cc/ yze2/qI2LhWRGPwV8hNFMGvWyBSSI7eonbSFjiRNHI5r7+uWAEG+0fQ3iPxRdDYp9wQ6 0K4w== X-Gm-Message-State: APjAAAVtBeCYFQDmGtu7bieK8Zae95UFl3tMUg66Gu8WbMK/rrD0IeQ3 PpOsTAJzRJ10IIhRIgMNP05UyiOQT9T/ddT0wqHJDk0iE2Vi X-Google-Smtp-Source: APXvYqyBClsLcSrM3dmH+CTnYr4efRlSIxtAlH+yao3jUBN/eeOlTRZsa2EivhAtWsDIyW2jCsP5hnuY0bzWexF2Lwoo7rY/12fX MIME-Version: 1.0 X-Received: by 2002:a92:5fc2:: with SMTP id i63mr7652353ill.218.1573941480648; Sat, 16 Nov 2019 13:58:00 -0800 (PST) Date: Sat, 16 Nov 2019 13:58:00 -0800 In-Reply-To: <000000000000029056057cd141cb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d9f8a805977dce36@google.com> Subject: Re: possible deadlock in neigh_change_state From: syzbot To: christian@brauner.io, corbet@lwn.net, davem@davemloft.net, dsahern@gmail.com, dvyukov@google.com, ebiggers@kernel.org, edumazet@google.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, roopa@cumulusnetworks.com, syzkaller-bugs@googlegroups.com, w.bumiller@proxmox.com 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 58956317c8de52009d1a38a721474c24aef74fe7 Author: David Ahern Date: Fri Dec 7 20:24:57 2018 +0000 neighbor: Improve garbage collection bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1328a1e2e00000 start commit: addb0679 Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: net-next final crash: https://syzkaller.appspot.com/x/report.txt?x=10a8a1e2e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1728a1e2e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d9655b05acfc97ff dashboard link: https://syzkaller.appspot.com/bug?extid=6a3c02010a025ac7b7cf syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13317705400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=177bb01b400000 Reported-by: syzbot+6a3c02010a025ac7b7cf@syzkaller.appspotmail.com Fixes: 58956317c8de ("neighbor: Improve garbage collection") For information about bisection process see: https://goo.gl/tpsmEJ#bisection