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 E13C9C43334 for ; Fri, 22 Jul 2022 04:24:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229739AbiGVEYD (ORCPT ); Fri, 22 Jul 2022 00:24:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbiGVEYC (ORCPT ); Fri, 22 Jul 2022 00:24:02 -0400 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 83E1397A1A for ; Thu, 21 Jul 2022 21:24:01 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id y9so3495299pff.12 for ; Thu, 21 Jul 2022 21:24:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ee4+yiq2wuTRWAWDhT2tmaPwcxtERkJb7KZRNYmv3OY=; b=q3kkFJzzksE1bItcprBQU2tuqOyyiu3EIlsaKu5Nn8xKhNI2zVBUnMd4Sh4Wrf5Zuv jNWf3XbpwaDaoKhFnYruYFmyb4L3dhopepVtmf8gr9LMIYS+chjru7tniG3N+7LHUf1c 0j14G/HFpdCDv22dZrdESTpeAtdNyq2qKu73qHg869yo9vRe/ryV6NCF1oyx2MX4MVI5 0iOj1mEeB/4/Xucn+sQ9Hbq+XXXjgAkp/PMOSgh+gItL7sR56Vfv3gRE+PtEYT82u3ZP wIYJLJa+KYxKIaMvse5Jx5xuVy50Qd09RjWcm820j6cCYxrpDUPjtbamF4S75qBrnzGn dbPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ee4+yiq2wuTRWAWDhT2tmaPwcxtERkJb7KZRNYmv3OY=; b=6QbjOty2s/YMBEsn3YUgy9OLnwemr7kAR5uCzcaKr+U9yqmglv9UP0ABS8RM37cpQw o9SbTUOXYvrXGAEqgzvH7x92tdIqY23SDCJff6XLYGMgZbG7slvCDAsS+YSvaiAQmmE8 iOUuHQZYYzmxeiphqQY4MqbfTJbP4rSg5W8qtlwKbZz0J/ae9+FjQYwmu/q9MtFlPm2Z fsXzp+u72ouKiakyZ83dDdHCziVhHUHNl+mHKDyo+39UIQiIvlIiWuc0oiCs/poTa3/v e+nhEpzDeutH+mqAkSbj8DS7SeBhKnsteNdCX8WdVB4aIhit1da/INGF33PWWKRlldrR Jthw== X-Gm-Message-State: AJIora9VB1PslWJpC4rbrMqmNtx1dMIO3QvkDzMgM6f73+W8uyZZ87+N +yuZlYsGQSVI7UwbAhl5eBY= X-Google-Smtp-Source: AGRyM1unOT9RK5jGUrzDbMxNgdi/RYtbf3S/Gx/cXHm56N4oU7KHkUnuJ3vmxGXamK/7Xwhe4wR7gQ== X-Received: by 2002:a63:7e4c:0:b0:412:f7e:9ab6 with SMTP id o12-20020a637e4c000000b004120f7e9ab6mr1500148pgn.494.1658463841013; Thu, 21 Jul 2022 21:24:01 -0700 (PDT) Received: from Laptop-X1 ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id bi5-20020a170902bf0500b0016bfea13321sm2498143plb.243.2022.07.21.21.23.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Jul 2022 21:24:00 -0700 (PDT) Date: Fri, 22 Jul 2022 12:23:54 +0800 From: Hangbin Liu To: Taehee Yoo Cc: Eric Dumazet , David Miller , Jakub Kicinski , Paolo Abeni , Hideaki YOSHIFUJI , David Ahern , netdev Subject: Re: [PATCH net] net: mld: do not use system_wq in the mld Message-ID: References: <20220721120316.17070-1-ap420073@gmail.com> <6b4db767-3fbd-66df-79c4-f0d78b27b9ee@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Fri, Jul 22, 2022 at 10:35:52AM +0800, Hangbin Liu wrote: > > I found this bug while testing another syzbot report. > > (https://syzkaller.appspot.com/bug?id=ed41eaa4367b421d37aab5dee25e3f4c91ceae93) > > And I can't find the same case in the syzbot reports list. > > > > I just use some command lines and many kernel debug options such as > > kmemleak, kasan, lockdep, and others. > > > > Hi Taehee, > > I got a similar issue with yours after Eric's 2d3916f31891 > ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()"). > I use force_mld_version=1 and adding a lot of IPv6 address to generate the > mld reports flood. Here is my reproducer: BTW, thanks for your fix. With your patch the issue is fixed. Please feel free to add Tested-by: Hangbin Liu Cheers Hangbin