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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C79A2C433EF for ; Thu, 14 Oct 2021 13:50:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA5986101E for ; Thu, 14 Oct 2021 13:50:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231705AbhJNNwL (ORCPT ); Thu, 14 Oct 2021 09:52:11 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:57969 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231365AbhJNNwK (ORCPT ); Thu, 14 Oct 2021 09:52:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634219405; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NU91yXOcSHE5nSjfMfHje2UOd8qpOzLy0LtZp6G93T4=; b=AB7UPs+rwgz2HBsB7WXnX64N2G94HOQEFlbiv2xdh0pSneXqstNHEJYHssiJUkKnCVOo/6 SMjvvX90RDakNCd1GX1lgIuVf82iQH9kzs5WTYSvrQOgEBuD6O0TsYenKSZHMY6i/mwfPj TK+4DCysQGNTK9voqG+VzKLuDJMYOXY= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-594-EjE6mZnFNPqeTq_QjYtjQQ-1; Thu, 14 Oct 2021 09:50:03 -0400 X-MC-Unique: EjE6mZnFNPqeTq_QjYtjQQ-1 Received: by mail-wr1-f72.google.com with SMTP id r21-20020adfa155000000b001608162e16dso4579387wrr.15 for ; Thu, 14 Oct 2021 06:50:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=NU91yXOcSHE5nSjfMfHje2UOd8qpOzLy0LtZp6G93T4=; b=wJS6/uzIaNwJYA+NhCaBEUyIYcVdettPVk1yPabilasqGymZT+D3DAALqJRuM6N2Y5 yV3lN5OxZtAoP8GxSAlaNRnRniTHMz5+yFWJFcnfaNZ2epVEpRAlU85puK1NPL5QHGpJ BDRkJgU0iHOUKFGM0+v9gXoLRanNaaoTf68bnhIGTy3TDYPqHVGVS/boS8q6MwnAN1Nn vXDogTcFVhJ//lRihn9uhmJgDawsqJske7ZO/Vg4wFxad3NzuWhvif06EW9Zbb74KN6Y eHZYy9TtZzF3jvtyzhhVp4eMxh5cpE2f4TcDc6sjwS6NIhsiWcCC4CjuDXa3Jnvk0M2c bACA== X-Gm-Message-State: AOAM53188+PL92NvVpCqI0Za40Wg15Cu1ElpMnhdX3CAa5e6+2kctWRm gys/JwT9Yw/7X2N9lFaHfgkEwQbBuSuTHcLX4IuVm2CkYSoHv9DwdSUUNBrM/yDSindlD+4RrXQ TwNlbhwPsyyedzjfA5EHvfkGF X-Received: by 2002:adf:a48c:: with SMTP id g12mr6772220wrb.341.1634219402592; Thu, 14 Oct 2021 06:50:02 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwhasqnkH6VqbFgdvBD0W5Dr+k4Bevu249dEYV/bhzX6RKl2KWbGOdZbqz1wCI3B6WA3SqVvQ== X-Received: by 2002:adf:a48c:: with SMTP id g12mr6772182wrb.341.1634219402382; Thu, 14 Oct 2021 06:50:02 -0700 (PDT) Received: from gerbillo.redhat.com (146-241-231-16.dyn.eolo.it. [146.241.231.16]) by smtp.gmail.com with ESMTPSA id c15sm2496966wrs.19.2021.10.14.06.50.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Oct 2021 06:50:02 -0700 (PDT) Message-ID: Subject: Re: [syzbot] BUG: corrupted list in netif_napi_add From: Paolo Abeni To: Daniel Borkmann , syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Cc: toke@toke.dk, joamaki@gmail.com Date: Thu, 14 Oct 2021 15:50:00 +0200 In-Reply-To: References: <0000000000005639cd05ce3a6d4d@google.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5 (3.36.5-2.fc32) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2021-10-13 at 15:35 +0200, Daniel Borkmann wrote: > On 10/13/21 1:40 PM, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > [ +Paolo/Toke wrt veth/XDP, +Jussi wrt bond/XDP, please take a look, thanks! ] For the records: Toke and me are actively investigating this issue and the other recent related one. So far we could not find anything relevant. The onluy note is that the reproducer is not extremelly reliable - I could not reproduce locally, and multiple syzbot runs on the same code give different results. Anyhow, so far the issue was only observerable on a specific 'next' commit which is currently "not reachable" from any branch. I'm wondering if the issue was caused by some incosistent status of such tree. Cheers, Paolo