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 291D8C433F5 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 07A9B61029 for ; Thu, 14 Oct 2021 13:50:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231388AbhJNNwK (ORCPT ); Thu, 14 Oct 2021 09:52:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:57651 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230177AbhJNNwK (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=1634219404; 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=F8Dbu/21BN00ZPh984YQUEr2XsD4uo/QXGsy1JqsNCGlNy/yrpaAkm5471tOr6IPOhF4kH 34SJXQUZu6QOGcfMrSHsNFycVlyq0GL73pBcSM/TXikHHJ4+5TosCPzKgzcy5MGUAOjw33 9pjhx4WHVvB+LnY7mW6zCPMG6v/S2Vw= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-75-jgtChhiZONyQHarOlyWR6g-1; Thu, 14 Oct 2021 09:50:03 -0400 X-MC-Unique: jgtChhiZONyQHarOlyWR6g-1 Received: by mail-wr1-f70.google.com with SMTP id h99-20020adf906c000000b001644add8925so1432634wrh.0 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=G/sLSlGl/WaYX5PlhDBMhHItR04O0Q04WyBYcMP7I3HLfuHcYKJ8dvCPFCpIuEcrDB gs1aehTJW3L986EF9BKzXaAarnNlz/Ju8m+29zsjjtu5kh27s50s2SLgXtw8gmAgIXGG gU7fCxG/QemExt+Vn69O4WGNnbFgNSEbllPzoqg/K0BgYD7F8Q2or7C9Zwi35uVXt6i0 2JPd8WQAezui3qBJKGflmsV6VFuSmgNrfEKCyhrFszwx0zKp961/8mtWxAQaGPopHwyA aI0E5Xxqykj55rT+9wZ2QBj1pFoT5xs7BdQXmgCNlqDO9oU00VeRq839dX5Ueci1F2uT FHbw== X-Gm-Message-State: AOAM5320YG7djDOIZ807lUYB14T/hvYEl8oyZ+O3nyxz8PTz6XqPqRM/ kajH4bYkCtv1EjKJc7Oj09Wj41QLoPS5zbI/rA3n0TLahwW3jc0lnFZ4cOPXm44stfF1aQzKRxZ rXaHSGS2x/FpK X-Received: by 2002:adf:a48c:: with SMTP id g12mr6772211wrb.341.1634219402591; 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: bpf@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