From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=iNRz=MO=vger.kernel.org=linux-kernel-owner@kernel.org>
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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham
	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 BC099C43143
	for <linux-kernel@archiver.kernel.org>; Tue,  2 Oct 2018 12:43:57 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 8D1D2206B2
	for <linux-kernel@archiver.kernel.org>; Tue,  2 Oct 2018 12:43:57 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8D1D2206B2
Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=iogearbox.net
Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1727826AbeJBT1F (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Tue, 2 Oct 2018 15:27:05 -0400
Received: from www62.your-server.de ([213.133.104.62]:39856 "EHLO
        www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1727690AbeJBT1E (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 2 Oct 2018 15:27:04 -0400
Received: from [88.198.220.130] (helo=sslproxy01.your-server.de)
        by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256)
        (Exim 4.89_1)
        (envelope-from <daniel@iogearbox.net>)
        id 1g7K1p-0008St-CJ; Tue, 02 Oct 2018 14:43:53 +0200
Received: from [62.203.87.61] (helo=linux.home)
        by sslproxy01.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256)
        (Exim 4.89)
        (envelope-from <daniel@iogearbox.net>)
        id 1g7K1p-0001ll-52; Tue, 02 Oct 2018 14:43:53 +0200
Subject: Re: [PATCH bpf] bpf: don't accept cgroup local storage with zero
 value size
To:     Roman Gushchin <guro@fb.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Cc:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Kernel Team <Kernel-team@fb.com>,
        Alexei Starovoitov <ast@kernel.org>
References: <20181002024003.25635-1-guro@fb.com>
From:   Daniel Borkmann <daniel@iogearbox.net>
Message-ID: <8e6010ef-4e72-d167-8016-dda3fbbf8e5e@iogearbox.net>
Date:   Tue, 2 Oct 2018 14:43:52 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.3.0
MIME-Version: 1.0
In-Reply-To: <20181002024003.25635-1-guro@fb.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-Authenticated-Sender: daniel@iogearbox.net
X-Virus-Scanned: Clear (ClamAV 0.100.1/24999/Tue Oct  2 06:46:11 2018)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 10/02/2018 04:41 AM, Roman Gushchin wrote:
> Explicitly forbid creating cgroup local storage maps with zero value
> size, as it makes no sense and might even cause a panic.
> 
> Reported-by: syzbot+18628320d3b14a5c459c@syzkaller.appspotmail.com
> Signed-off-by: Roman Gushchin <guro@fb.com>
> Cc: Alexei Starovoitov <ast@kernel.org>
> Cc: Daniel Borkmann <daniel@iogearbox.net>

Applied to bpf, thanks Roman!