From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751280AbaLPXJU (ORCPT ); Tue, 16 Dec 2014 18:09:20 -0500 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:56634 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750899AbaLPXJS (ORCPT ); Tue, 16 Dec 2014 18:09:18 -0500 Message-Id: <1418771356.3449499.203748285.4B1A82B8@webmail.messagingengine.com> X-Sasl-Enc: Q5LOdyRWFvxXa++bgj3bo2J0d7HfMnMoE2mmENVaQ9Qt 1418771356 From: Hannes Frederic Sowa To: Eric Dumazet , Sasha Levin Cc: "David S. Miller" , LKML , netdev@vger.kernel.org, Andrey Ryabinin , Dave Jones MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Mailer: MessagingEngine.com Webmail Interface - ajax-e9370556 Subject: Re: net: integer overflow in ip_idents_reserve Date: Wed, 17 Dec 2014 00:09:16 +0100 In-Reply-To: <1418766460.9773.48.camel@edumazet-glaptop2.roam.corp.google.com> References: <5490A1F8.6020207@oracle.com> <1418766460.9773.48.camel@edumazet-glaptop2.roam.corp.google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 16, 2014, at 22:47, Eric Dumazet wrote: > On Tue, 2014-12-16 at 16:19 -0500, Sasha Levin wrote: > > Hi Eric, > > > > While fuzzing with trinity on a -next kernel with the undefined behaviour > > sanitizer path, I've observed the following warning in code which was > > introduced in 04ca6973f7 ("ip: make IP identifiers less predictable"): > > This is a false positive. Also we compile the whole kernel with -fno-strict-overflow, so every report of signed overflow leading to undefined behavior is probably a false positive. I don't know if it is worth to try to get rid of them, I doubt it. Bye, Hannes