From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752809AbcKHXN6 (ORCPT ); Tue, 8 Nov 2016 18:13:58 -0500 Received: from mail.us.es ([193.147.175.20]:60008 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751100AbcKHXNz (ORCPT ); Tue, 8 Nov 2016 18:13:55 -0500 Date: Wed, 9 Nov 2016 00:13:13 +0100 From: Pablo Neira Ayuso To: Shuah Khan Cc: kaber@trash.net, kadlec@blackhole.kfki.hu, davem@davemloft.net, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] net/netfilter: Fix use uninitialized warn in nft_range_eval() Message-ID: <20161108231313.GA6329@salvia> References: <20161107154114.26803-1-shuahkh@osg.samsung.com> <20161107154114.26803-4-shuahkh@osg.samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20161107154114.26803-4-shuahkh@osg.samsung.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 07, 2016 at 08:41:14AM -0700, Shuah Khan wrote: > Fix the following warn: > > CC [M] net/netfilter/nft_range.o > 8601,8605c9105 > net/netfilter/nft_range.c: In function ‘nft_range_eval’: > net/netfilter/nft_range.c:45:5: warning: ‘mismatch’ may be used uninitialized in this function [-Wmaybe-uninitialized] > if (mismatch) > ^ You probably using an old tree snapshot? This was already fixed by: commit d2e4d593516e877f1f6fb40031eb495f36606e16 Author: Arnd Bergmann Date: Tue Oct 18 00:05:30 2016 +0200 netfilter: nf_tables: avoid uninitialized variable warning The newly added nft_range_eval() function handles the two possible nft range operations, but as the compiler warning points out, any unexpected value would lead to the 'mismatch' variable being used without being initialized: