From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933392AbcLIMMh (ORCPT ); Fri, 9 Dec 2016 07:12:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35264 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932782AbcLIMMg (ORCPT ); Fri, 9 Dec 2016 07:12:36 -0500 Date: Fri, 9 Dec 2016 07:12:32 -0500 From: Richard Guy Briggs To: Dmitry Vyukov Cc: netdev , LKML , linux-audit@redhat.com Subject: Re: netlink: GPF in sock_sndtimeo Message-ID: <20161209121232.GY22655@madcap2.tricolour.ca> References: <20161129164859.GD26673@madcap2.tricolour.ca> <20161130045207.GE26673@madcap2.tricolour.ca> <20161209060248.GT22655@madcap2.tricolour.ca> <20161209114847.GX22655@madcap2.tricolour.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 09 Dec 2016 12:12:35 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2016-12-09 12:53, Dmitry Vyukov wrote: > On Fri, Dec 9, 2016 at 12:48 PM, Richard Guy Briggs wrote: > > On 2016-12-09 11:49, Dmitry Vyukov wrote: > >> On Fri, Dec 9, 2016 at 7:02 AM, Richard Guy Briggs wrote: > >> > On 2016-11-29 23:52, Richard Guy Briggs wrote: > >> > I tried a quick compile attempt on the test case (I assume it is a > >> > socket fuzzer) and get the following compile error: > >> > cc -g -O0 -Wall -D_GNU_SOURCE -o socket_fuzz socket_fuzz.c > >> > socket_fuzz.c:16:1: warning: "_GNU_SOURCE" redefined > >> > : warning: this is the location of the previous definition > >> > socket_fuzz.c: In function ‘segv_handler’: > >> > socket_fuzz.c:89: warning: implicit declaration of function ‘__atomic_load_n’ > >> > socket_fuzz.c:89: error: ‘__ATOMIC_RELAXED’ undeclared (first use in this function) > >> > socket_fuzz.c:89: error: (Each undeclared identifier is reported only once > >> > socket_fuzz.c:89: error: for each function it appears in.) > >> > socket_fuzz.c: In function ‘loop’: > >> > socket_fuzz.c:280: warning: unused variable ‘errno0’ > >> > socket_fuzz.c: In function ‘test’: > >> > socket_fuzz.c:303: warning: implicit declaration of function ‘__atomic_fetch_add’ > >> > socket_fuzz.c:303: error: ‘__ATOMIC_SEQ_CST’ undeclared (first use in this function) > >> > socket_fuzz.c:303: warning: implicit declaration of function ‘__atomic_fetch_sub’ > >> > >> -std=gnu99 should help > >> ignore warnings > > > > I got a little further, left with "__ATOMIC_RELAXED undeclared", "__ATOMIC_SEQ_CST > > undeclared" under gcc 4.4.7-16. > > > > gcc 4.8.2-15 leaves me with "undefined reference to `clock_gettime'" > > add -lrt Ok, that helped. Thanks! > > What compiler version do you recommend? > > 6.x sounds reasonable > 4.4 branch is 7.5 years old, surprised that it does not disintegrate > into dust yet :) These are under RHEL6... so there are updates to them, but yeah, they are old. > >> >> - RGB > >> > > >> > - RGB > > > > - RGB > > > > -- > > Richard Guy Briggs > > Kernel Security Engineering, Base Operating Systems, Red Hat > > Remote, Ottawa, Canada > > Voice: +1.647.777.2635, Internal: (81) 32635 - RGB -- Richard Guy Briggs Kernel Security Engineering, Base Operating Systems, Red Hat Remote, Ottawa, Canada Voice: +1.647.777.2635, Internal: (81) 32635