linux-kernel - Re: Intel PT decoder switch case fallthrough cases reported by gcc 7

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 9 Feb 2017 10:25:19 -0800
From:   Andi Kleen <andi@...stfloor.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <andi@...stfloor.org>, Jiri Olsa <jolsa@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Intel PT decoder switch case fallthrough cases reported by gcc 7

On Thu, Feb 09, 2017 at 01:50:39PM -0300, Arnaldo Carvalho de Melo wrote:
> Hi,
> 
> 	I've updated the container with Fedora Rawhide I use to build
> tools/perf/ and samples/bcc/ and it now comes with gcc 7, where I get
> things like:

FWIW, but it just shows that you should never ship software with -Werror
enabled. New compiler releases add new warnings, and you just randomly
break the build for users who use newer compilers.

It's ok to use in your own builds, but should never be default.

The kernel gets it right, but perf is wrong here.

-Andi