linux-kernel - Re: [PATCH, re-send] Always trap on BUG()

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]

Message-ID: <51EE52BE.5080204@zytor.com>
Date:	Tue, 23 Jul 2013 02:54:06 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Chen Gang <gang.chen@...anux.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH, re-send] Always trap on BUG()

On 07/23/2013 02:36 AM, Ingo Molnar wrote:
>>
>> Well, there are three alternatives here, right:
>>
>> 1. We can use unreachable(), which means that the compiler can assume it
>> never happens.
> 
> AFAICS this is dangerous as it loses warnings and moves execution into 
> la-la-land without any obvious sign at the C level.
> 

Extremely dangerous.

	-hpa

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/