netdev - Re: [PATCH 2/2] net: spider_net: avoid using signed char for bitops

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: <9201792.OAu7xPjvdN@wuerfel>
Date:	Fri, 03 Oct 2014 17:15:05 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	dan.carpenter@...cle.com, kou.ishizaki@...hiba.co.jp,
	jens@...ibm.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] net: spider_net: avoid using signed char for bitops

On Friday 03 October 2014 17:01:56 Antoine Tenart wrote:
> Signedness bugs may occur when using signed char for bitops,
> depending on if the highest bit is ever used.
> 
> Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
> 

It's probably worth mentioning here that this cannot happen in this
driver because it's only used in one powerpc-specific chip, and 'char'
is always 'unsigned' on powerpc.

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html