netdev - Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized memory in __alloc

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: <4DAE7579.3020400@cs.helsinki.fi>
Date:	Wed, 20 Apr 2011 08:56:09 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Christoph Lameter <cl@...ux.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org, casteyde.christian@...e.fr,
	Vegard Nossum <vegardno@....uio.no>
Subject: Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized
 memory in __alloc_skb

On 4/19/11 11:17 PM, Eric Dumazet wrote:
> Le mardi 19 avril 2011 à 12:10 -0500, Christoph Lameter a écrit :
>> On Tue, 19 Apr 2011, Eric Dumazet wrote:
>>
>>>   	}
>>>   }
>>>
>>> -#ifdef CONFIG_CMPXCHG_LOCAL
>>> +#if defined(CONFIG_CMPXCHG_LOCAL)&&  \
>>> +	!defined(CONFIG_KMEMCHECK)&&  !defined(DEBUG_PAGEALLOC)
>>> +#define SLUB_USE_CMPXCHG_DOUBLE
>>> +#endif
>>> +
>>> +#ifdef SLUB_USE_CMPXCHG_DOUBLE
>>>   #ifdef CONFIG_PREEMPT
>>>   /*
>> Ugg.. Isnt there some way to indicate to kmemcheck that a speculative
>> access is occurring?
> Yes, here is a totally untested patch (only compiled here), to keep
> kmemcheck&  cmpxchg_double together.

Looks good to me! Can we get someone to test it as well?
--
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