linux-kernel - Re: strict copy_from

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] [day] [month] [year] [list]

Date:	Sat, 09 Jan 2010 12:57:10 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Arjan van de Ven <arjan@...radead.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: strict copy_from_user checks issues?

On 01/09/2010 12:01 AM, Arnd Bergmann wrote:
> On Saturday 09 January 2010, H. Peter Anvin wrote:
>>>       return put_user(data, uptr);
>>>
>>> The latter form requires a macro instead of a function for the user copy,
>>> but we now have that anyway because of the size check.
>>>
>>
>> Well... we already have the latter form?
> 
> Right, but my suggestion was to extend that do data structures in
> addition to the scalars we are supporting now.
> 
> 	Arnd

Structures, as in "struct"?  That would seem to be a good idea.  Arrays,
which can be dynamically sized, are trickier.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

--
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/