linux-kernel - Re: [tip:x86/mm] x86, mm: Set first MB as RW+NX

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:	Wed, 16 Jun 2010 20:36:27 -0400
From:	Siarhei Liakh <sliakh.lkml@...il.com>
To:	castet.matthieu@...e.fr
Cc:	linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...ux.intel.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [tip:x86/mm] x86, mm: Set first MB as RW+NX

>> > Special accommodations have been made for BIOS32/PCI BIOS services:
>> > according to BIOS32 specification
>> > (http://members.datafast.net.au/dft0802/specs/bios32.pdf), at most two
>> > pages per BIOS32 service should be set executable and no pages need to
>> > be writeable.
>> From my understanding only the service directory take 2 pages.
>>
>> The no info for the pci service :
>> - the length field could be used to find the number of page it takes.
>> - could we assume data ro ?
>>
>
> http://members.datafast.net.au/dft0802/specs/bios21.pdf got all info for pci
> bios [1].
> So I was right : we shouldn't assume pci bios routine take only 2 pages, but use
> the length parameter.

Thanks for looking into this. I will be posting another patch shortly.
--
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/