linux-kernel - RE: [PATCH] Linux VM workaround for Knights Landing A/D leak

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]

Date:	Tue, 14 Jun 2016 16:54:30 +0000
From:	"Anaczkowski, Lukasz" <lukasz.anaczkowski@...el.com>
To:	Nadav Amit <nadav.amit@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
	"mhocko@...e.com" <mhocko@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Srinivasappa, Harish" <harish.srinivasappa@...el.com>,
	"Odzioba, Lukasz" <lukasz.odzioba@...el.com>
Subject: RE: [PATCH] Linux VM workaround for Knights Landing A/D leak

From: Nadav Amit [mailto:nadav.amit@...il.com] 
Sent: Tuesday, June 14, 2016 6:48 PM

> Lukasz Anaczkowski <lukasz.anaczkowski@...el.com> wrote:

>> From: Andi Kleen <ak@...ux.intel.com>
>> +void fix_pte_leak(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
>> +{
> Here there should be a call to smp_mb__after_atomic() to synchronize with
> switch_mm. I submitted a similar patch, which is still pending (hint).

Thanks, Nadav!
I'll add this and re-submit the patch.

Cheers,
Lukasz