linux-kernel - Re: [patch 11/17] hugetlbfs: support larger than MAX

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]

Message-ID: <20080411085928.GC20253@wotan.suse.de>
Date:	Fri, 11 Apr 2008 10:59:28 +0200
From:	Nick Piggin <npiggin@...e.de>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	akpm@...ux-foundation.org, Andi Kleen <ak@...e.de>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, pj@....com,
	kniht@...ux.vnet.ibm.com
Subject: Re: [patch 11/17] hugetlbfs: support larger than MAX_ORDER

On Fri, Apr 11, 2008 at 10:13:17AM +0200, Andi Kleen wrote:
> >  	spin_lock(&hugetlb_lock);
> > -	if (h->surplus_huge_pages_node[nid]) {
> > +	if (h->surplus_huge_pages_node[nid] && h->order <= MAX_ORDER) {
> 
> As Andrew Hastings pointed out earlier this all needs to be h->order < MAX_ORDER
> [got pretty much all the checks wrong off by one]. It won't affect anything
> on x86-64 but might cause problems on archs which have exactly MAX_ORDER
> sized huge pages.

Ah, hmm, I might have missed a couple of emails worth of feedback when
you last posted. Thanks for pointing this out, I'll read over them again.

--
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/