linux-kernel - RE: XFS memory allocation deadlock in 2.6.38

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: <081DDE43F61F3D43929A181B477DCA95639B5349@MSXAOA6.twosigma.com>
Date:	Mon, 28 Mar 2011 10:58:53 -0400
From:	Sean Noonan <Sean.Noonan@...sigma.com>
To:	'Michel Lespinasse' <walken@...gle.com>,
	Christoph Hellwig <hch@...radead.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Martin Bligh <Martin.Bligh@...sigma.com>,
	Trammell Hudson <Trammell.Hudson@...sigma.com>,
	Christos Zoulas <Christos.Zoulas@...sigma.com>,
	"linux-xfs@....sgi.com" <linux-xfs@....sgi.com>,
	Stephen Degler <Stephen.Degler@...sigma.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: RE: XFS memory allocation deadlock in 2.6.38

> Regarding the deadlock: I am curious to see if it could be made to
> happen before 5ecfda041e4b4bd858d25bbf5a16c2a6c06d7272. Could you test
> what happens if you remove the MAP_POPULATE flag from your mmap call,
> and instead read all pages from userspace right after the mmap ? I
> expect you would then be able to trigger the deadlock before
> 5ecfda041e4b4bd858d25bbf5a16c2a6c06d7272.

I still see the deadlock without MAP_POPULATE

Sean
--
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/