linux-kernel - Re: 2.6.37: *ERROR* Attempting to mmap a purgeable buffer

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:	Sun, 09 Jan 2011 12:52:50 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	"Carlos R. Mafra" <crmafra2@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.37: *ERROR* Attempting to mmap a purgeable buffer

On Sun, 9 Jan 2011 13:44:23 +0100, "Carlos R. Mafra" <crmafra2@...il.com> wrote:
> Is there something else I can do to help? Is this something fixable in the
> kernel or was it an error with my hardware? Suddenly being kicked out of X is 
> quite bad, so I hope this can be fixed :-)

It's a use after free bug in the ddx, presumably. I haven't worked out how
yet since all active buffers should be appropriately marked. So either
there is a race in marking the buffer, or we failed to handle an error
appropriately or there is a real use-after-free. The kernel is being
gracious enough to warn you why userspace just crashed.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
--
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/