Date: Wed, 4 Dec 2013 11:26:42 +0100 From: Petr Matousek <pmatouse@...hat.com> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Hans J. Koch" <hjk@...sjkoch.de>, Nico Golde <oss-security+ml@...lde.de>, oss-security@...ts.openwall.com, "security@...nel.org" <security@...nel.org>, Dan Carpenter <dan.carpenter@...cle.com> Subject: Re: kernel: uio: CVE-2013-6763 [was: Re: some unstracked linux kernel security fixes] On Mon, Dec 02, 2013 at 07:44:53PM -0800, Linus Torvalds wrote: > On Mon, Dec 2, 2013 at 7:40 PM, Greg Kroah-Hartman > <gregkh@...uxfoundation.org> wrote: > > On Tue, Nov 26, 2013 at 01:18:39PM +0100, Petr Matousek wrote: > >> > > >> > IOW, with the current changes, isn't the functionality broken for > >> > non page-aligned addr and/or size? > > > > This should now be fixed in Linus's tree, right? > > Well, that depends on what you mean by "fixed". I was going to say no, but then saw b6550287. Just for the record, the CVE-2013-6763 fix consists of * uio part of 7314e613 * b6550287 > If somebody depended on "we'll just mmap the page(s) that contained > the partial and unaligned resource", then current git is very very > broken, because it doesn't allow that at all. Intuitively I'd assume that the rounding up in uio_mmap is there for a reason, but what do I know. Regards, -- Petr Matousek / Red Hat Security Response Team PGP: 0xC44977CA 8107 AF16 A416 F9AF 18F3 D874 3E78 6F42 C449 77CA
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