On Tue, Jun 24, 2014 at 02:23:20PM -0400, Jeff Moyer wrote:
> Benjamin LaHaise <[email protected]> writes:
>
> > A kernel memory disclosure was introduced in aio_read_events_ring() in v3.10
> > by commit a31ad380bed817aa25f8830ad23e1a0480fef797. The changes made to
> > aio_read_events_ring() failed to correctly limit the index into
> > ctx->ring_pages[], allowing an attacked to cause the subsequent kmap() of
> > an arbitrary page with a copy_to_user() to copy the contents into userspace.
> > This vulnerability has been assigned CVE-2014-0206. Thanks to Mateusz and
> > Petr for disclosing this issue.
> >
> > This patch applies to v3.12+. A separate backport is needed for 3.10/3.11.
>
> Note that a 3.10 backport will need to remove this line from free_ioctx
> as well:
> atomic_sub(avail, &ctx->reqs_active);
>
> Reviewed-by: Jeff Moyer <[email protected]>
Can you post the backport for 3.10 so the -stable folks have something they
can use that was tested? Cheers,
-ben
--
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