diff options
| author | Benjamin LaHaise <bcrl@kvack.org> | 2014-06-24 19:32:51 +0200 |
|---|---|---|
| committer | Benjamin LaHaise <bcrl@kvack.org> | 2014-06-24 19:46:01 +0200 |
| commit | edfbbf388f293d70bf4b7c0bc38774d05e6f711a (patch) | |
| tree | 9603bc6513868d7c28052ac1e96e6bbff7121063 /net | |
| parent | aio: fix aio request leak when events are reaped by userspace (diff) | |
| download | linux-edfbbf388f293d70bf4b7c0bc38774d05e6f711a.tar.xz linux-edfbbf388f293d70bf4b7c0bc38774d05e6f711a.zip | |
aio: fix kernel memory disclosure in io_getevents() introduced in v3.10
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.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: Mateusz Guzik <mguzik@redhat.com>
Cc: Petr Matousek <pmatouse@redhat.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions