diff options
| author | John Pittman <jpittman@redhat.com> | 2019-11-11 16:43:20 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-01 09:17:36 +0100 |
| commit | a268d985f08935f565937cf36f0c1a1e0ca04ad3 (patch) | |
| tree | cd584dcf953f345186cda05a1273c8a8e3d78148 /include/linux/input | |
| parent | f8dc0350d32bc4c7c3b27698bbde319ca1e632a3 (diff) | |
md/raid10: prevent access of uninitialized resync_pages offset
commit 45422b704db392a6d79d07ee3e3670b11048bd53 upstream.
Due to unneeded multiplication in the out_free_pages portion of
r10buf_pool_alloc(), when using a 3-copy raid10 layout, it is
possible to access a resync_pages offset that has not been
initialized. This access translates into a crash of the system
within resync_free_pages() while passing a bad pointer to
put_page(). Remove the multiplication, preventing access to the
uninitialized area.
Fixes: f0250618361db ("md: raid10: don't use bio's vec table to manage resync pages")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: John Pittman <jpittman@redhat.com>
Suggested-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/input')
0 files changed, 0 insertions, 0 deletions