tree 0e497b63bf7ca81d49f3c9309cb70ee62119f938
parent 63a0f9de021aac2491be8466e44f35b07e3127b1
author Scott Bauer <scott.bauer@intel.com> 1524765068 -0600
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1536132402 +0200

cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status

commit 8f3fafc9c2f0ece10832c25f7ffcb07c97a32ad4 upstream.

Like d88b6d04: "cdrom: information leak in cdrom_ioctl_media_changed()"

There is another cast from unsigned long to int which causes
a bounds check to fail with specially crafted input. The value is
then used as an index in the slot array in cdrom_slot_status().

Signed-off-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Scott Bauer <sbauer@plzdonthack.me>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>