cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status
commiteb08a285899df82056f712421988c6ccd0b58ba6
authorScott Bauer <scott.bauer@intel.com>
Thu, 26 Apr 2018 17:51:08 +0000 (26 11:51 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 5 Sep 2018 07:18:41 +0000 (5 09:18 +0200)
tree300591467345986c84c77247a803929db2d03967
parentaba1ba97e64f2e6971df812fc45985222356cdd5
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>
drivers/cdrom/cdrom.c