cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status
commit2f294385874e8e152f357531aa177a19560c8a64
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 07:16:24 +0000 (5 09:16 +0200)
tree952a152a4529ca5c46383654694532cef5268ef7
parent86c0a645ffd20ee8e6063f1e9dfba07d35fded5e
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