HID: validate HID report id size
authorKees Cook <keescook@chromium.org>
Wed, 28 Aug 2013 20:29:55 +0000 (22:29 +0200)
committerJiri Kosina <jkosina@suse.cz>
Thu, 29 Aug 2013 09:01:25 +0000 (11:01 +0200)
commit43622021d2e2b82ea03d883926605bdd0525e1d1
treeeb347fb9b63e544151787d58f8940bdd957961a0
parent58c59bc997d86593f0bea41845885917cf304d22
HID: validate HID report id size

The "Report ID" field of a HID report is used to build indexes of
reports. The kernel's index of these is limited to 256 entries, so any
malicious device that sets a Report ID greater than 255 will trigger
memory corruption on the host:

[ 1347.156239] BUG: unable to handle kernel paging request at ffff88094958a878
[ 1347.156261] IP: [<ffffffff813e4da0>] hid_register_report+0x2a/0x8b

CVE-2013-2888

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-core.c
include/linux/hid.h