tree eb347fb9b63e544151787d58f8940bdd957961a0
parent 58c59bc997d86593f0bea41845885917cf304d22
author Kees Cook <keescook@chromium.org> 1377721795 +0200
committer Jiri Kosina <jkosina@suse.cz> 1377766885 +0200

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>