From: Kees Cook <keescook@chromium.org>
Date: Wed, 28 Aug 2013 20:29:55 +0000 (+0200)
Subject: HID: validate HID report id size
X-Git-Tag: v3.12-rc1~125^2~1^7~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43622021d2e2b82ea03d883926605bdd0525e1d1;p=pandora-kernel.git

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>
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