From: Oliver Neukum <oneukum@suse.com>
Date: Tue, 15 Mar 2016 09:14:04 +0000 (+0100)
Subject: USB: cdc-acm: more sanity checking
X-Git-Tag: v3.2.80~68
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=c50eccdcbb5df7830e4a0229844a154855ac13ff;hp=c50eccdcbb5df7830e4a0229844a154855ac13ff;ds=inline

USB: cdc-acm: more sanity checking

commit 8835ba4a39cf53f705417b3b3a94eb067673f2c9 upstream.

An attack has become available which pretends to be a quirky
device circumventing normal sanity checks and crashes the kernel
by an insufficient number of interfaces. This patch adds a check
to the code path for quirky devices.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---