From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 3 Aug 2013 14:37:48 +0000 (+0200)
Subject: usb: config->desc.bLength may not exceed amount of data returned by the device
X-Git-Tag: v3.2.52~129
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f4705f790d07d747c236a074f1c82f941244025;p=pandora-kernel.git

usb: config->desc.bLength may not exceed amount of data returned by the device

commit b4f17a488ae2e09bfcf95c0e0b4219c246f1116a upstream.

While reading the config parsing code I noticed this check is missing, without
this check config->desc.wTotalLength can end up with a value larger then the
dev->rawdescriptors length for the config, and when userspace then tries to
get the rawdescriptors bad things may happen.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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