Hans de Goede ef7198be28 usb: config->desc.bLength may not exceed amount of data returned by the device ...

commit b4f17a488a 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>

2013-09-26 17:18:12 -07:00

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