tree 1254771703809abd60d727cd541b977eabdc6236
parent a4887ea588e9bf515e43094bb09be21e13ee0908
author Johan Hovold <johan@kernel.org> 1489409271 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1490859684 +0200

USB: wusbcore: fix NULL-deref at probe

commit 03ace948a4eb89d1cf51c06afdfc41ebca5fdb27 upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer or accessing memory beyond the endpoint array should a
malicious device lack the expected endpoints.

This specifically fixes the NULL-pointer dereference when probing HWA HC
devices.

Fixes: df3654236e31 ("wusb: add the Wire Adapter (WA) core")
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>