4.2.8-ckt4 -stable review patch. If anyone has any objections, please let me
know.
---8<------------------------------------------------------------
From: Johan Hovold <jo...@kernel.org>
commit cac9b50b0d75a1d50d6c056ff65c005f3224c8e0 upstream.
Fix null-pointer dereference at probe should a (malicious) Treo device
lack the expected endpoints.
Specifically, the Treo port-setup hack was dereferencing the bulk-in and
interrupt-in urbs without first making sure they had been allocated by
core.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <jo...@kernel.org>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/usb/serial/visor.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 60afb39..c53fbb3 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -544,6 +544,11 @@ static int treo_attach(struct usb_serial *serial)
(serial->num_interrupt_in == 0))
return 0;
+ if (serial->num_bulk_in < 2 || serial->num_interrupt_in < 2) {
+ dev_err(&serial->interface->dev, "missing endpoints\n");
+ return -ENODEV;
+ }
+
/*
* It appears that Treos and Kyoceras want to use the
* 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
--
1.9.1
