Make sure we have at least one port before attempting to register a
console.
Currently, at least one driver binds to a "dummy" interface and requests
zero ports for it. Should such an interface also lack endpoints, we get
a NULL-deref during probe.
Fixes: e5b1e2062e05 ("USB: serial: make minor allocation dynamic")
Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.11
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
drivers/usb/serial/usb-serial.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index d213cf44a7e4..4a037b4a79cf 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1078,7 +1078,8 @@ static int usb_serial_probe(struct usb_interface *interface,
serial->disconnected = 0;
- usb_serial_console_init(serial->port[0]->minor);
+ if (num_ports > 0)
+ usb_serial_console_init(serial->port[0]->minor);
exit:
module_put(type->driver.owner);
return 0;
--
2.7.3
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