USB: serial: fix potential NULL-dereference at probe
authorJohan Hovold <johan@kernel.org>
Fri, 21 Oct 2016 10:56:27 +0000 (12:56 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 10 Nov 2016 15:36:33 +0000 (16:36 +0100)
commitf2ecc94504f40d6022c39207c9149a0cf071c2eb
tree7222a1f8bb8192e2621fb67e1ff70f2164744866
parent660c04e8f1742e50237c1f12dab6b66212fa168a
USB: serial: fix potential NULL-dereference at probe

commit 126d26f66d9890a69158812a6caa248c05359daa upstream.

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")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/usb-serial.c