patch "USB: serial: io_ti: fix NULL-deref in interrupt callback" added to usb-linus

This is a note to let you know that I've just added the patch titled

USB: serial: io_ti: fix NULL-deref in interrupt callback

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Johan Hovold <[email protected]>
Date: Mon, 6 Mar 2017 17:36:37 +0100
Subject: USB: serial: io_ti: fix NULL-deref in interrupt callback

Fix a NULL-pointer dereference in the interrupt callback should a malicious device send data containing a bad port number by adding the missing sanity check.

---
 drivers/usb/serial/io_ti.c | 6 ++++++
 1 file changed, 6 insertions(+)

index ceaeebaa6f90..4561dd4cde8b 100644
@@ -1674,6 +1674,12 @@ static void edge_interrupt_callback(struct urb *urb)
 	function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
 	dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
 		port_number, function, data[1]);
+
+	if (port_number >= edge_serial->serial->num_ports) {
+		dev_err(dev, "bad port number %d\n", port_number);
+		goto exit;
+	}
+
 	port = edge_serial->serial->port[port_number];
 	edge_port = usb_get_serial_port_data(port);
 	if (!edge_port) {

2.12.0