patch "USB: serial: pl2303: fix NULL-deref at open" added to usb-linus

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

USB: serial: pl2303: fix NULL-deref at open

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: Tue, 3 Jan 2017 16:40:00 +0100
Subject: USB: serial: pl2303: fix NULL-deref at open

Fix NULL-pointer dereference in open() should a type-0 or type-1 device lack the expected endpoints:

Unable to handle kernel NULL pointer dereference at virtual address 00000030

...
PC is at pl2303_open+0x38/0xec [pl2303]

Note that a missing interrupt-in endpoint would have caused open() to fail.

---
 drivers/usb/serial/pl2303.c | 8 ++++++++
 1 file changed, 8 insertions(+)

index ae682e4eeaef..46fca6b75846 100644
@@ -220,9 +220,17 @@ static int pl2303_probe(struct usb_serial *serial,
 static int pl2303_startup(struct usb_serial *serial)
 {
 	struct pl2303_serial_private *spriv;
+	unsigned char num_ports = serial->num_ports;
 	enum pl2303_type type = TYPE_01;
 	unsigned char *buf;
 
+	if (serial->num_bulk_in < num_ports ||
+			serial->num_bulk_out < num_ports ||
+			serial->num_interrupt_in < num_ports) {
+		dev_err(&serial->interface->dev, "missing endpoints\n");
+		return -ENODEV;
+	}
+
 	spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
 	if (!spriv)
 		return -ENOMEM;

2.11.0