Commit 76ab439e authored by Johan Hovold's avatar Johan Hovold
Browse files

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.

Fixes: 1da177e4

 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 5afeef23
......@@ -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;
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment