[patch 032/149] USB: ir-usb: fix double free

Greg KH
2010-07-01T18:49:43Z

2.6.32-stable review patch. If anyone has any objections, please let us know.

------------------

From: Johan Hovold <jhovold@gmail.com>

commit 2ff78c0c2b67120c8e503268da3f177cae2228a2 upstream.

If the user specifies a custom bulk buffer size we get a double free at
port release.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/serial/ir-usb.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -312,6 +312,7 @@ static int ir_open(struct tty_struct *tt
kfree(port->read_urb->transfer_buffer);
port->read_urb->transfer_buffer = buffer;
port->read_urb->transfer_buffer_length = buffer_size;
+ port->bulk_in_buffer = buffer;

buffer = kmalloc(buffer_size, GFP_KERNEL);
if (!buffer) {
@@ -321,6 +322,7 @@ static int ir_open(struct tty_struct *tt
kfree(port->write_urb->transfer_buffer);
port->write_urb->transfer_buffer = buffer;
port->write_urb->transfer_buffer_length = buffer_size;
+ port->bulk_out_buffer = buffer;
port->bulk_out_size = buffer_size;
}