3.2.87-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@xxxxxxxxxx>
commit cc0909248258f679c4bb4cd315565d40abaf6bc6 upstream.
Fix NULL-pointer dereference in open() should the device lack the
expected endpoints:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
...
PC is at spcp8x5_open+0x30/0xd0 [spcp8x5]
Fixes: 619a6f1d1423 ("USB: add usb-serial spcp8x5 driver")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
[bwh: Backported to 3.2: add this check to the existing
usb_serial_driver::attach implementation]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/usb/serial/spcp8x5.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -176,6 +176,13 @@ static int spcp8x5_startup(struct usb_se
int i;
enum spcp8x5_type type = SPCP825_007_TYPE;
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
+ unsigned char num_ports = serial->num_ports;
+
+ if (serial->num_bulk_in < num_ports ||
+ serial->num_bulk_out < num_ports) {
+ dev_err(&serial->interface->dev, "missing endpoints\n");
+ return -ENODEV;
+ }
if (product == 0x0201)
type = SPCP825_007_TYPE;