From: Johan Hovold <johan@xxxxxxxxxx> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 68c32f9c2a36d410aa242e661506e5b2c2764179 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: cf7776dc05b8 ("[PATCH] isdn4linux: Siemens Gigaset drivers - direct USB connection") Cc: Hansjoerg Lipp <hjlipp@xxxxxx> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/isdn/gigaset/bas-gigaset.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index c44950d3eb7b..6d4d9c1c2cf0 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -2317,6 +2317,9 @@ static int gigaset_probe(struct usb_interface *interface, return -ENODEV; } + if (hostif->desc.bNumEndpoints < 1) + return -ENODEV; + dev_info(&udev->dev, "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", __func__, le16_to_cpu(udev->descriptor.idVendor), -- 2.12.2