4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@xxxxxxxxxx>
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/isdn/gigaset/bas-gigaset.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -2317,6 +2317,9 @@ static int gigaset_probe(struct usb_inte
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),