From cda8e22085fc1623f91bed76bb9c8b541fe019c0 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 13 Mar 2017 13:39:01 +0100 Subject: [PATCH] isdn/gigaset: fix NULL-deref at probe 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 Signed-off-by: Johan Hovold Signed-off-by: David S. Miller Signed-off-by: Ben Hutchings --- 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 492aa520b9df..dc0b0b822045 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -2314,6 +2314,9 @@ 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), -- 2.39.2