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Commit c795d878 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
Browse files

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: cf7776dc ("[PATCH] isdn4linux: Siemens Gigaset drivers - direct USB connection")
Cc: Hansjoerg Lipp <hjlipp@web.de>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 033850b9

drivers/isdn/gigaset/bas-gigaset.c

+3 −0
Original line number Diff line number Diff line
@@ -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),