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: stable <stable@xxxxxxxxxxxxxxx> # 2.6.17
Cc: Hansjoerg Lipp <hjlipp@xxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
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 11e13c56126f..2da3ff650e1d 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),
--
2.12.0
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