diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:35:12 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-07-18 18:38:34 +0100 |
| commit | 91b1397df10443bd9ccbc50fbe21fcb3c361d104 (patch) | |
| tree | 212d8bedb2a1203f6cd5f026501c92f64c287dc5 /drivers/input/misc | |
| parent | 12fe624c8378896115a26f89f095c37dcab8784b (diff) | |
Input: cm109 - validate number of endpoints before using them
commit ac2ee9ba953afe88f7a673e1c0c839227b1d7891 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Fixes: c04148f915e5 ("Input: add driver for USB VoIP phones with CM109...")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/input/misc')
| -rw-r--r-- | drivers/input/misc/cm109.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c index ab860511f016..d5b382ca34ec 100644 --- a/drivers/input/misc/cm109.c +++ b/drivers/input/misc/cm109.c @@ -663,6 +663,10 @@ static int cm109_usb_probe(struct usb_interface *intf, int error = -ENOMEM; interface = intf->cur_altsetting; + + if (interface->desc.bNumEndpoints < 1) + return -ENODEV; + endpoint = &interface->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) |