diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:35:12 -0700 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2017-06-08 00:47:05 +0200 |
| commit | 9a1526465e181f580a11c2a53fa809da2c11966a (patch) | |
| tree | b7d09316f6d019310a3073211b44925406b869cd /drivers | |
| parent | e121cd408c49a88c16a898b1e0fc419555db826e (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: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers')
| -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 082684e7f390..d6a35a713856 100644 --- a/drivers/input/misc/cm109.c +++ b/drivers/input/misc/cm109.c @@ -669,6 +669,10 @@ 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)) |