diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:35:12 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-05-17 15:07:02 -0400 |
| commit | 6585effe7d220f2fef5c07a3c499584cc05ee275 (patch) | |
| tree | 84976d9b057b8a1d1f0233ddb1126ccb0814f7c4 /drivers/input | |
| parent | 76d981017361e0937f2f2c83fe7b02b590e74bdd (diff) | |
Input: cm109 - validate number of endpoints before using them
[ Upstream commit ac2ee9ba953afe88f7a673e1c0c839227b1d7891 ]
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>
Cc: stable@vger.kernel.org # 2.6.28
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers/input')
| -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 9365535ba7f1..50a7faa504f7 100644 --- a/drivers/input/misc/cm109.c +++ b/drivers/input/misc/cm109.c @@ -675,6 +675,10 @@ 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)) |