diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:41:55 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-05-17 15:07:02 -0400 |
| commit | 84a91ce021050bd60f41fed78f8ffa83712c4db1 (patch) | |
| tree | 4520ea850b52a75f44b6a710a6a1e625c11f13c6 /drivers/input | |
| parent | f1ba9cf0277683f9067f50244f676117702faf3e (diff) | |
Input: kbtab - validate number of endpoints before using them
[ Upstream commit cb1b494663e037253337623bf1ef2df727883cb7 ]
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: stable@vger.kernel.org
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/tablet/kbtab.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c index d2ac7c2b5b82..2812f9236b7d 100644 --- a/drivers/input/tablet/kbtab.c +++ b/drivers/input/tablet/kbtab.c @@ -122,6 +122,9 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i struct input_dev *input_dev; int error = -ENOMEM; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); input_dev = input_allocate_device(); if (!kbtab || !input_dev) |