diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:41:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:35:15 +0200 |
| commit | b3c4c0c470b58dd4a5e40e11ccd9fea7fbbfa799 (patch) | |
| tree | 631255c6fdaa671b8e2fb71fb541a4bdb81d0f39 /drivers/input | |
| parent | c05490638ddfffa35d2fb03c1852f9013757a9e1 (diff) | |
Input: kbtab - validate number of endpoints before using them
commit cb1b494663e037253337623bf1ef2df727883cb7 upstream.
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>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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) |