diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:41:55 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:20 +0200 |
| commit | 006fbc9601d0b130cead9b3cd525da8b01c7c005 (patch) | |
| tree | b1d4836a88435c0ebb3e4c9b009c3cca637853a4 /drivers/input/tablet | |
| parent | 2459faa29d2448d4b6242e73172b671dfe241b87 (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: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers/input/tablet')
| -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 3fba74b9b..f0d532684 100644 --- a/drivers/input/tablet/kbtab.c +++ b/drivers/input/tablet/kbtab.c @@ -123,6 +123,9 @@ 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) |