diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 19:41:55 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-03-16 21:56:53 +0100 |
| commit | cb1b494663e037253337623bf1ef2df727883cb7 (patch) | |
| tree | 4ce7f194f1357eb9a8f577a9e599f31fc22f2c7f /drivers/input/tablet | |
| parent | Input: hanwang - validate number of endpoints before using them (diff) | |
| download | linux-cb1b494663e037253337623bf1ef2df727883cb7.tar.xz linux-cb1b494663e037253337623bf1ef2df727883cb7.zip | |
Input: kbtab - validate number of endpoints before using them
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>
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 e850d7e8afbc..4d9d64908b59 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) |