diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:39:29 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-05-17 15:07:02 -0400 |
| commit | f1ba9cf0277683f9067f50244f676117702faf3e (patch) | |
| tree | 1b34b14b17a18165f32b1da2fcab75a06716485f /drivers/input | |
| parent | 36d425fcc1649915479341bc91fbe3650b316f37 (diff) | |
Input: hanwang - validate number of endpoints before using them
[ Upstream commit ba340d7b83703768ce566f53f857543359aa1b98 ]
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Fixes: bba5394ad3bd ("Input: add support for Hanwang tablets")
Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: stable@vger.kernel.org # 2.6.37
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/hanwang.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/tablet/hanwang.c b/drivers/input/tablet/hanwang.c index cd852059b99e..df4bea96d7ed 100644 --- a/drivers/input/tablet/hanwang.c +++ b/drivers/input/tablet/hanwang.c @@ -340,6 +340,9 @@ static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id int error; int i; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL); input_dev = input_allocate_device(); if (!hanwang || !input_dev) { |