diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:39:29 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-22 07:15:03 +0200 |
| commit | 1a215bc8af3f9090238e9f6f85d5d5deddf88fb6 (patch) | |
| tree | 5e06fc929057e08a6363943a7a5be3f41f0480aa /drivers | |
| parent | 0c0454a88f398f70d9621d568a0f8040baf5469b (diff) | |
Input: hanwang - validate number of endpoints before using them
commit ba340d7b83703768ce566f53f857543359aa1b98 upstream.
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>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -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) { |