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| author |   Johan Hovold <johan@kernel.org> | 2017-03-16 11:39:29 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-03-16 13:56:52 -0700 |
| commit | ba340d7b83703768ce566f53f857543359aa1b98 (patch) | |
| tree | db3c84d288b2bbc111fcf4ccaba5d3aa79591dc5 | |
| parent | Input: yealink - validate number of endpoints before using them (diff) | |
| download | linux-dev-ba340d7b83703768ce566f53f857543359aa1b98.tar.xz linux-dev-ba340d7b83703768ce566f53f857543359aa1b98.zip | |
Input: hanwang - 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.
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>
| -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) { |