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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: bba5394ad3
("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>
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1 changed files with 3 additions and 0 deletions
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@ -340,6 +340,9 @@ static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id
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int error;
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int error;
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int i;
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int i;
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if (intf->cur_altsetting->desc.bNumEndpoints < 1)
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return -ENODEV;
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hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
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hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
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input_dev = input_allocate_device();
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input_dev = input_allocate_device();
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if (!hanwang || !input_dev) {
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if (!hanwang || !input_dev) {
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