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Date: Thu, 8 Jun 2017 00:59:27 +0200 From: Willy Tarreau <w@....eu> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, linux@...ck-us.net Cc: Johan Hovold <johan@...nel.org>, Dmitry Torokhov <dmitry.torokhov@...il.com>, Willy Tarreau <w@....eu> Subject: [PATCH 3.10 181/250] Input: hanwang - validate number of endpoints before using them From: Johan Hovold <johan@...nel.org> 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@...nel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com> Signed-off-by: Willy Tarreau <w@....eu> --- drivers/input/tablet/hanwang.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/input/tablet/hanwang.c b/drivers/input/tablet/hanwang.c index 5cc0412..263c85e 100644 --- a/drivers/input/tablet/hanwang.c +++ b/drivers/input/tablet/hanwang.c @@ -341,6 +341,9 @@ 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) { -- 2.8.0.rc2.1.gbe9624a
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