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Date: Sun, 16 Jul 2017 14:56:46 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Johan Hovold" <johan@...nel.org>, "Dmitry Torokhov" <dmitry.torokhov@...il.com> Subject: [PATCH 3.16 060/178] Input: hanwang - validate number of endpoints before using them 3.16.46-rc1 review patch. If anyone has any objections, please let me know. ------------------ 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: Ben Hutchings <ben@...adent.org.uk> --- drivers/input/tablet/hanwang.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/input/tablet/hanwang.c +++ b/drivers/input/tablet/hanwang.c @@ -340,6 +340,9 @@ static int hanwang_probe(struct usb_inte 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) {
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