| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 036/111] Input: sur40 - validate number of endpoints before using them | Date | Tue, 28 Mar 2017 14:30:22 +0200 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold <johan@kernel.org>
commit 92461f5d723037530c1f36cce93640770037812c upstream.
Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory that lie beyond the end of the endpoint array should a malicious device lack the expected endpoints.
Fixes: bdb5c57f209c ("Input: add sur40 driver for Samsung SUR40... ") 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>
--- drivers/input/touchscreen/sur40.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/input/touchscreen/sur40.c +++ b/drivers/input/touchscreen/sur40.c @@ -527,6 +527,9 @@ static int sur40_probe(struct usb_interf if (iface_desc->desc.bInterfaceClass != 0xFF) return -ENODEV; + if (iface_desc->desc.bNumEndpoints < 5) + return -ENODEV; + /* Use endpoint #4 (0x86). */ endpoint = &iface_desc->endpoint[4].desc; if (endpoint->bEndpointAddress != TOUCH_ENDPOINT)
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