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| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:43:09 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-03-16 13:56:54 -0700 |
| commit | 92461f5d723037530c1f36cce93640770037812c (patch) | |
| tree | 89b2cd0328aafea7d6e311ee9998f8dd489fd4ec /drivers/input/touchscreen | |
| parent | cb1b494663e037253337623bf1ef2df727883cb7 (diff) | |
| download | linux-92461f5d723037530c1f36cce93640770037812c.tar.gz linux-92461f5d723037530c1f36cce93640770037812c.tar.bz2 linux-92461f5d723037530c1f36cce93640770037812c.zip | |
Input: sur40 - validate number of endpoints before using them
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>
Cc: stable@vger.kernel.org # 3.13
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/sur40.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c index aefb6e11f88a..4c0eecae065c 100644 --- a/drivers/input/touchscreen/sur40.c +++ b/drivers/input/touchscreen/sur40.c @@ -527,6 +527,9 @@ static int sur40_probe(struct usb_interface *interface, 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) |