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| author | Johan Hovold <johan@kernel.org> | 2017-03-16 18:35:12 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 07:41:23 (GMT) |
| commit | 83d920e464fafb738be14096cd1cf3c983d8bab4 (patch) | |
| tree | b07437c7ee3f03933b5c0590307d0d6e6f5111bb | |
| parent | 9f6a8dca9874ca923dbb253a96e9f4a537643b9d (diff) | |
| download | linux-83d920e464fafb738be14096cd1cf3c983d8bab4.tar.xz | |
Input: cm109 - validate number of endpoints before using them
commit ac2ee9ba953afe88f7a673e1c0c839227b1d7891 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Fixes: c04148f915e5 ("Input: add driver for USB VoIP phones with CM109...")
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>
| -rw-r--r-- | drivers/input/misc/cm109.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c index 9cc6d05..23c191a 100644 --- a/drivers/input/misc/cm109.c +++ b/drivers/input/misc/cm109.c @@ -700,6 +700,10 @@ static int cm109_usb_probe(struct usb_interface *intf, int error = -ENOMEM; interface = intf->cur_altsetting; + + if (interface->desc.bNumEndpoints < 1) + return -ENODEV; + endpoint = &interface->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) |