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| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:41:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:44:03 +0200 |
| commit | fb50058c79702dc052eba5ea537145da30f57cf2 (patch) | |
| tree | e178d9ed0915f8938e1c8c02e3512509c1556cfb /drivers/input | |
| parent | 865b020ff2a1644ce5ef43022456a9dc14765477 (diff) | |
| download | talos-obmc-linux-fb50058c79702dc052eba5ea537145da30f57cf2.tar.gz talos-obmc-linux-fb50058c79702dc052eba5ea537145da30f57cf2.zip | |
Input: kbtab - validate number of endpoints before using them
commit cb1b494663e037253337623bf1ef2df727883cb7 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
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>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/tablet/kbtab.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c index e850d7e8afbc..4d9d64908b59 100644 --- a/drivers/input/tablet/kbtab.c +++ b/drivers/input/tablet/kbtab.c @@ -122,6 +122,9 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i struct input_dev *input_dev; int error = -ENOMEM; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); input_dev = input_allocate_device(); if (!kbtab || !input_dev) |
