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| author | Johan Hovold <johan@kernel.org> | 2017-03-16 11:41:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-22 07:15:04 +0200 |
| commit | c201e0b44896488c1b02515f08ece02bc106cb8d (patch) | |
| tree | b45a4c84506499e07f64394ecfc3870a064a901a /drivers/input | |
| parent | d1f5902b6bf1dff1efa02ca799a89917b8237f07 (diff) | |
| download | linux-stable-c201e0b44896488c1b02515f08ece02bc106cb8d.tar.gz linux-stable-c201e0b44896488c1b02515f08ece02bc106cb8d.tar.bz2 linux-stable-c201e0b44896488c1b02515f08ece02bc106cb8d.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 d2ac7c2b5b82..2812f9236b7d 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) |