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| author | Oliver Neukum <oneukum@suse.com> | 2019-08-01 18:44:25 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-08-01 19:55:21 +0200 |
| commit | c88090dfc84254fa149174eb3e6a8458de1912c4 (patch) | |
| tree | f47e16006571ba31212a8cb9c21b7a8383f7dd36 /drivers/input/tablet | |
| parent | Input: usbtouchscreen - initialize PM mutex before using it (diff) | |
| download | linux-c88090dfc84254fa149174eb3e6a8458de1912c4.tar.xz linux-c88090dfc84254fa149174eb3e6a8458de1912c4.zip | |
Input: kbtab - sanity check for endpoint type
The driver should check whether the endpoint it uses has the correct
type.
Reported-by: syzbot+c7df50363aaff50aa363@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/tablet')
| -rw-r--r-- | drivers/input/tablet/kbtab.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c index 04b85571f41e..aa577898e952 100644 --- a/drivers/input/tablet/kbtab.c +++ b/drivers/input/tablet/kbtab.c @@ -117,6 +117,10 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i if (intf->cur_altsetting->desc.bNumEndpoints < 1) return -ENODEV; + endpoint = &intf->cur_altsetting->endpoint[0].desc; + if (!usb_endpoint_is_int_in(endpoint)) + return -ENODEV; + kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); input_dev = input_allocate_device(); if (!kbtab || !input_dev) @@ -155,8 +159,6 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0); - endpoint = &intf->cur_altsetting->endpoint[0].desc; - usb_fill_int_urb(kbtab->irq, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress), kbtab->data, 8, |