diff options
| author | Johan Hovold <johan@kernel.org> | 2020-01-10 11:55:47 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-01-10 14:42:53 -0800 |
| commit | bcfcb7f9b480dd0be8f0df2df17340ca92a03b98 (patch) | |
| tree | 872b828eb54f28c09c7ebc093349cc5db4459147 | |
| parent | 97e24b095348a15ec08c476423c3b3b939186ad7 (diff) | |
Input: pegasus_notetaker - fix endpoint sanity check
The driver was checking the number of endpoints of the first alternate
setting instead of the current one, something which could be used by a
malicious device (or USB descriptor fuzzer) to trigger a NULL-pointer
dereference.
Fixes: 1afca2b66aac ("Input: add Pegasus Notetaker tablet driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Martin Kepplinger <martink@posteo.de>
Acked-by: Vladis Dronov <vdronov@redhat.com>
Link: https://lore.kernel.org/r/20191210113737.4016-2-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | drivers/input/tablet/pegasus_notetaker.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c index a1f3a0cb197e..38f087404f7a 100644 --- a/drivers/input/tablet/pegasus_notetaker.c +++ b/drivers/input/tablet/pegasus_notetaker.c @@ -275,7 +275,7 @@ static int pegasus_probe(struct usb_interface *intf, return -ENODEV; /* Sanity check that the device has an endpoint */ - if (intf->altsetting[0].desc.bNumEndpoints < 1) { + if (intf->cur_altsetting->desc.bNumEndpoints < 1) { dev_err(&intf->dev, "Invalid number of endpoints\n"); return -EINVAL; } |