diff options
| author | Johan Hovold | 2017-03-13 13:47:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2017-03-14 17:07:30 +0800 |
| commit | 03ace948a4eb89d1cf51c06afdfc41ebca5fdb27 (patch) | |
| tree | b742d1c6a0b906700fe8757aa052ae80ea6b225e | |
| parent | f259ca3eed6e4b79ac3d5c5c9fb259fb46e86217 (diff) | |
USB: wusbcore: fix NULL-deref at probe
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer or accessing memory beyond the endpoint array should a
malicious device lack the expected endpoints.
This specifically fixes the NULL-pointer dereference when probing HWA HC
devices.
Fixes: df3654236e31 ("wusb: add the Wire Adapter (WA) core")
Cc: stable <stable@vger.kernel.org> # 2.6.28
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/wusbcore/wa-hc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wa-hc.c b/drivers/usb/wusbcore/wa-hc.c index 252c7bd9218a..d01496fd27fe 100644 --- a/drivers/usb/wusbcore/wa-hc.c +++ b/drivers/usb/wusbcore/wa-hc.c @@ -39,6 +39,9 @@ int wa_create(struct wahc *wa, struct usb_interface *iface, int result; struct device *dev = &iface->dev; + if (iface->cur_altsetting->desc.bNumEndpoints < 3) + return -ENODEV; + result = wa_rpipes_create(wa); if (result < 0) goto error_rpipes_create; |