From: Johan Hovold johan@kernel.org
This patch has been added to the stable tree. If you have any objections, please let us know.
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[ Upstream commit 6e526fdff7be4f13b24f929a04c0e9ae6761291e ]
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.
The endpoints are specifically dereferenced in the i2400m_bootrom_init path during probe (e.g. in i2400mu_tx_bulk_out).
Fixes: f398e4240fce ("i2400m/USB: probe/disconnect, dev init/shutdown and reset backends") Cc: Inaky Perez-Gonzalez inaky@linux.intel.com
Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/net/wimax/i2400m/usb.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c index e7f5910a6519..f8eb66ef2944 100644 --- a/drivers/net/wimax/i2400m/usb.c +++ b/drivers/net/wimax/i2400m/usb.c @@ -467,6 +467,9 @@ int i2400mu_probe(struct usb_interface *iface, struct i2400mu *i2400mu; struct usb_device *usb_dev = interface_to_usbdev(iface);
+ if (iface->cur_altsetting->desc.bNumEndpoints < 4) + return -ENODEV; + if (usb_dev->speed != USB_SPEED_HIGH) dev_err(dev, "device not connected as high speed\n");