staging: ozwpan: Fixes crash due to invalid port aceess.
This patch fixes kernel crash issue, when we receive URB request
after de-enumerating device.
Signed-off-by: Rupesh Gujare <rupesh.gujare@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/ozwpan/ozhcd.c b/drivers/staging/ozwpan/ozhcd.c
index ed63868..d313a63 100644
--- a/drivers/staging/ozwpan/ozhcd.c
+++ b/drivers/staging/ozwpan/ozhcd.c
@@ -480,10 +480,14 @@
oz_free_urb_link(urbl);
return 0;
}
- if (in_dir)
+ if (in_dir && port->in_ep[ep_addr])
ep = port->in_ep[ep_addr];
- else
+ else if (!in_dir && port->out_ep[ep_addr])
ep = port->out_ep[ep_addr];
+ else {
+ err = -ENOMEM;
+ goto out;
+ }
/*For interrupt endpoint check for buffered data
* & complete urb
@@ -505,6 +509,7 @@
} else {
err = -EPIPE;
}
+out:
spin_unlock_bh(&port->ozhcd->hcd_lock);
if (err)
oz_free_urb_link(urbl);
