staging: rtl8192u: Add null check in rtl8192_usb_initendpoints

There is an allocation for priv->rx_urb[16] has no null check,
which may lead to a null pointer dereference.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20201226080258.6576-1-dinghao.liu@zju.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 93676af..9fc4adc 100644 (file)
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -1608,6 +1608,8 @@ static short rtl8192_usb_initendpoints(struct net_device *dev)
                void *oldaddr, *newaddr;
 
                priv->rx_urb[16] = usb_alloc_urb(0, GFP_KERNEL);
+               if (!priv->rx_urb[16])
+                       return -ENOMEM;
                priv->oldaddr = kmalloc(16, GFP_KERNEL);
                if (!priv->oldaddr)
                        return -ENOMEM;