--- zzzz-none-000/linux-3.10.107/drivers/isdn/mISDN/dsp_core.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/isdn/mISDN/dsp_core.c	2021-02-04 17:41:59.000000000 +0000
@@ -288,8 +288,10 @@
 	u8 *data;
 	int len;
 
-	if (skb->len < sizeof(int))
+	if (skb->len < sizeof(int)) {
 		printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__);
+		return -EINVAL;
+	}
 	cont = *((int *)skb->data);
 	len = skb->len - sizeof(int);
 	data = skb->data + sizeof(int);
@@ -458,7 +460,7 @@
 		}
 		if (dsp_debug & DEBUG_DSP_CORE)
 			printk(KERN_DEBUG "%s: enable mixing of "
-			       "tx-data with conf mebers\n", __func__);
+			       "tx-data with conf members\n", __func__);
 		dsp->tx_mix = 1;
 		dsp_cmx_hardware(dsp->conf, dsp);
 		dsp_rx_off(dsp);
@@ -472,7 +474,7 @@
 		}
 		if (dsp_debug & DEBUG_DSP_CORE)
 			printk(KERN_DEBUG "%s: disable mixing of "
-			       "tx-data with conf mebers\n", __func__);
+			       "tx-data with conf members\n", __func__);
 		dsp->tx_mix = 0;
 		dsp_cmx_hardware(dsp->conf, dsp);
 		dsp_rx_off(dsp);