diff -r d30e545c9a57 drivers/net/usb/smsc95xx.c
--- a/drivers/net/usb/smsc95xx.c	Mon Apr 22 16:19:09 2013 +0200
+++ b/drivers/net/usb/smsc95xx.c	Mon Apr 22 16:19:46 2013 +0200
@@ -1714,7 +1714,13 @@
 
 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
 {
-	skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
+	/*
+	 * Use bytewise access to avoid alignment issues on packets that have none
+	 * aligned sizes
+	 */
+	char *tail = skb_tail_pointer(skb);
+	skb->csum = (*(tail - 2) << 8) | *(tail - 1);
+
 	skb->ip_summed = CHECKSUM_COMPLETE;
 	skb_trim(skb, skb->len - 2);
 }