From: frank.blaschka@xxxxxxxxxx Date: Thu, 13 Jan 2011 07:42:25 +0100 > --- a/drivers/s390/net/qeth_l3_main.c > +++ b/drivers/s390/net/qeth_l3_main.c > @@ -2998,7 +2998,9 @@ static inline void qeth_l3_hdr_csum(stru > */ > if (iph->protocol == IPPROTO_UDP) > hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_UDP; > - hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ; > + hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ | > + QETH_HDR_EXT_CSUM_HDR_REQ; > + iph->check = 0; > if (card->options.performance_stats) > card->perf_stats.tx_csum++; > } You may not change the packet header contents blindly like this. Otherwise unpredictable contents will be seen by tcpdump and any other code path which has a clone of this packet. Thus, you'll need to guard this change with something like: if (skb_header_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) { dev_kfree_skb(skb); goto tx_fail; } Please fix this and resubmit your two patches. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html