[NETFILTER]: Fix HW checksum handling in nfnetlink_queue

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 249bddb28acd..f81fe8c52e99 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -371,6 +371,12 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
                 break;
         
         case NFQNL_COPY_PACKET:
+                if (entry->skb->ip_summed == CHECKSUM_HW &&
+                    (*errp = skb_checksum_help(entry->skb,
+                                               entry->info->outdev == NULL))) {
+                        spin_unlock_bh(&queue->lock);
+                        return NULL;
+                }
                 if (queue->copy_range == 0 
                     || queue->copy_range > entry->skb->len)
                         data_len = entry->skb->len;
@@ -636,7 +642,7 @@ nfqnl_mangle(void *data, int data_len, struct nfqnl_queue_entry *e)
         if (!skb_make_writable(&e->skb, data_len))
                 return -ENOMEM;
         memcpy(e->skb->data, data, data_len);
-
+        e->skb->ip_summed = CHECKSUM_NONE;
         return 0;
 }