inet: frags: fix defragmented packet's IP header for af_packet

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / ip_fragment.c

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index a50dc6d408d11c339b38f2436216c8568c4149cf..31f71b15cfbad7aa7cd959d4505644df3dd80b2d 100644 (file)
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -351,7 +351,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
        ihl = ip_hdrlen(skb);
 
        /* Determine the position of this fragment. */
-       end = offset + skb->len - ihl;
+       end = offset + skb->len - skb_network_offset(skb) - ihl;
        err = -EINVAL;
 
        /* Is this the final fragment? */
@@ -381,7 +381,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
                goto err;
 
        err = -ENOMEM;
-       if (!pskb_pull(skb, ihl))
+       if (!pskb_pull(skb, skb_network_offset(skb) + ihl))
                goto err;
 
        err = pskb_trim_rcsum(skb, end - offset);
@@ -641,6 +641,8 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
                iph->frag_off = 0;
        }
 
+       ip_send_check(iph);
+
        IP_INC_STATS_BH(net, IPSTATS_MIB_REASMOKS);
        qp->q.fragments = NULL;
        qp->q.fragments_tail = NULL;