1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 2160d5d009cb..3815e8505ed2 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -456,7 +456,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
         skb_network_header(head)[nhoff] = skb_transport_header(head)[0];
         memmove(head->head + sizeof(struct frag_hdr), head->head,
                 (head->data - head->head) - sizeof(struct frag_hdr));
-        head->mac_header += sizeof(struct frag_hdr);
+        if (skb_mac_header_was_set(head))
+                head->mac_header += sizeof(struct frag_hdr);
         head->network_header += sizeof(struct frag_hdr);
 
         skb_reset_transport_header(head);