gro: fix truesize underestimation

skb_gro_receive() doesnt update truesize properly when adding one skb to
frag_list.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index da0c97f2fab4..f3a530780753 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2906,7 +2906,7 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
         nskb->prev = p;
 
         nskb->data_len += p->len;
-        nskb->truesize += p->len;
+        nskb->truesize += p->truesize;
         nskb->len += p->len;
 
         *head = nskb;
@@ -2916,6 +2916,7 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
         p = nskb;
 
 merge:
+        p->truesize += skb->truesize - len;
         if (offset > headlen) {
                 unsigned int eat = offset - headlen;