From 5414c840323173a7f7131c07efdd436437274a8b Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Mon, 29 Sep 2014 10:34:29 -0700
Subject: [PATCH] gro: fix aggregation for skb using frag_list
In commit 7e5dbdad13a6 ("net: gro: allow to build full sized skb")
I added a regression for linear skb that traditionally force GRO
to use the frag_list fallback.
Erez Shitrit found that at most two segments were aggregated and
the "if (skb_gro_len(p) != pinfo->gso_size)" test was failing.
This is because pinfo at this spot still points to the last skb in the
chain, instead of the first one, where we find the correct gso_size
information.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 7e5dbdad13a6 ("net: gro: allow to build full sized skb")
Reported-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/skbuff.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index da1378a3e2c72..8d289697cc7ad 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3152,6 +3152,9 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE_STOLEN_HEAD;
goto done;
}
+ /* switch back to head shinfo */
+ pinfo = skb_shinfo(p);
+
if (pinfo->frag_list)
goto merge;
if (skb_gro_len(p) != pinfo->gso_size)
--
2.39.5