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authorEric Dumazet <edumazet@google.com>2018-11-17 21:57:02 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-17 21:59:18 -0800
commit33d9a2c72f086cbf1087b2fd2d1a15aa9df14a7f (patch)
tree344abb4aeb43f9c063507e747eb9c79e1777d39d /net
parent5396527f8c002018bcfc9576b4c151a0695e7db4 (diff)
net-gro: reset skb->pkt_type in napi_reuse_skb()
eth_type_trans() assumes initial value for skb->pkt_type is PACKET_HOST. This is indeed the value right after a fresh skb allocation. However, it is possible that GRO merged a packet with a different value (like PACKET_OTHERHOST in case macvlan is used), so we need to make sure napi->skb will have pkt_type set back to PACKET_HOST. Otherwise, valid packets might be dropped by the stack because their pkt_type is not PACKET_HOST. napi_reuse_skb() was added in commit 96e93eab2033 ("gro: Add internal interfaces for VLAN"), but this bug always has been there. Fixes: 96e93eab2033 ("gro: Add internal interfaces for VLAN") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 0ffcbdd55fa9..066aa902d85c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5655,6 +5655,10 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
skb->vlan_tci = 0;
skb->dev = napi->dev;
skb->skb_iif = 0;
+
+ /* eth_type_trans() assumes pkt_type is PACKET_HOST */
+ skb->pkt_type = PACKET_HOST;
+
skb->encapsulation = 0;
skb_shinfo(skb)->gso_type = 0;
skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));