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| author | Eric Dumazet <edumazet@google.com> | 2018-11-17 21:57:02 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-17 21:59:18 -0800 |
| commit | 33d9a2c72f086cbf1087b2fd2d1a15aa9df14a7f (patch) | |
| tree | 344abb4aeb43f9c063507e747eb9c79e1777d39d | |
| parent | 5396527f8c002018bcfc9576b4c151a0695e7db4 (diff) | |
| download | linux-33d9a2c72f086cbf1087b2fd2d1a15aa9df14a7f.tar.bz2 | |
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>
| -rw-r--r-- | net/core/dev.c | 4 |
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)); |