diff options
| author | Eric Dumazet <edumazet@google.com> | 2018-11-18 08:57:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-23 10:20:34 +0300 |
| commit | 4a80b1feaee77c9108765cf696c1bc2196393126 (patch) | |
| tree | 460a5a1afce7606a9fb4d3608afbc5d5f3dd33d9 /net | |
| parent | 5367cdf3e1587f1c58af0d5be98a1e9fb46eea68 (diff) | |
| download | linux-4a80b1feaee77c9108765cf696c1bc2196393126.tar.xz | |
net-gro: reset skb->pkt_type in napi_reuse_skb()
[ Upstream commit 33d9a2c72f086cbf1087b2fd2d1a15aa9df14a7f ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '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 15e3bb94156b..071c589f7994 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4756,6 +4756,10 @@ 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)); |