diff options
| author | Eli Cooper <elicooper@gmx.com> | 2016-11-01 23:45:12 +0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:36 +0200 |
| commit | f5d252e8164ea45c46e2e3a7c498d8cc78b7c1f8 (patch) | |
| tree | cda489dd0e546e5029e166b772992b5bc6d0212c | |
| parent | eea081155f58317dd1b392d06fa729d80c4d0ea8 (diff) | |
ip6_tunnel: Clear IP6CB in ip6tunnel_xmit()
commit 23f4ffedb7d751c7e298732ba91ca75d224bc1a6 upstream.
skb->cb may contain data from previous layers. In the observed scenario,
the garbage data were misinterpreted as IP6CB(skb)->frag_max_size, so
that small packets sent through the tunnel are mistakenly fragmented.
This patch unconditionally clears the control buffer in ip6tunnel_xmit(),
which affects ip6_tunnel, ip6_udp_tunnel and ip6_gre. Currently none of
these tunnels set IP6CB(skb)->flags, otherwise it needs to be done earlier.
Cc: stable@vger.kernel.org
Signed-off-by: Eli Cooper <elicooper@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | include/net/ip6_tunnel.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h index 4da5de10d..b140c6079 100644 --- a/include/net/ip6_tunnel.h +++ b/include/net/ip6_tunnel.h @@ -75,6 +75,7 @@ static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev) int pkt_len, err; nf_reset(skb); + memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); pkt_len = skb->len; err = ip6_local_out(skb); |