path: root/net/ipv4/fou.c
diff options
authorHannes Frederic Sowa <>2016-01-07 14:28:39 +0100
committerDavid S. Miller <>2016-01-10 17:28:24 -0500
commit787d7ac308ff2279e4b2ea393ad4d990de486ef2 (patch)
tree30370eacf684b73d796ebfa081f4be5a99f87b96 /net/ipv4/fou.c
parent07b9b37c227cb8d88d478b4a9c5634fee514ede1 (diff)
udp: restrict offloads to one namespace
udp tunnel offloads tend to aggregate datagrams based on inner headers. gro engine gets notified by tunnel implementations about possible offloads. The match is solely based on the port number. Imagine a tunnel bound to port 53, the offloading will look into all DNS packets and tries to aggregate them based on the inner data found within. This could lead to data corruption and malformed DNS packets. While this patch minimizes the problem and helps an administrator to find the issue by querying ip tunnel/fou, a better way would be to match on the specific destination ip address so if a user space socket is bound to the same address it will conflict. Cc: Tom Herbert <> Cc: Eric Dumazet <> Signed-off-by: Hannes Frederic Sowa <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'net/ipv4/fou.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index bd903fe0f750..976f0dcf6991 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -498,7 +498,7 @@ static int fou_create(struct net *net, struct fou_cfg *cfg,
sk->sk_allocation = GFP_ATOMIC;
if (cfg-> == AF_INET) {
- err = udp_add_offload(&fou->udp_offloads);
+ err = udp_add_offload(net, &fou->udp_offloads);
if (err)
goto error;