path: root/net/ipv6/ip6_output.c
diff options
authorMichal Kubeček <>2016-01-11 07:50:30 +0100
committerDavid S. Miller <>2016-01-11 17:40:57 -0500
commit40ba330227ad00b8c0cdf2f425736ff9549cc423 (patch)
tree3718c7179545b58a97d956881860846fc85597a1 /net/ipv6/ip6_output.c
parent3de03596dfeee48bc803c1d1a6daf60a459929f3 (diff)
udp: disallow UFO for sockets with SO_NO_CHECK option
Commit acf8dd0a9d0b ("udp: only allow UFO for packets from SOCK_DGRAM sockets") disallows UFO for packets sent from raw sockets. We need to do the same also for SOCK_DGRAM sockets with SO_NO_CHECK options, even if for a bit different reason: while such socket would override the CHECKSUM_PARTIAL set by ip_ufo_append_data(), gso_size is still set and bad offloading flags warning is triggered in __skb_gso_segment(). In the IPv6 case, SO_NO_CHECK option is ignored but we need to disallow UFO for packets sent by sockets with UDP_NO_CHECK6_TX option. Signed-off-by: Michal Kubecek <> Tested-by: Shannon Nelson <> Acked-by: Hannes Frederic Sowa <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'net/ipv6/ip6_output.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e6a7bd15b9b7..6473889f1736 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1353,7 +1353,7 @@ emsgsize:
(skb && skb_is_gso(skb))) &&
(sk->sk_protocol == IPPROTO_UDP) &&
(rt->>features & NETIF_F_UFO) &&
- (sk->sk_type == SOCK_DGRAM)) {
+ (sk->sk_type == SOCK_DGRAM) && !udp_get_no_check6_tx(sk)) {
err = ip6_ufo_append_data(sk, queue, getfrag, from, length,
hh_len, fragheaderlen,
transhdrlen, mtu, flags, fl6);