diff options
| author | Ben Hutchings <ben@decadent.org.uk> | 2014-10-30 18:27:17 +0000 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-11-13 19:01:51 +0100 |
| commit | 30ab1cf8b31dc6a680ac6443a34d02d9edb9a589 (patch) | |
| tree | 192f78a68afad670e5a498ccc541dd47c08acc98 /drivers/net/tun.c | |
| parent | d84c3df2a5f2e6847a15c5d7fbdfba86346e67ab (diff) | |
drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets
[ Upstream commit 5188cd44c55db3e92cd9e77a40b5baa7ed4340f7 ]
UFO is now disabled on all drivers that work with virtio net headers,
but userland may try to send UFO/IPv6 packets anyway. Instead of
sending with ID=0, we should select identifiers on their behalf (as we
used to).
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 916e4cf46d02 ("ipv6: reuse ip6_frag_id from ip6_ufo_append_data")
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 10636cbd3807..495830a8ee28 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -65,6 +65,7 @@ #include <linux/nsproxy.h> #include <linux/virtio_net.h> #include <linux/rcupdate.h> +#include <net/ipv6.h> #include <net/net_namespace.h> #include <net/netns/generic.h> #include <net/rtnetlink.h> @@ -1103,6 +1104,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, break; } + skb_reset_network_header(skb); + if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) { pr_debug("GSO!\n"); switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { @@ -1114,6 +1117,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, break; case VIRTIO_NET_HDR_GSO_UDP: skb_shinfo(skb)->gso_type = SKB_GSO_UDP; + if (skb->protocol == htons(ETH_P_IPV6)) + ipv6_proxy_select_ident(skb); break; default: tun->dev->stats.rx_frame_errors++; @@ -1143,7 +1148,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG; } - skb_reset_network_header(skb); skb_probe_transport_header(skb, 0); rxhash = skb_get_rxhash(skb); |