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| author | Daniel Borkmann <dborkman@redhat.com> | 2014-08-07 22:22:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-07 16:02:58 -0700 |
| commit | 4e48ed883c72e78c5a910f8831ffe90c9b18f0ec (patch) | |
| tree | fa600b832729d7a69ecf42af27eca5e7ec396135 /net/netlink | |
| parent | 6f2c9bd85eee30fd77e6c65c097769ad0d6d7352 (diff) | |
| download | lwn-4e48ed883c72e78c5a910f8831ffe90c9b18f0ec.tar.gz lwn-4e48ed883c72e78c5a910f8831ffe90c9b18f0ec.zip | |
netlink: reset network header before passing to taps
netlink doesn't set any network header offset thus when the skb is
being passed to tap devices via dev_queue_xmit_nit(), it emits klog
false positives due to it being unset like:
...
[ 124.990397] protocol 0000 is buggy, dev nlmon0
[ 124.990411] protocol 0000 is buggy, dev nlmon0
...
So just reset the network header before passing to the device; for
packet sockets that just means nothing will change - mac and net
offset hold the same value just as before.
Reported-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
| -rw-r--r-- | net/netlink/af_netlink.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index a324b4b34c90..2e152e5f2186 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -213,7 +213,7 @@ static int __netlink_deliver_tap_skb(struct sk_buff *skb, nskb->protocol = htons((u16) sk->sk_protocol); nskb->pkt_type = netlink_is_kernel(sk) ? PACKET_KERNEL : PACKET_USER; - + skb_reset_network_header(nskb); ret = dev_queue_xmit(nskb); if (unlikely(ret > 0)) ret = net_xmit_errno(ret); |