udp: prevent skbs lingering in tunnel socket queues

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[ Upstream commit e5aed006be ]

In case we find a socket with encapsulation enabled we should call
the encap_recv function even if just a udp header without payload is
available. The callbacks are responsible for correctly verifying and
dropping the packets.

Also, in case the header validation fails for geneve and vxlan we
shouldn't put the skb back into the socket queue, no one will pick
them up there.  Instead we can simply discard them in the respective
encap_recv functions.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Hannes Frederic Sowa 2016-05-19 15:58:33 +02:00 • committed by Greg Kroah-Hartman

parent 5b7ea922e1

commit ab1f253ddc

4 changed files with 7 additions and 17 deletions

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10

drivers/net/geneve.c

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10

drivers/net/vxlan.c

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2

net/ipv4/udp.c

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2

net/ipv6/udp.c

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