On Mon, Feb 12, 2018 at 08:58:28PM +0200, Eyal Birger wrote: > In setups like the following: > > Host A -- Host B > tun0 -- ipsec -- eth0 -- eth0 -- ipsec -- tun0 > > where tun0 are tunnel devices using dst_cache (ipip, ipip6, etc...). > > Unregistration of an underlying eth0 device leads to the following log > messages: > > unregister_netdevice: waiting for eth0 to become free. Usage count = 2 > > This is since xfrm dsts device references are not released upon device > unregistration when the xfrm dst is cached in a dst_cache. > > Several approaches for fixing this were discussed in [1]; this commit keeps > track of allocated xdsts and releases their device references on a netdev > unregister event. > > Signed-off-by: Eyal Birger <eyal.bir...@gmail.com>
Please add a 'Fixes' tag, it is not so clear what introduced this bug.
