Le 02/09/2016 à 06:53, Cong Wang a écrit :

We never read or change netns id in hardirq context,
the only place we read netns id in softirq context
is in vxlan_xmit(). So, it should be enough to just
disable BH.

Are you sure? Did you audit all part of the code?
peernet2id() is called from netlink core system (do_one_broadcast()). Are you
sure that no driver call this function from an hard irq context?

I think that NETLINK_LISTEN_ALL_NSID is largely untested, so it will be hard to
detect a bug introduced in this feature.