40b9d1ab63
Recently syzkaller discovered the issue of disappearing lower
device (NETDEV_UNREGISTER) while the virtual device (like
macvlan) is still having it as a lower device. So it's just
a matter of time similar discovery will be made for IPvlan
device setup. So fixing it preemptively. Also while at it,
add a refcount tracker.
Fixes:
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.. | ||
ipvlan_core.c | ||
ipvlan_l3s.c | ||
ipvlan_main.c | ||
ipvlan.h | ||
ipvtap.c | ||
Makefile |