On Tue, May 14, 2019 at 10:10 AM Mark Johnston <markj_at_freebsd.org> wrote: > > Hi, > > I hit the following panic last night on a non-INVARIANTS kernel at > r347549. The workload involves running a number of bhyve VMs with > frequent restarts, during which a tap interface is destroyed and > recreated. I'm a bit short on time to debug this today, so while I > retry with INVARIANTS on I thought I'd also report the issue in case > anyone else is seeing it. > > The panic occurred because the ifnet's softc field is NULL. Ah, foo. I'll have to re-examine the ioctl/destroy race... tun_destroy grabs the ioctl sx and kills off the if_softc, but it can not and should not do this before if_detach or else things go wrong because it's still a part of the bridge.Received on Tue May 14 2019 - 13:35:23 UTC
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