[Bug 257067] panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if_vlan.c:1185

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 09 Jul 2021 12:17:34 UTC

--- Comment #2 from Niels Bakker <niels=freebsd@bakker.net> ---
Test methodology: Unplug cable carrying the PPPoE session from the NTU, plug
into a switch so link stays up, wait.

Observed behaviour pre patch: same panic as ng0 gets torn down
Observed behaviour with above patch applied: normal operation continues after
mpd tears down the link, and the PPPoE link comes back up as soon as the cable
is plugged back into the NTU.

Success! Thanks, Alexandr Fedorov!

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