D56288.diff
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	diff --git a/sys/net/if.c b/sys/net/if.c
	--- a/sys/net/if.c
	+++ b/sys/net/if.c
	@@ -479,6 +479,8 @@

	i = 0;

	+ /* The lock has already been aquired in vnet_destroy() */
	+ sx_assert(&ifnet_detach_sxlock, SX_XLOCKED);
	/*
	* We need to protect our access to the V_ifnet tailq. Ordinarily we'd
	* enter NET_EPOCH, but that's not possible, because if_vmove() calls
	@@ -507,9 +509,7 @@
	IFNET_WUNLOCK();

	for (int j = 0; j < i; j++) {
	- sx_xlock(&ifnet_detach_sxlock);
	if_vmove(pending[j], pending[j]->if_home_vnet);
	- sx_xunlock(&ifnet_detach_sxlock);
	}

	free(pending, M_IFNET);