D47992.diff
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	diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
	--- a/sys/kern/kern_jail.c
	+++ b/sys/kern/kern_jail.c
	@@ -1687,9 +1687,18 @@
	sizeof(pr->pr_osrelease));

	#ifdef VIMAGE
	- /* Allocate a new vnet if specified. */
	- pr->pr_vnet = (pr_flags & PR_VNET)
	- ? vnet_alloc() : ppr->pr_vnet;
	+ /*
	+ * Allocate a new vnet if specified.
	+ *
	+ * Set PR_VNET now if so, so that the vnet is disposed of
	+ * properly when the jail is destroyed.
	+ */
	+ if (pr_flags & PR_VNET) {
	+ pr->pr_flags \|= PR_VNET;
	+ pr->pr_vnet = vnet_alloc();
	+ } else {
	+ pr->pr_vnet = ppr->pr_vnet;
	+ }
	#endif
	/*
	* Allocate a dedicated cpuset for each jail.
	@@ -3207,9 +3216,12 @@
	* Removing a prison frees references
	* from its parent.
	*/
	+ ppr = pr->pr_parent;
	+ pr->pr_parent = NULL;
	mtx_unlock(&pr->pr_mtx);
	+
	+ pr = ppr;
	flags &= ~PD_LOCKED;
	- pr = pr->pr_parent;
	flags \|= PD_DEREF \| PD_DEUREF;
	continue;
	}
	@@ -3236,7 +3248,7 @@
	*/
	TAILQ_FOREACH_SAFE(rpr, &freeprison, pr_list, tpr) {
	#ifdef VIMAGE
	- if (rpr->pr_vnet != rpr->pr_parent->pr_vnet)
	+ if (rpr->pr_flags & PR_VNET)
	vnet_destroy(rpr->pr_vnet);
	#endif
	if (rpr->pr_root != NULL)