D53636.diff
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	diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
	--- a/sys/kern/kern_prot.c
	+++ b/sys/kern/kern_prot.c
	@@ -2792,10 +2792,6 @@

	MPASS(oldcred != NULL);
	PROC_LOCK_ASSERT(p, MA_OWNED);
	- KASSERT(newcred->cr_users == 0, ("%s: users %d not 0 on cred %p",
	- __func__, newcred->cr_users, newcred));
	- KASSERT(newcred->cr_ref == 1, ("%s: ref %ld not 1 on cred %p",
	- __func__, newcred->cr_ref, newcred));

	if (newcred->cr_ruidinfo != oldcred->cr_ruidinfo) {
	/*
	@@ -2821,8 +2817,10 @@
	__func__, oldcred->cr_users, oldcred));
	oldcred->cr_users--;
	mtx_unlock(&oldcred->cr_mtx);
	+ mtx_lock(&newcred->cr_mtx);
	+ newcred->cr_users++;
	+ mtx_unlock(&newcred->cr_mtx);
	p->p_ucred = newcred;
	- newcred->cr_users = 1;
	PROC_UPDATE_COW(p);
	if (newcred->cr_ruidinfo != oldcred->cr_ruidinfo)
	(void)chgproccnt(oldcred->cr_ruidinfo, -1, 0);