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diff --git a/sys/fs/unionfs/union_subr.c b/sys/fs/unionfs/union_subr.c
--- a/sys/fs/unionfs/union_subr.c
+++ b/sys/fs/unionfs/union_subr.c
@@ -587,6 +587,7 @@
struct unionfs_node_status *unsp;
pid_t pid;
+ MPASS(td != NULL);
pid = td->td_proc->p_pid;
ASSERT_VOP_ELOCKED(UNIONFSTOV(unp), __func__);
@@ -612,6 +613,7 @@
struct unionfs_node_status *unsp;
pid_t pid;
+ MPASS(td != NULL);
pid = td->td_proc->p_pid;
KASSERT(NULL != unspp, ("%s: NULL status", __func__));
diff --git a/sys/fs/unionfs/union_vnops.c b/sys/fs/unionfs/union_vnops.c
--- a/sys/fs/unionfs/union_vnops.c
+++ b/sys/fs/unionfs/union_vnops.c
@@ -814,7 +814,7 @@
unp = VTOUNIONFS(vp);
lvp = unp->un_lowervp;
uvp = unp->un_uppervp;
- unsp = unionfs_find_node_status(unp, td);
+ unsp = (td != NULL) ? unionfs_find_node_status(unp, td) : NULL;
if (unsp == NULL ||
(unsp->uns_lower_opencnt <= 0 && unsp->uns_upper_opencnt <= 0)) {

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