diff --git a/sys/compat/linuxkpi/common/src/linux_idr.c b/sys/compat/linuxkpi/common/src/linux_idr.c
--- a/sys/compat/linuxkpi/common/src/linux_idr.c
+++ b/sys/compat/linuxkpi/common/src/linux_idr.c
@@ -178,6 +178,15 @@
 {
 	struct idr_layer *il, *iln;
 
+	/*
+	 * if this idr is empty/destroyed already, then return.
+	 * If we do not do this then the mutex will panic while
+	 * asserting that it is valid.
+	 */
+	if(!mtx_initialized(&idr->lock)) {
+		return;
+	}
+
 	idr_remove_all(idr);
 	mtx_lock(&idr->lock);
 	for (il = idr->free; il != NULL; il = iln) {
@@ -802,4 +811,5 @@
 {
 	idr_destroy(&ida->idr);
 	free(ida->free_bitmap, M_IDR);
+	ida->free_bitmap = NULL;
 }