diff --git a/fs/dcache.c b/fs/dcache.c
index 4361940af3349c69a263af1d1e47d8d794afbca3..6c7ff1bbf19510f33f30f9c3a86e6852a24a23d2 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1682,6 +1682,18 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
 	return dentry;
 }
 
+static inline bool d_forbid_overflow(struct dentry *dentry)
+{
+	if (unlikely(d_count(dentry) >= D_COUNT_MAX)) {
+		shrink_dcache_parent(dentry);
+
+		if (d_count(dentry) >= D_COUNT_MAX)
+			return false;
+	}
+
+	return true;
+}
+
 /**
  * d_alloc	-	allocate a dcache entry
  * @parent: parent of entry to allocate
@@ -1693,9 +1705,15 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
  */
 struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 {
-	struct dentry *dentry = __d_alloc(parent->d_sb, name);
+	struct dentry *dentry = NULL;
+
+	if (unlikely(!d_forbid_overflow(parent)))
+		goto out;
+
+	dentry = __d_alloc(parent->d_sb, name);
 	if (!dentry)
-		return NULL;
+		goto out;
+
 	dentry->d_flags |= DCACHE_RCUACCESS;
 	spin_lock(&parent->d_lock);
 	/*
@@ -1706,7 +1724,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 	dentry->d_parent = parent;
 	list_add(&dentry->d_child, &parent->d_subdirs);
 	spin_unlock(&parent->d_lock);
-
+out:
 	return dentry;
 }
 EXPORT_SYMBOL(d_alloc);
@@ -1719,11 +1737,17 @@ EXPORT_SYMBOL(d_alloc_anon);
 
 struct dentry *d_alloc_cursor(struct dentry * parent)
 {
-	struct dentry *dentry = d_alloc_anon(parent->d_sb);
+	struct dentry *dentry = NULL;
+
+	if (unlikely(!d_forbid_overflow(parent)))
+		goto out;
+
+	dentry = d_alloc_anon(parent->d_sb);
 	if (dentry) {
 		dentry->d_flags |= DCACHE_RCUACCESS | DCACHE_DENTRY_CURSOR;
 		dentry->d_parent = dget(parent);
 	}
+out:
 	return dentry;
 }
 
diff --git a/fs/filescontrol.c b/fs/filescontrol.c
index 5fba9c376dd5eb06d3b053147537b3be1c5b6601..fbaeacbe2de886cde67cdaa271fea70496313ac5 100644
--- a/fs/filescontrol.c
+++ b/fs/filescontrol.c
@@ -26,7 +26,7 @@
 #include <linux/fdtable.h>
 #include <linux/sched/signal.h>
 
-#define FILES_MAX ULLONG_MAX
+#define FILES_MAX D_COUNT_MAX
 #define FILES_MAX_STR "max"
 
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 09d0646acf66fdc8abc5d616fd6cc92e2c9b7dfb..dfe4b0d98bdedc290c88d27efed8040b6bd816c4 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -42,6 +42,9 @@
 #include <asm/byteorder.h>
 #include <uapi/linux/fs.h>
 
+#define D_COUNT_MAX (INT_MAX / 2)
+
+
 struct backing_dev_info;
 struct bdi_writeback;
 struct bio;