diff --git a/fs/dcache.c b/fs/dcache.c
index ea0485861d9377311a858359ab1183a1bae4e042..185d71a1c05bd40f54c9c04c69784b766f57717a 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1774,6 +1774,18 @@ static 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
@@ -1785,9 +1797,15 @@ static 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;
+
 	spin_lock(&parent->d_lock);
 	/*
 	 * don't need child lock because it is not subject
@@ -1797,7 +1815,7 @@ 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);
@@ -1810,11 +1828,17 @@ 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_DENTRY_CURSOR;
 		dentry->d_parent = dget(parent);
 	}
+out:
 	return dentry;
 }
 
diff --git a/fs/filescontrol.c b/fs/filescontrol.c
index 4ad500f4002579d9c83ffaaaf4ef01679bfea667..fdd557a246be1541494f9cfa38c3b2e243180132 100644
--- a/fs/filescontrol.c
+++ b/fs/filescontrol.c
@@ -27,7 +27,7 @@
 #include <linux/sched/signal.h>
 #include <linux/module.h>
 
-#define FILES_MAX ULONG_MAX
+#define FILES_MAX D_COUNT_MAX
 #define FILES_MAX_STR "max"
 
 static bool no_acct;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8f6704a3f596c6b1fadd6eb7cc56dceba5cd415a..243a0987ca2ba908883b72c91bde5d41531b65e7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -44,6 +44,9 @@
 #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;