diff --git a/security/landlock/fs.c b/security/landlock/fs.c
index 22d8b7c28074..7877a64cc6b8 100644
--- a/security/landlock/fs.c
+++ b/security/landlock/fs.c
@@ -1110,6 +1110,7 @@ static int current_check_refer_path(struct dentry *const old_dentry,
 	bool allow_parent1, allow_parent2;
 	access_mask_t access_request_parent1, access_request_parent2;
 	struct path mnt_dir;
+	struct dentry *old_parent;
 	layer_mask_t layer_masks_parent1[LANDLOCK_NUM_ACCESS_FS] = {},
 		     layer_masks_parent2[LANDLOCK_NUM_ACCESS_FS] = {};
 
@@ -1157,9 +1158,17 @@ static int current_check_refer_path(struct dentry *const old_dentry,
 	mnt_dir.mnt = new_dir->mnt;
 	mnt_dir.dentry = new_dir->mnt->mnt_root;
 
+	/*
+	 * old_dentry may be the root of the common mount point and
+	 * !IS_ROOT(old_dentry) at the same time (e.g. with open_tree() and
+	 * OPEN_TREE_CLONE).  We do not need to call dget(old_parent) because
+	 * we keep a reference to old_dentry.
+	 */
+	old_parent = (old_dentry == mnt_dir.dentry) ? old_dentry :
+						      old_dentry->d_parent;
+
 	/* new_dir->dentry is equal to new_dentry->d_parent */
-	allow_parent1 = collect_domain_accesses(dom, mnt_dir.dentry,
-						old_dentry->d_parent,
+	allow_parent1 = collect_domain_accesses(dom, mnt_dir.dentry, old_parent,
 						&layer_masks_parent1);
 	allow_parent2 = collect_domain_accesses(
 		dom, mnt_dir.dentry, new_dir->dentry, &layer_masks_parent2);