diff --git a/fs/namespace.c b/fs/namespace.c
index f6879f282dae..ec3b16fedd9f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -5547,31 +5547,49 @@ static int grab_requested_root(struct mnt_namespace *ns, struct path *root)
 
 /* locks: namespace_shared */
 static int do_statmount(struct kstatmount *s, u64 mnt_id, u64 mnt_ns_id,
-			struct mnt_namespace *ns)
+                        struct file *mnt_file, struct mnt_namespace *ns)
 {
-	struct mount *m;
 	int err;
 
-	/* Has the namespace already been emptied? */
-	if (mnt_ns_id && mnt_ns_empty(ns))
-		return -ENOENT;
+	if (mnt_file) {
+		WARN_ON_ONCE(ns != NULL);
 
-	s->mnt = lookup_mnt_in_ns(mnt_id, ns);
-	if (!s->mnt)
-		return -ENOENT;
+		s->mnt = mnt_file->f_path.mnt;
+		ns = real_mount(s->mnt)->mnt_ns;
+		if (!ns)
+			/*
+			 * We can't set mount point and mnt_ns_id since we don't have a
+			 * ns for the mount. This can happen if the mount is unmounted
+			 * with MNT_DETACH.
+			 */
+			s->mask &= ~(STATMOUNT_MNT_POINT | STATMOUNT_MNT_NS_ID);
+	} else {
+		/* Has the namespace already been emptied? */
+		if (mnt_ns_id && mnt_ns_empty(ns))
+			return -ENOENT;
 
-	err = grab_requested_root(ns, &s->root);
-	if (err)
-		return err;
+		s->mnt = lookup_mnt_in_ns(mnt_id, ns);
+		if (!s->mnt)
+			return -ENOENT;
+	}
 
-	/*
-	 * Don't trigger audit denials. We just want to determine what
-	 * mounts to show users.
-	 */
-	m = real_mount(s->mnt);
-	if (!is_path_reachable(m, m->mnt.mnt_root, &s->root) &&
-	    !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN))
-		return -EPERM;
+	if (ns) {
+		err = grab_requested_root(ns, &s->root);
+		if (err)
+			return err;
+
+		if (!mnt_file) {
+			struct mount *m;
+			/*
+			 * Don't trigger audit denials. We just want to determine what
+			 * mounts to show users.
+			 */
+			m = real_mount(s->mnt);
+			if (!is_path_reachable(m, m->mnt.mnt_root, &s->root) &&
+			    !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN))
+				return -EPERM;
+		}
+	}
 
 	err = security_sb_statfs(s->mnt->mnt_root);
 	if (err)
@@ -5693,7 +5711,7 @@ static int prepare_kstatmount(struct kstatmount *ks, struct mnt_id_req *kreq,
 }
 
 static int copy_mnt_id_req(const struct mnt_id_req __user *req,
-			   struct mnt_id_req *kreq)
+			   struct mnt_id_req *kreq, unsigned int flags)
 {
 	int ret;
 	size_t usize;
@@ -5711,11 +5729,17 @@ static int copy_mnt_id_req(const struct mnt_id_req __user *req,
 	ret = copy_struct_from_user(kreq, sizeof(*kreq), req, usize);
 	if (ret)
 		return ret;
-	if (kreq->mnt_ns_fd != 0 && kreq->mnt_ns_id)
-		return -EINVAL;
-	/* The first valid unique mount id is MNT_UNIQUE_ID_OFFSET + 1. */
-	if (kreq->mnt_id <= MNT_UNIQUE_ID_OFFSET)
-		return -EINVAL;
+
+	if (flags & STATMOUNT_BY_FD) {
+		if (kreq->mnt_id || kreq->mnt_ns_id)
+			return -EINVAL;
+	} else {
+		if (kreq->mnt_ns_fd != 0 && kreq->mnt_ns_id)
+			return -EINVAL;
+		/* The first valid unique mount id is MNT_UNIQUE_ID_OFFSET + 1. */
+		if (kreq->mnt_id <= MNT_UNIQUE_ID_OFFSET)
+			return -EINVAL;
+	}
 	return 0;
 }
 
@@ -5762,25 +5786,33 @@ SYSCALL_DEFINE4(statmount, const struct mnt_id_req __user *, req,
 {
 	struct mnt_namespace *ns __free(mnt_ns_release) = NULL;
 	struct kstatmount *ks __free(kfree) = NULL;
+	struct file *mnt_file __free(fput) = NULL;
 	struct mnt_id_req kreq;
 	/* We currently support retrieval of 3 strings. */
 	size_t seq_size = 3 * PATH_MAX;
 	int ret;
 
-	if (flags)
+	if (flags & ~STATMOUNT_BY_FD)
 		return -EINVAL;
 
-	ret = copy_mnt_id_req(req, &kreq);
+	ret = copy_mnt_id_req(req, &kreq, flags);
 	if (ret)
 		return ret;
 
-	ns = grab_requested_mnt_ns(&kreq);
-	if (IS_ERR(ns))
-		return PTR_ERR(ns);
+	if (flags & STATMOUNT_BY_FD) {
+		mnt_file = fget_raw(kreq.mnt_fd);
+		if (!mnt_file)
+			return -EBADF;
+		/* do_statmount sets ns in case of STATMOUNT_BY_FD */
+	} else {
+		ns = grab_requested_mnt_ns(&kreq);
+		if (IS_ERR(ns))
+			return PTR_ERR(ns);
 
-	if (kreq.mnt_ns_id && (ns != current->nsproxy->mnt_ns) &&
-	    !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN))
-		return -EPERM;
+		if (kreq.mnt_ns_id && (ns != current->nsproxy->mnt_ns) &&
+		    !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN))
+			return -EPERM;
+	}
 
 	ks = kmalloc(sizeof(*ks), GFP_KERNEL_ACCOUNT);
 	if (!ks)
@@ -5792,7 +5824,7 @@ retry:
 		return ret;
 
 	scoped_guard(namespace_shared)
-		ret = do_statmount(ks, kreq.mnt_id, kreq.mnt_ns_id, ns);
+		ret = do_statmount(ks, kreq.mnt_id, kreq.mnt_ns_id, mnt_file, ns);
 
 	if (!ret)
 		ret = copy_statmount_to_user(ks);
@@ -5932,7 +5964,7 @@ SYSCALL_DEFINE4(listmount, const struct mnt_id_req __user *, req,
 	if (!access_ok(mnt_ids, nr_mnt_ids * sizeof(*mnt_ids)))
 		return -EFAULT;
 
-	ret = copy_mnt_id_req(req, &kreq);
+	ret = copy_mnt_id_req(req, &kreq, 0);
 	if (ret)
 		return ret;
 
diff --git a/include/uapi/linux/mount.h b/include/uapi/linux/mount.h
index 5d3f8c9e3a62..18c624405268 100644
--- a/include/uapi/linux/mount.h
+++ b/include/uapi/linux/mount.h
@@ -197,7 +197,10 @@ struct statmount {
  */
 struct mnt_id_req {
 	__u32 size;
-	__u32 mnt_ns_fd;
+	union {
+		__u32 mnt_ns_fd;
+		__u32 mnt_fd;
+	};
 	__u64 mnt_id;
 	__u64 param;
 	__u64 mnt_ns_id;
@@ -232,4 +235,9 @@ struct mnt_id_req {
 #define LSMT_ROOT		0xffffffffffffffff	/* root mount */
 #define LISTMOUNT_REVERSE	(1 << 0) /* List later mounts first */
 
+/*
+ * @flag bits for statmount(2)
+ */
+#define STATMOUNT_BY_FD		0x00000001U	/* want mountinfo for given fd */
+
 #endif /* _UAPI_LINUX_MOUNT_H */