diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index a9898e205f84..a477aaf4e940 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -6348,6 +6348,12 @@ static int smb2_get_info_sec(struct ksmbd_work *work,
 	if (!fp)
 		return -ENOENT;
 
+	if (le32_to_cpu(req->OutputBufferLength) < sizeof(struct smb_ntsd)) {
+		rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
+		ksmbd_fd_put(work, fp);
+		return -ENOSPC;
+	}
+
 	idmap = file_mnt_idmap(fp->filp);
 	inode = file_inode(fp->filp);
 	ksmbd_acls_fattr(&fattr, idmap, inode);