diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index b2f16a7b696d..6584b5cddc28 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -3313,6 +3313,15 @@ SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
 		return rc;
 
 	if (indatalen) {
+		unsigned int len;
+
+		if (WARN_ON_ONCE(smb3_encryption_required(tcon) &&
+				 (check_add_overflow(total_len - 1,
+						     ALIGN(indatalen, 8), &len) ||
+				  len > MAX_CIFS_SMALL_BUFFER_SIZE))) {
+			cifs_small_buf_release(req);
+			return -EIO;
+		}
 		/*
 		 * indatalen is usually small at a couple of bytes max, so
 		 * just allocate through generic pool