diff --git a/io_uring/timeout.c b/io_uring/timeout.c
index b215b2fbddd0..9cc5776103fe 100644
--- a/io_uring/timeout.c
+++ b/io_uring/timeout.c
@@ -424,6 +424,8 @@ int io_timeout_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 
 	if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
 		return -EINVAL;
+	if (sqe->addr3 || sqe->__pad2[0])
+		return -EINVAL;
 	if (sqe->buf_index || sqe->len || sqe->splice_fd_in)
 		return -EINVAL;
 
@@ -496,6 +498,8 @@ static int __io_timeout_prep(struct io_kiocb *req,
 	unsigned flags;
 	u32 off = READ_ONCE(sqe->off);
 
+	if (sqe->addr3 || sqe->__pad2[0])
+		return -EINVAL;
 	if (sqe->buf_index || sqe->len != 1 || sqe->splice_fd_in)
 		return -EINVAL;
 	if (off && is_timeout_link)