diff --git a/mm/filemap.c b/mm/filemap.c
index c71e86c12418..cc86c5a127b9 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2617,7 +2617,7 @@ ssize_t filemap_read(struct kiocb *iocb, struct iov_iter *iter,
 	if (unlikely(!iov_iter_count(iter)))
 		return 0;
 
-	iov_iter_truncate(iter, inode->i_sb->s_maxbytes);
+	iov_iter_truncate(iter, inode->i_sb->s_maxbytes - iocb->ki_pos);
 	pagevec_init(&pvec);
 
 	do {