diff --git a/mm/filemap.c b/mm/filemap.c
index b48ec6fc8f4b91072e872b320407817d9eba24bf..c8863a76d531e3c4f02931cc5c38e61031862551 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2554,7 +2554,7 @@ ssize_t generic_file_buffered_read(struct kiocb *iocb,
 	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);
 
 	if (nr_pages > ARRAY_SIZE(pages_onstack))
 		pages = kmalloc_array(nr_pages, sizeof(void *), GFP_KERNEL);