Re: [PATCH v6] iomap: support tail packing inline read

Matthew Wilcox
2021-07-23T15:05:55Z

On Thu, Jul 22, 2021 at 07:39:47AM +0200, Christoph Hellwig wrote:
> @@ -675,7 +676,7 @@ static size_t iomap_write_end_inline(struct inode *inode, struct page *page,
>
> flush_dcache_page(page);
> addr = kmap_atomic(page);
> - memcpy(iomap->inline_data + pos, addr + pos, copied);
> + memcpy(iomap_inline_buf(iomap, pos), addr + pos, copied);

This is wrong; pos can be > PAGE_SIZE, so this needs to be
addr + offset_in_page(pos).