On Mon, Apr 12, 2021 at 12:23:33PM +0200, Jan Kara wrote:
> A code in iomap alloc may overblock block number when converting it to
> byte offset. Luckily this is mostly harmless as we will just use more
> expensive method of writing using unwritten extents even though we are
> writing beyond i_size.
>
> Fixes: 378f32bab371 ("ext4: introduce direct I/O write using iomap infrastructure")
> Signed-off-by: Jan Kara <jack@xxxxxxx>
This was part of the patch series "ext4: Fix data corruption when
extending DIO write races with buffered read" but which fixes an
unrelated problem. The patch series was dropped in favor of a
different approach, but it looks like this patch is still applicable,
so I've applied with a minor typo fix in the commit description.
- Ted
