Re: [PATCH v3] exfat: validate cached iomaps during buffered writes and writeback

[Namjae Jeon]

On Thu, Jul 2, 2026 at 11:45 AM Chi Zhiling <chizhiling@xxxxxxx> wrote:
>
> From: Chi Zhiling <chizhiling@xxxxxxxxxx>
>
> Writeback does not hold i_rwsem and can race with truncate or other
> operations that change the file's block mapping. This may leave cached
> iomaps stale, causing writeback to write data to blocks that no longer
> belong to the file.
Do you have an actual reproducer or an observed corruption for this ?
Thanks.