On Thu, Nov 11, 2021 at 05:52:38PM +0900, Shin'ichiro Kawasaki wrote:
> When BLKRESETZONE ioctl and data read race, the data read leaves stale
> page cache. The commit e5113505904e ("block: Discard page cache of zone
> reset target range") added page cache truncation to avoid stale page
> cache after the ioctl. However, the stale page cache still can be read
> during the reset zone operation for the ioctl. To avoid the stale page
> cache completely, hold invalidate_lock of the block device file mapping.
>
> Fixes: e5113505904e ("block: Discard page cache of zone reset target range")
> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # v5.15
> ---
Looks fine:
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
--
Ming
