[dm-devel] [PATCH v6 1/5] block: Don't invalidate pagecache for invalid falloc modes

[Mike Snitzer]

On Sat, May 06 2023 at  2:29P -0400,
Sarthak Kukreti <sarthakkukreti at chromium.org> wrote:

> Only call truncate_bdev_range() if the fallocate mode is
> supported. This fixes a bug where data in the pagecache
> could be invalidated if the fallocate() was called on the
> block device with an invalid mode.
> 
> Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices")
> Cc: stable at vger.kernel.org
> Reported-by: Darrick J. Wong <djwong at kernel.org>
> Signed-off-by: Sarthak Kukreti <sarthakkukreti at chromium.org>

Reviewed-by: Mike Snitzer <snitzer at kernel.org>