Mikulas Patocka 4134455f2a dm writecache: fix writing beyond end of underlying device when shrinking
Do not attempt to write any data beyond the end of the underlying data
device while shrinking it.

The DM writecache device must be suspended when the underlying data
device is shrunk.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2021-02-09 17:09:02 -05:00
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