Mike Snitzer 2e80638cee dm cache metadata: fail operations if fail_io mode has been established ...

commit 10add84e27 upstream.

Otherwise it is possible to trigger crashes due to the metadata being
inaccessible yet these methods don't safely account for that possibility
without these checks.

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-05-25 15:46:12 +02:00

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