From: Ilya Dryomov <idryomov@gmail.com>
Date: Fri, 21 May 2021 13:27:31 +0000 (+0200)
Subject: librbd/cache/pwl/ssd: ensure first_{valid,free}_entry aren't bogus
X-Git-Tag: v16.2.7~50^2~19
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=6f6a75a2f925cb1c69b93fec54b85b387e8f7a54;p=ceph.git

librbd/cache/pwl/ssd: ensure first_{valid,free}_entry aren't bogus

Ensure first_{valid,free}_entry are inside the expected range when
scheduling root updates and decoding the root on recovery.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
(cherry picked from commit b46f81fbb22e67548e9825756da625d8e9017d10)
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