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CSI: fix potential state store corruptions #16256

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merged 2 commits into from
Feb 27, 2023
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@tgross tgross commented Feb 24, 2023

The CSIVolume struct has references to allocations that are "denormalized"; we don't store them on the CSIVolume struct but hydrate them on read. Tests detecting potential state store corruptions (ref #16257) found two locations where we're not copying the volume before denormalizing:

  • When garbage collecting CSI volume claims.
  • When checking if it's safe to force-deregister the volume.

There are no known user-visible problems associated with these bugs but both have the potential of mutating volume claims outside of a FSM transaction. This changeset also cleans up state mutations in some CSI tests so as to avoid having working tests cover up potential future bugs.

The `CSIVolume` struct has references to allocations that are "denormalized"; we
don't store them on the `CSIVolume` struct but hydrate them on read. Tests
detecting potential state store corruptions found two locations where we're not
copying the volume before denormalizing:

* When garbage collecting CSI volume claims.
* When checking if it's safe to force-deregister the volume.

There are no known user-visible problems associated with these bugs but both
have the potential of mutating volume claims outside of a FSM transaction. This
changeset also cleans up state mutations in some CSI tests so as to avoid having
working tests cover up potential future bugs.
@tgross tgross marked this pull request as ready for review February 24, 2023 20:25
@tgross tgross modified the milestones: 1.5.x, 1.5.0 Feb 24, 2023
@tgross tgross added backport/1.3.x backport to 1.3.x release line backport/1.4.x backport to 1.4.x release line labels Feb 24, 2023
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@jrasell jrasell left a comment

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LGTM!

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