[jdk17u-dev] RFR: 8287073: NPE from CgroupV2Subsystem.getInstance()

[Severin Gehwolf]

Clean backport. Issue present in 17u too and low risk fix. Regression test in JDK-8287663 which I intend to backport too.

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Commit messages:
 - Backport 744b822ab194a0f7ef4e7a4053be32c6a0889efc

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/456/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=456&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287073
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/456.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/456/head:pull/456

PR: https://git.openjdk.java.net/jdk17u-dev/pull/456