[jdk17u-dev] RFR: 8298248: Limit sscanf output width in cgroup file parsers

[Goetz Lindenmaier]

I backport this for parity with 17.0.16-oracle.

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Commit messages:
 - Backport 3e041eb9093275bc658c02ae74cd39b4a74684ee

Changes: https://git.openjdk.org/jdk17u-dev/pull/3391/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3391&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298248
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3391.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3391/head:pull/3391

PR: https://git.openjdk.org/jdk17u-dev/pull/3391