[jdk21u] RFR: 8306561: Possible out of bounds access in print_pointer_information

[Christoph Langer]

Hi all,

This pull request contains a backport of [JDK-8306561](https://bugs.openjdk.org/browse/JDK-8306561), commit [d6ce62eb](https://github.com/openjdk/jdk/commit/d6ce62ebc01eb483b486af886d9b79f60ff87de1) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

It also contains a backport of [JDK-8319542](https://bugs.openjdk.org/browse/JDK-8319542) inline.


Thanks!

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Commit messages:
 - JDK-8319542
 - Backport d6ce62ebc01eb483b486af886d9b79f60ff87de1

Changes: https://git.openjdk.org/jdk21u/pull/379/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=379&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306561
  Stats: 5 lines in 2 files changed: 1 ins; 3 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u/pull/379.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/379/head:pull/379

PR: https://git.openjdk.org/jdk21u/pull/379