8374343: Fix SIGSEGV when lib/modules is unreadable

[bulasevich]

This pull request contains a backport of commit 48846744 from the openjdk/jdk repository.

The simple change fixes SIGSEGV crash during startup if the runtime image (lib/modules) exists but is unreadable.

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Progress

• JDK-8374343 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8374343: Fix SIGSEGV when lib/modules is unreadable (Bug - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/427/head:pull/427
$ git checkout pull/427

Update a local copy of the PR:
$ git checkout pull/427
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/427/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 427

View PR using the GUI difftool:
$ git pr show -t 427

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/427.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back bulasevich! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @bulasevich This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[bulasevich]

/approval

[mlbridge]

Webrevs

• 00: Full (ce214bf1)

[openjdk]

@bulasevich usage: /approval [<id>] (request|cancel) [<text>]

[bulasevich]

/approval This simple change fixes a specific startup crash. The backport is clean and small, with low risk.

[openjdk]

@bulasevich usage: /approval [<id>] (request|cancel) [<text>]

[bulasevich]

/approval request This simple change fixes a specific startup crash. The backport is clean and small, with low risk.

[openjdk]

@bulasevich
8374343: The approval request has been created successfully.