add enforce to prevent integer overflow

[kevinbackhouse]

fixes: #3511

[kevinbackhouse]

@mergify backport 0.28.x

[mergify]

backport 0.28.x

✅ Backports have been created

Details

• #3516 add enforce to prevent integer overflow (backport #3512) has been created for branch 0.28.x but encountered conflicts

Cherry-pick of fe0d015 has failed:

On branch mergify/bp/0.28.x/pr-3512
Your branch is up to date with 'origin/0.28.x'.

You are currently cherry-picking commit fe0d0154.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   test/data/issue_3511_poc.eps
	new file:   tests/bugfixes/github/test_issue_3511.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/regression_tests/test_regression_allfiles.py

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[Copilot]

Pull request overview

This PR adds integer overflow protection when processing native preview data in EPS files. The change prevents potential crashes or undefined behavior when the data size is less than the required header offset.

Changes:

• Added validation check to prevent integer overflow in preview data processing
• Added regression test for issue 3511 with malformed EPS file
• Excluded the test file from general regression testing

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/preview.cpp	Added enforcement check to validate data size before offset calculation
tests/bugfixes/github/test_issue_3511.py	Added test case to verify the fix handles malformed EPS files correctly
tests/regression_tests/test_regression_allfiles.py	Excluded the test file from general regression tests
test/data/issue_3511_poc.eps	Added proof-of-concept EPS file that triggers the overflow condition

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