[LTP] cve-2026-31431: Add page cache corruption reproducer

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Thu, 30 Apr 2026 12:17:14 +0200, Andrea Cervesato wrote:
> cve-2026-31431: Add page cache corruption reproducer

Reviewed-by: LTP AI Reviewer <ltp-ai@noreply.github.com>

---
Note:

Our agent completed the review of the patch. The full review can be
found at: https://github.com/linux-test-project/ltp-agent/actions/runs/25160424399

The agent can sometimes produce false positives although often its
findings are genuine. If you find issues with the review, please
comment this email or ignore the suggestions.

Regards,
LTP AI Reviewer