72b3a2abdd
Pin the descriptor before mmap validation so guest descriptor reuse cannot redirect the eventual mapping. Apply the canonical guest creation mask when creating named objects, distinguishing new objects before setting permissions without changing the host process umask. Add regressions that reproduce both failures and document the remaining host requirements. Constraint: Guest umask must not mutate the process-wide host mask Confidence: high Scope-risk: narrow Tested: 17 targeted Linux runtime tests passed with zero skips; conventions and diff checks; Clang analyzer on three changed production translation units Not-tested: Full project build and suite, Windows runtime, console hardware and titles |
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