amd-s2idle: Drop group-writable /var/local database fallback#54
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The sleep database location previously fell back to /var/local/lib/amd-s2idle when /var/lib/amd-s2idle did not exist. On Debian-derived systems /var/local is group-staff writable (mode 2775), which would let a non-root user in the staff group pre-plant a poisoned data.db or a symlink there. The root systemd sleep hook would then open that attacker-controlled file. Always use /var/lib/amd-s2idle and create it with a restrictive 0o700 mode. The tool runs as root when it needs this path, so no fallback is required. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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