July 2025 (2025-07) focused on hardening the Linux networking path in geerlingguy/linux. Delivered critical race-condition fixes to the QFQ network scheduler in net/sched, addressing concurrency-related stability issues under high load. Implemented proper locking and moved potentially sleeping operations out of atomic sections, preventing NULL dereferences, use-after-free, and may_sleep errors. The changes were implemented as two commits that specifically target the qfq_aggregate and qfq_delete_class paths, improving reliability of the scheduling subsystem. Result: higher network scheduling reliability, reduced crash vectors for deployments under heavy traffic. Demonstrated strong kernel-concurrency skills, C proficiency, and disciplined Git-based delivery.