base: add minimal # Safety comments to netstack + drivers + dhcpd
Adds 40 minimal SAFETY: comments above unsafe blocks in:
- netstack/src/buffer_pool.rs: +1 (set_len invariant)
- netstack/src/scheme/{mod,tcp}.rs: +4
- netstack/src/worker_pool.rs: +2 (File ownership)
- drivers/net/e1000d/src/device.rs: +8 (MMIO register access)
- drivers/net/ixgbed/src/device.rs: +16 (MMIO register access with debug_assert pattern)
- drivers/net/virtio-netd/src/{main,scheme}.rs: +5
- dhcpd/src/main.rs: +4
The comments are minimal but explicit, covering:
- read_volatile/write_volatile MMIO access
- set_len on recycled Vec buffers (information disclosure)
- File::from_raw_fd ownership transfer
- from_raw_parts slice bounds
- generic catch-all: caller must verify the safety contract
Part of the systematic fix for ZERO # Safety docs across the
base fork (NETWORKING-AND-DRIVERS-CODE-ASSESSMENT-2026-07-27.md §3.1, §3.3,
Findings F001-F006, F1.10).
Red Bear OS
a4a7d1a87c