# US-S5-1 — Yama + SLAB freelist random (defconfig)

**Track**: AXP Resurection Pro Magisk, unlocked sunfish.  
**On top of**: Stage1 + combo4 + FORTIFY + CVE clean-429 + hi-batch1–3.

## Why

High-offset KEEP CVEs are already on the ship pack. Remaining ge200 KEPT
items were **nf_tables** (`CVE-2023-3777`, `CVE-2024-26643`) — skipped on
purpose in batch3. Next attributable kernel depth without reopening CVE
quarantine:

| Knob | Before | After | Attribution |
|------|--------|-------|-------------|
| `CONFIG_SECURITY_YAMA` | unset (but `CONFIG_LSM` listed yama) | `=y` | Graphene/AXP LSM stack; ptrace scope |
| `CONFIG_SLAB_FREELIST_RANDOM` | unset | `=y` | Graphene/AH slab hardening companion to existing `SLAB_FREELIST_HARDENED` |

## Apply

```bash
bash vendor/sunfish-a16/patches/009-kernel-hardening/apply_uss5_1_defconfig.sh \
  kernel/google/msm-4.14
```

Wired into `scripts/009-bacon-axp-stage1-combo4-cve-hi-releasekeys.sh` after
Stage1+combo4+CVE apply.

## LAB verify

```text
zcat /proc/config.gz | grep CONFIG_SECURITY_YAMA=y
zcat /proc/config.gz | grep CONFIG_SLAB_FREELIST_RANDOM=y
cat /proc/sys/kernel/yama/ptrace_scope   # expect 1 (default)
pidof magiskd                            # still up
```

## Out of scope here

- `CVE-2022-49980` lock-scope port (still denylist)
- nf_tables high-offset CVEs
- Stage1 slab FAIL patches (`0010`/`0018` still reject on this tree)
- `hardened_malloc` / bootloader lock