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SKELETONKEY/Makefile
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leviathan ea1744e6f0 tests: detect() unit harness with mocked ctx->host 
Adds tests/test_detect.c — a standalone harness that constructs
synthetic struct skeletonkey_host fingerprints (vulnerable / patched /
specific-gate-closed) and asserts each migrated module's detect()
returns the expected verdict. First real test coverage for the corpus;
catches regressions in the host-fingerprint-consuming logic.

Initial coverage — 8 deterministic cases across the 4 modules that
already consume ctx->host:
- dirtydecrypt: 3 cases verifying 'kernel < 7.0 -> predates the bug'
  short-circuit on synthetic 6.12 / 6.14 / 6.8 hosts.
- fragnesia: unprivileged_userns_allowed=false -> PRECOND_FAIL.
- pack2theroot: is_debian_family=false -> PRECOND_FAIL.
- pack2theroot: has_dbus_system=false -> PRECOND_FAIL.
- overlayfs: distro=debian / distro=fedora -> 'not Ubuntu' -> OK.

Coverage grows automatically as more modules migrate to ctx->host
(task #12 below adds them). Each new module that consults the host
fingerprint can have its precondition gates tested with a one-line
EXPECT_DETECT call against a pre-built fingerprint.

Wiring:
- Makefile: new MODULE_OBJS var consolidates the module .o list so
  both the main binary and the test binary can share it without
  duplication. New TEST_BIN := skeletonkey-test target. 'make test'
  builds and runs the suite.
- .github/workflows/build.yml: install libglib2.0-dev + pkg-config so
  pack2theroot builds with GLib in CI (was previously stub-compiling).
  New 'tests — detect() unit suite' step runs 'make test' as a
  non-root user so modules' 'already root' gates don't short-circuit
  before the synthetic host checks fire.
- Test harness compiles cross-platform but assertions are #ifdef
  __linux__ guarded (on non-Linux all module detect() bodies stub-out
  to PRECOND_FAIL, making assertions tautological); macOS dev build
  reports 'skipped'.

Module change:
- pack2theroot p2tr_detect now consults ctx->host->is_root (with a
  geteuid() fallback when ctx->host is null) instead of calling
  geteuid() directly. Production behaviour is identical
  (host->is_root is populated from geteuid() at startup); tests can
  now construct non-root fingerprints regardless of the test
  process's actual euid. Exposed a real consistency issue worth
  fixing.

Verified in docker as non-root: 8/8 pass on Linux. macOS reports
'skipped' as designed.
2026-05-22 23:32:12 -04:00

238 lines
8.9 KiB
Makefile
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# SKELETONKEY — top-level Makefile (Phase 1)
#
# Builds one binary `skeletonkey` linked from:
# - core/ module interface + registry
# - modules/<f>/ one family per subdir, contributes objects to the
# final binary
# - skeletonkey.c top-level dispatcher
#
# Each family is currently flat (Phase 1 keeps copy_fail_family's
# absorbed DIRTYFAIL source in modules/copy_fail_family/src/).
# Future families register the same way: add their register_* call to
# skeletonkey.c's main() and add their src dir to MODULE_DIRS below.
CC ?= gcc
CFLAGS ?= -O2 -Wall -Wextra -Wno-unused-parameter -Wno-pointer-arith \
-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
LDFLAGS ?=
BUILD := build
BIN := skeletonkey
# core/
CORE_SRCS := core/registry.c core/kernel_range.c core/offsets.c core/finisher.c core/host.c
CORE_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CORE_SRCS))
# Family: copy_fail_family
# All DIRTYFAIL .c files contribute; skeletonkey_modules.c is the bridge.
CFF_DIR := modules/copy_fail_family
CFF_SRCS := $(wildcard $(CFF_DIR)/src/*.c) $(CFF_DIR)/skeletonkey_modules.c
# Filter out the original dirtyfail.c (its main() conflicts with skeletonkey.c's main).
CFF_SRCS := $(filter-out $(CFF_DIR)/src/dirtyfail.c, $(CFF_SRCS))
CFF_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CFF_SRCS))
# Family: dirty_pipe (single-CVE family, no shared infrastructure)
DP_DIR := modules/dirty_pipe_cve_2022_0847
DP_SRCS := $(DP_DIR)/skeletonkey_modules.c
DP_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(DP_SRCS))
# Family: entrybleed (single-CVE family, x86_64 only)
EB_DIR := modules/entrybleed_cve_2023_0458
EB_SRCS := $(EB_DIR)/skeletonkey_modules.c
EB_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(EB_SRCS))
# Family: pwnkit (userspace polkit bug, not kernel)
PK_DIR := modules/pwnkit_cve_2021_4034
PK_SRCS := $(PK_DIR)/skeletonkey_modules.c
PK_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(PK_SRCS))
# Family: nf_tables (CVE-2024-1086)
NFT_DIR := modules/nf_tables_cve_2024_1086
NFT_SRCS := $(NFT_DIR)/skeletonkey_modules.c
NFT_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NFT_SRCS))
# Family: overlayfs (CVE-2021-3493)
OVL_DIR := modules/overlayfs_cve_2021_3493
OVL_SRCS := $(OVL_DIR)/skeletonkey_modules.c
OVL_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(OVL_SRCS))
# Family: cls_route4 (CVE-2022-2588)
CR4_DIR := modules/cls_route4_cve_2022_2588
CR4_SRCS := $(CR4_DIR)/skeletonkey_modules.c
CR4_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CR4_SRCS))
# Family: dirty_cow (CVE-2016-5195) — requires -pthread
DCOW_DIR := modules/dirty_cow_cve_2016_5195
DCOW_SRCS := $(DCOW_DIR)/skeletonkey_modules.c
DCOW_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(DCOW_SRCS))
# Family: ptrace_traceme (CVE-2019-13272)
PTM_DIR := modules/ptrace_traceme_cve_2019_13272
PTM_SRCS := $(PTM_DIR)/skeletonkey_modules.c
PTM_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(PTM_SRCS))
# Family: netfilter_xtcompat (CVE-2021-22555)
NXC_DIR := modules/netfilter_xtcompat_cve_2021_22555
NXC_SRCS := $(NXC_DIR)/skeletonkey_modules.c
NXC_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NXC_SRCS))
# Family: af_packet (CVE-2017-7308)
AFP_DIR := modules/af_packet_cve_2017_7308
AFP_SRCS := $(AFP_DIR)/skeletonkey_modules.c
AFP_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(AFP_SRCS))
# Family: fuse_legacy (CVE-2022-0185)
FUL_DIR := modules/fuse_legacy_cve_2022_0185
FUL_SRCS := $(FUL_DIR)/skeletonkey_modules.c
FUL_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(FUL_SRCS))
# Family: stackrot (CVE-2023-3269)
STR_DIR := modules/stackrot_cve_2023_3269
STR_SRCS := $(STR_DIR)/skeletonkey_modules.c
STR_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(STR_SRCS))
# Family: af_packet2 (CVE-2020-14386) — same family as af_packet
AFP2_DIR := modules/af_packet2_cve_2020_14386
AFP2_SRCS := $(AFP2_DIR)/skeletonkey_modules.c
AFP2_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(AFP2_SRCS))
# Family: cgroup_release_agent (CVE-2022-0492)
CRA_DIR := modules/cgroup_release_agent_cve_2022_0492
CRA_SRCS := $(CRA_DIR)/skeletonkey_modules.c
CRA_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CRA_SRCS))
# Family: overlayfs_setuid (CVE-2023-0386) — joins overlayfs family
OSU_DIR := modules/overlayfs_setuid_cve_2023_0386
OSU_SRCS := $(OSU_DIR)/skeletonkey_modules.c
OSU_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(OSU_SRCS))
# Family: nft_set_uaf (CVE-2023-32233)
NSU_DIR := modules/nft_set_uaf_cve_2023_32233
NSU_SRCS := $(NSU_DIR)/skeletonkey_modules.c
NSU_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NSU_SRCS))
# Family: af_unix_gc (CVE-2023-4622)
AUG_DIR := modules/af_unix_gc_cve_2023_4622
AUG_SRCS := $(AUG_DIR)/skeletonkey_modules.c
AUG_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(AUG_SRCS))
# Family: nft_fwd_dup (CVE-2022-25636)
NFD_DIR := modules/nft_fwd_dup_cve_2022_25636
NFD_SRCS := $(NFD_DIR)/skeletonkey_modules.c
NFD_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NFD_SRCS))
# Family: nft_payload (CVE-2023-0179)
NPL_DIR := modules/nft_payload_cve_2023_0179
NPL_SRCS := $(NPL_DIR)/skeletonkey_modules.c
NPL_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NPL_SRCS))
SAM_DIR := modules/sudo_samedit_cve_2021_3156
SAM_SRCS := $(SAM_DIR)/skeletonkey_modules.c
SAM_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(SAM_SRCS))
SEQ_DIR := modules/sequoia_cve_2021_33909
SEQ_SRCS := $(SEQ_DIR)/skeletonkey_modules.c
SEQ_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(SEQ_SRCS))
SUE_DIR := modules/sudoedit_editor_cve_2023_22809
SUE_SRCS := $(SUE_DIR)/skeletonkey_modules.c
SUE_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(SUE_SRCS))
VMW_DIR := modules/vmwgfx_cve_2023_2008
VMW_SRCS := $(VMW_DIR)/skeletonkey_modules.c
VMW_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(VMW_SRCS))
# Family: dirtydecrypt (CVE-2026-31635) — rxgk page-cache write
DDC_DIR := modules/dirtydecrypt_cve_2026_31635
DDC_SRCS := $(DDC_DIR)/skeletonkey_modules.c
DDC_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(DDC_SRCS))
# Family: fragnesia (CVE-2026-46300) — XFRM ESP-in-TCP page-cache write
FGN_DIR := modules/fragnesia_cve_2026_46300
FGN_SRCS := $(FGN_DIR)/skeletonkey_modules.c
FGN_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(FGN_SRCS))
# Family: pack2theroot (CVE-2026-41651) — PackageKit TOCTOU userspace LPE.
# Needs GLib/GIO for D-Bus; the build autodetects via `pkg-config gio-2.0`.
# When absent (e.g. no libglib2.0-dev on the build host), the module
# compiles as a stub that returns PRECOND_FAIL with a hint to install
# the dev package and rebuild.
P2TR_DIR := modules/pack2theroot_cve_2026_41651
P2TR_SRCS := $(P2TR_DIR)/skeletonkey_modules.c
P2TR_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(P2TR_SRCS))
P2TR_GIO_OK := $(shell pkg-config --exists gio-2.0 2>/dev/null && echo 1 || echo 0)
ifeq ($(P2TR_GIO_OK),1)
P2TR_CFLAGS := $(shell pkg-config --cflags gio-2.0) -DPACK2TR_HAVE_GIO
P2TR_LIBS := $(shell pkg-config --libs gio-2.0)
else
P2TR_CFLAGS :=
P2TR_LIBS :=
endif
# Per-object CFLAGS for the pack2theroot translation unit (GLib include
# paths). Target-specific vars are scoped to this object's recipe.
$(P2TR_OBJS): CFLAGS += $(P2TR_CFLAGS)
# Top-level dispatcher
TOP_OBJ := $(BUILD)/skeletonkey.o
# All module objects in one var so both the main binary and the test
# binary can re-use the list without duplicating the long enumeration.
MODULE_OBJS := $(CFF_OBJS) $(DP_OBJS) $(EB_OBJS) $(PK_OBJS) $(NFT_OBJS) \
$(OVL_OBJS) $(CR4_OBJS) $(DCOW_OBJS) $(PTM_OBJS) $(NXC_OBJS) \
$(AFP_OBJS) $(FUL_OBJS) $(STR_OBJS) $(AFP2_OBJS) $(CRA_OBJS) \
$(OSU_OBJS) $(NSU_OBJS) $(AUG_OBJS) $(NFD_OBJS) $(NPL_OBJS) \
$(SAM_OBJS) $(SEQ_OBJS) $(SUE_OBJS) $(VMW_OBJS) \
$(DDC_OBJS) $(FGN_OBJS) $(P2TR_OBJS)
ALL_OBJS := $(TOP_OBJ) $(CORE_OBJS) $(MODULE_OBJS)
# Tests — `make test` builds and runs the detect() unit-test harness.
# Links against the same module objects as the main binary minus the
# top-level dispatcher (which provides main(); the test has its own).
TEST_DIR := tests
TEST_SRCS := $(TEST_DIR)/test_detect.c
TEST_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(TEST_SRCS))
TEST_BIN := skeletonkey-test
TEST_ALL_OBJS := $(TEST_OBJS) $(CORE_OBJS) $(MODULE_OBJS)
.PHONY: all clean debug static help test
all: $(BIN)
$(BIN): $(ALL_OBJS)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ -lpthread $(P2TR_LIBS)
$(TEST_BIN): $(TEST_ALL_OBJS)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ -lpthread $(P2TR_LIBS)
test: $(TEST_BIN)
@echo "[*] running test suite ($(TEST_BIN))"
./$(TEST_BIN)
# Generic compile: any .c → corresponding .o under build/
$(BUILD)/%.o: %.c
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) -Icore -I$(CFF_DIR)/src -c -o $@ $<
debug: CFLAGS := -O0 -g3 -Wall -Wextra -Wno-unused-parameter -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
debug: clean $(BIN)
static: LDFLAGS += -static
static: clean $(BIN)
clean:
rm -rf $(BUILD) $(BIN) $(TEST_BIN)
help:
@echo "Targets:"
@echo " make build optimized skeletonkey binary"
@echo " make debug build with -O0 -g3"
@echo " make static build a fully static binary"
@echo " make test build + run the detect() unit test suite"
@echo " make clean remove build artifacts"
@echo ""
@echo "Per-module (legacy) — not built by default:"
@echo " cd modules/copy_fail_family && make"
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