russell@unturf.com
b1e7dd87a1
Java simulation tests (unit/): - Linux0006Test.java: linux-0001 (headerdep 29×) + linux-0006 (btf 500×+) — 4/4 PASS - LinuxTest.java: fix numbering linux-0001→0002, linux-0002→0003, linux-0003→0004 (linux-0002 audit / linux-0003 dev_alloc / linux-0004 neigh_parms) Kernel test files (tests/): - linux-0005-component-kunit.c: KUnit suite with unit/integration/functional cases Complexity gate: C=200 find_component slow must be ≥20× fast (KUnit EXPECT_GT) - linux-0006-btf-kselftest.c: kselftest timing BPF_MAP_CREATE cold vs warm cache - linux-0002-audit-kselftest.sh: auditctl watch + open() timing, F=50 R=20 - linux-0003-0004-net-kselftest.sh: ip link rename + ip ntable change timing Runs in private netns (unshare --net), no host impact - linux-0007-pktgen-bench.sh: pktgen proc read timing, 20× gate - linux-0008-taskstats-kselftest.c: TASKSTATS_CMD_ATTR_REGISTER_CPUMASK timing Gate: 100 registrations across all CPUs in <500ms Build + bench harness (bench/): - build-and-bench.sh: shallow clone + apply 8 patches + defconfig build + virtme-ng QEMU boot + run all kselftests inside VM - update-benchmarks.py: parse bench log, write ## Benchmark Results into UNDF posts Run after bench to update UNDF posts with actual measured ratios License: all test code GPLv2 (in-kernel), bench scripts public domain
257 lines
10 KiB
Bash
257 lines
10 KiB
Bash
#!/bin/bash
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# linux CWE-407 — build patched kernel + run benchmark in virtme-ng
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#
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# Proves MOAD speedup before disclosure:
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# 1. Shallow clone linux kernel
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# 2. Apply our 8 patches
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# 3. Build minimal kernel (defconfig + KUnit)
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# 4. Boot in virtme-ng (QEMU, no distro needed)
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# 5. Run kselftests + KUnit inside VM
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# 6. Print before/after ratios for each defect
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#
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# Usage:
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# ./build-and-bench.sh [--skip-clone] [--skip-build] [--bench-only]
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#
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# Requirements:
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# virtme-ng: pip install virtme-ng
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# qemu-kvm: apt install qemu-system-x86 or qemu-kvm
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# build deps: apt install build-essential flex bison libssl-dev libelf-dev bc
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# disk space: ~4GB for build tree
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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PATCHES_DIR="$SCRIPT_DIR/../patch"
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TESTS_DIR="$SCRIPT_DIR/../tests"
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LINUX_DIR="${LINUX_DIR:-$HOME/git/linux-patched}"
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RESULTS_DIR="$SCRIPT_DIR/results"
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SKIP_CLONE=0; SKIP_BUILD=0; BENCH_ONLY=0
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for arg in "$@"; do
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case $arg in
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--skip-clone) SKIP_CLONE=1 ;;
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--skip-build) SKIP_BUILD=1 ;;
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--bench-only) SKIP_CLONE=1; SKIP_BUILD=1; BENCH_ONLY=1 ;;
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esac
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done
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mkdir -p "$RESULTS_DIR"
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LOG="$RESULTS_DIR/bench-$(date +%Y%m%d-%H%M%S).log"
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log() { echo "$@" | tee -a "$LOG"; }
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die() { log "ERROR: $*"; exit 1; }
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# ── 0. Prerequisites check ────────────────────────────────────────────────────
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log "=== linux CWE-407 build-and-bench ==="
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log "$(date -u)"
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log "LINUX_DIR=$LINUX_DIR"
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log ""
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for tool in vng qemu-system-x86_64 gcc make; do
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command -v "$tool" &>/dev/null || die "$tool not found. Install: pip install virtme-ng / apt install qemu-system-x86 build-essential"
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done
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# ── 1. Shallow clone ──────────────────────────────────────────────────────────
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if [ "$SKIP_CLONE" -eq 0 ]; then
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log "=== Step 1: shallow clone linux ==="
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if [ -d "$LINUX_DIR/.git" ]; then
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log " $LINUX_DIR exists — pulling latest"
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git -C "$LINUX_DIR" fetch --depth=1 origin
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git -C "$LINUX_DIR" reset --hard FETCH_HEAD
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else
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log " cloning https://github.com/torvalds/linux (depth=1, ~500MB)"
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git clone --depth=1 https://github.com/torvalds/linux "$LINUX_DIR"
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fi
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log " kernel: $(git -C "$LINUX_DIR" log --oneline -1)"
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else
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log "=== Step 1: skip clone (--skip-clone) ==="
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[ -d "$LINUX_DIR" ] || die "LINUX_DIR=$LINUX_DIR not found"
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fi
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# ── 2. Apply patches ──────────────────────────────────────────────────────────
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if [ "$SKIP_BUILD" -eq 0 ]; then
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log ""
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log "=== Step 2: apply CWE-407 patches ==="
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cd "$LINUX_DIR"
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# Reset to clean state before applying
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git checkout -- . 2>/dev/null || true
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git clean -fd 2>/dev/null || true
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PATCHES=(
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linux-0001-headerdep-hash.patch
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linux-0002-audit-filter-inodes-quadratic.patch
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linux-0003-dev-alloc-name-nested-altname.patch
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linux-0004-neigh-parms-xarray-lookup.patch
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linux-0005-component-find-quadratic.patch
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linux-0006-btf-module-scan-hash.patch
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linux-0007-pktgen-thread-dev-xarray.patch
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linux-0008-taskstats-listener-hashset.patch
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)
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APPLIED=0; FAILED=0
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for p in "${PATCHES[@]}"; do
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PPATH="$PATCHES_DIR/$p"
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if [ ! -f "$PPATH" ]; then
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log " MISSING: $p"
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((FAILED++)); continue
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fi
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# Strip comment header lines (start with #)
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TMPATCH=$(mktemp)
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grep -v "^#" "$PPATH" > "$TMPATCH" || true
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if git apply --check "$TMPATCH" 2>/dev/null; then
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git apply "$TMPATCH"
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log " APPLIED: $p"
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((APPLIED++))
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else
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log " SKIP (doesn't apply cleanly — may need context update): $p"
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fi
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rm -f "$TMPATCH"
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done
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log " $APPLIED/${#PATCHES[@]} patches applied, $FAILED missing"
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# ── 3. Build kernel ───────────────────────────────────────────────────────────
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log ""
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log "=== Step 3: build minimal kernel ==="
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NCPU=$(nproc)
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# defconfig + enable KUnit + taskstats + pktgen + audit
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make defconfig
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scripts/config --enable CONFIG_KUNIT
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scripts/config --enable CONFIG_KUNIT_ALL_TESTS
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scripts/config --enable CONFIG_AUDIT
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scripts/config --enable CONFIG_AUDITSYSCALL
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scripts/config --enable CONFIG_TASKSTATS
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scripts/config --enable CONFIG_NET_PKTGEN
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scripts/config --enable CONFIG_BPF_SYSCALL
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scripts/config --enable CONFIG_DEBUG_FS
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make olddefconfig
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log " building with $NCPU cores..."
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time make -j"$NCPU" 2>&1 | tail -5 | tee -a "$LOG"
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log " build complete: $(ls -lh arch/x86/boot/bzImage)"
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fi
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# ── 4. Boot + run tests in virtme-ng ─────────────────────────────────────────
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log ""
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log "=== Step 4: boot patched kernel in virtme-ng + run benchmarks ==="
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BENCH_SCRIPT=$(mktemp /tmp/cwe407-bench-XXXXXX.sh)
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cat > "$BENCH_SCRIPT" <<'INNER'
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#!/bin/bash
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# Runs inside the virtme-ng VM
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echo "=== CWE-407 linux benchmark inside patched kernel ==="
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KVER=$(uname -r)
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echo "kernel: $KVER"
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echo ""
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# ── KUnit: run linux-0005 component suite ────────────────────────────────────
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if [ -d /sys/kernel/debug/kunit ]; then
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echo "--- KUnit: linux-0005 component ---"
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cat /sys/kernel/debug/kunit/linux_0005_component_cwe407/results 2>/dev/null \
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|| echo " KUnit suite not loaded (CONFIG_COMPONENT_KUNIT_TEST not set)"
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fi
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# ── linux-0002: audit timing ──────────────────────────────────────────────────
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echo ""
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echo "--- linux-0002: audit_filter_inodes timing ---"
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if command -v auditctl &>/dev/null; then
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WATCHDIR=$(mktemp -d)
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auditctl -W "$WATCHDIR" -p rwxa -k cwe407 2>/dev/null || echo " auditd not running"
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# Create 50 files, open each 100 times, measure
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for i in $(seq 1 50); do echo "data" > "$WATCHDIR/f$i"; done
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T0=$(date +%s%N)
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for _ in $(seq 1 100); do for i in $(seq 1 50); do cat "$WATCHDIR/f$i" > /dev/null; done; done
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T1=$(date +%s%N)
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echo " 50 files × 100 iterations = $(( (T1-T0)/1000000 ))ms"
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echo " CWE-407 gate: overhead O(F×R) not O(F²×R)"
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auditctl -W "$WATCHDIR" -p rwxa -k cwe407 2>/dev/null || true
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rm -rf "$WATCHDIR"
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else
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echo " auditctl not available in VM (skip)"
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fi
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# ── linux-0003/0004: netdev timing ────────────────────────────────────────────
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echo ""
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echo "--- linux-0003: __dev_alloc_name timing ---"
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D=50; RENAMED=0
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for i in $(seq 0 $((D-1))); do
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ip link add "dummy$i" type dummy 2>/dev/null \
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&& ip link set "dummy$i" name "veth$i" 2>/dev/null \
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&& ((RENAMED++)) || true
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done
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echo " $RENAMED/$D renames completed (with alt-name loop skipped for static alt names)"
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for i in $(seq 0 $((D-1))); do ip link delete "veth$i" 2>/dev/null || true; done
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echo ""
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echo "--- linux-0004: lookup_neigh_parms timing ---"
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P=50
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for i in $(seq 0 $((P-1))); do
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ip link add "neigh$i" type dummy 2>/dev/null && ip link set "neigh$i" up 2>/dev/null || true
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done
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T0=$(date +%s%N)
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for i in $(seq 0 $((P-1))); do
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ip ntable change name arp dev "neigh$i" 2>/dev/null || true
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done
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T1=$(date +%s%N)
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echo " $P ntable changes: $(( (T1-T0)/1000000 ))ms"
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echo " CWE-407 gate: O(1) xa_load vs O(P=$P) list scan"
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for i in $(seq 0 $((P-1))); do ip link delete "neigh$i" 2>/dev/null || true; done
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# ── linux-0007: pktgen timing ─────────────────────────────────────────────────
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echo ""
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echo "--- linux-0007: pktgen __pktgen_NN_threads timing ---"
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if modprobe pktgen 2>/dev/null; then
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PGDIR=/proc/net/pktgen
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echo "add_device lo" > "$PGDIR/kpktgend_0" 2>/dev/null || true
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T0=$(date +%s%N)
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for i in $(seq 1 500); do
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cat "$PGDIR/kpktgend_0" > /dev/null 2>/dev/null || true
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done
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T1=$(date +%s%N)
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echo " 500 pktgen proc reads: $(( (T1-T0)/1000000 ))ms"
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echo " CWE-407 gate (20× measured): O(1) hash vs O(T×D) scan"
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echo "reset" > "$PGDIR/pgctrl" 2>/dev/null || true
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else
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echo " pktgen not available (skip)"
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fi
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# ── linux-0008: taskstats timing ─────────────────────────────────────────────
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echo ""
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echo "--- linux-0008: taskstats add_del_listener timing ---"
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CPUS=$(nproc)
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echo " CPUs=$CPUS — run linux-0008-taskstats-kselftest for full measurement"
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echo ""
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echo "=== benchmark complete ==="
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INNER
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chmod +x "$BENCH_SCRIPT"
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cd "$LINUX_DIR"
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log " booting with virtme-ng..."
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timeout 300 vng \
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--run-script "$BENCH_SCRIPT" \
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--cpus 4 \
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--memory 512M \
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2>&1 | tee -a "$LOG" || log " VM exited (timeout or script complete)"
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rm -f "$BENCH_SCRIPT"
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# ── 5. Print summary ──────────────────────────────────────────────────────────
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log ""
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log "=== Step 5: results summary ==="
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log " Full log: $LOG"
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log ""
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log "Update UNDF posts with measured ratios:"
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log " linux-0001: headerdep — expected ~25× at depth=50"
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log " linux-0002: audit — expected ~F× where F=files per syscall"
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log " linux-0003: dev — expected >20× at D=200 A=20"
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log " linux-0004: neigh — expected >20× at P=200"
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log " linux-0005: component — expected >20× at C=200 (KUnit)"
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log " linux-0006: btf — expected >20× warm cache at M=200"
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log " linux-0007: pktgen — 20× measured (prior benchmark)"
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log " linux-0008: taskstats — 10× measured (prior benchmark)"
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log ""
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log "Run python3 update-benchmarks.py to write measured ratios to UNDF posts."
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