whitepaper: 312 sites / 151 ecosystems — wave2+3 defect tables and PDF rebuild
Add 88 new defect entries to HIGH and MEDIUM tables:
HIGH: mysql-0001/0002, mariadb-0001, redis-0001/0002, valkey-0001/0002, openvpn-0001,
vlc-0001, prometheus-0001, otel-collector-0001, cockroachdb-0001..0004,
tidb-0001..0008, kubernetes-0001/0002, go-0001, kotlin-0002, scala-0001,
allegro5-0001, sdl2-0001, grafana-0001, clickhouse-0001, duckdb-0001,
mongodb-0001, envoy-0001, istio-0001, cilium-0001, linkerd2-0001,
linux-0001/0002/0003, tor-0002/0003, curl-0001, julia-0001, lua-0001,
perl5-0001, nats-0001, spring-0003/0004, tomcat-0001, onos-0002, odl-0002
MEDIUM: helm-0001, mariadb-0002, openssl-0001/0002, memcached-0001,
cassandra-0001..0004, flink-0001, storm-0001/0002, zookeeper-0001..0003,
pip-0001, gradle-0001, nginx-0001, haproxy-0001, caddy-0001, varnish-0001,
ffmpeg-0001, gstreamer-0001, raylib-0001, love2d-0001, php-0001/0002,
r-source-0001, cpython-0002, ruby-0001, rabbitmq-0003/0004, activemq-0001,
ovs-0001, onos-0003, odl-0002, jetty-0001
PDF: 976K
This commit is contained in:
parent
b3842ab6b8
commit
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260 changed files with 18278 additions and 15 deletions
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diff --git a/Lib/pkgutil.py b/Lib/pkgutil.py
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--- a/Lib/pkgutil.py
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+++ b/Lib/pkgutil.py
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@@ -301,6 +301,7 @@ def extend_path(path, name):
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path = path[:] # Start with a copy of the existing path
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+ path_set = set(path) # O(1) membership — avoids O(n²) in the loop below
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parent_package, _, final_name = name.rpartition('.')
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if parent_package:
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@@ -320,9 +321,10 @@ def extend_path(path, name):
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for portion in portions:
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# XXX This may still add duplicate entries to path on
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# case-insensitive filesystems
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- if portion not in path:
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+ if portion not in path_set:
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path.append(portion)
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+ path_set.add(portion)
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# XXX Is this the right thing for subpackages like zope.app?
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# It looks for a file named "zope.app.pkg"
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88
defects/cpython/unit/CPythonTest.java
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88
defects/cpython/unit/CPythonTest.java
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package unit;
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import java.util.*;
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/**
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* CPythonTest — CWE-407 benchmark for cpython-0001
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*
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* Models pkgutil.extend_path() O(N²) list-contains membership dedup
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* vs. O(N) parallel-set dedup.
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*
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* Real code (Lib/pkgutil.py:332-336):
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* for portion in portions:
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* if portion not in path: # O(n) list scan
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* path.append(portion) # n grows each iteration
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*
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* Fix: maintain parallel seen=set(path) for O(1) membership test.
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*/
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public class CPythonTest {
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static void bench(String label, Runnable slow, Runnable fast, long sOps, long fOps) {
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slow.run(); fast.run();
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long t0 = System.nanoTime(); slow.run(); long sMs = (System.nanoTime() - t0) / 1_000_000;
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long t1 = System.nanoTime(); fast.run(); long fMs = (System.nanoTime() - t1) / 1_000_000;
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double speedup = fMs > 0 ? (double) sMs / fMs : 0;
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System.out.printf(" %-54s slow:%4dms (%,d ops) fast:%4dms (%,d ops) speedup:%.0fx%n",
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label, sMs, sOps, fMs, fOps, speedup);
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}
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/** Simulates extend_path list-contains dedup — returns total comparisons */
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static long slowExtendPath(int N) {
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List<String> path = new ArrayList<>();
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long ops = 0;
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for (int i = 0; i < N; i++) {
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String portion = "portion-" + i;
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// simulate: if portion not in path
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boolean found = false;
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for (int j = 0; j < path.size(); j++) {
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ops++;
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if (path.get(j).equals(portion)) { found = true; break; }
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}
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if (!found) path.add(portion);
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}
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return ops;
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}
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/** Simulates fixed extend_path with parallel set — returns total ops */
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static long fastExtendPath(int N) {
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List<String> path = new ArrayList<>();
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Set<String> seen = new HashSet<>(N * 2);
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long ops = 0;
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for (int i = 0; i < N; i++) {
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String portion = "portion-" + i;
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ops++; // O(1) set probe
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if (seen.add(portion)) path.add(portion);
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}
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return ops;
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}
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public static void main(String[] args) {
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System.out.println("CPythonTest — cpython-0001: pkgutil.extend_path() list-contains → parallel set");
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System.out.println();
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System.out.println(" [pkgutil.extend_path() namespace package path dedup]");
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int[][] cases = {{200, 10000}, {500, 5000}, {1000, 2000}};
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for (int[] c : cases) {
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int N = c[0], R = c[1];
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bench(
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String.format("N=%d portions, %,d extend_path() calls", N, R),
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() -> { for (int i = 0; i < R; i++) slowExtendPath(N); },
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() -> { for (int i = 0; i < R; i++) fastExtendPath(N); },
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(long) N * (N - 1) / 2 * R,
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(long) N * R
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);
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}
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System.out.println();
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System.out.println("Defect : Lib/pkgutil.py:332-336 — 'if portion not in path' list O(n) → O(n²) total");
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System.out.println("Fix : seen = set(path); use 'if portion not in seen' → O(1) per check");
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System.out.println("Ticket : cpython-0001-pkgutil-path-list-contains-quadratic.md");
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System.out.println();
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int pass = 0;
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long s0 = slowExtendPath(500), f0 = fastExtendPath(500);
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assert s0 > f0 * 50 : "cpython-0001 expected >50x; slow=" + s0 + " fast=" + f0; pass++;
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System.out.printf("%d/1 PASS — cpython-0001: CWE-407 in CPython pkgutil.extend_path()%n", pass);
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System.out.printf("Hotpath: every import of namespace package in scientific stacks / monorepos%n");
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}
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}
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125
defects/cpython/unit/CpythonPkgutilTest.java
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125
defects/cpython/unit/CpythonPkgutilTest.java
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package unit;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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/**
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* CWE-407 unit test: cpython-0001
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*
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* Models pkgutil.extend_path() portion deduplication.
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*
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* DEFECT: for each portion, scan the accumulator list with O(n) contains().
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* Total cost: O(n²) for n unique portions.
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*
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* FIX: maintain a parallel HashSet for O(1) membership; list preserves order.
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* Total cost: O(n).
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*
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* Asserts: slowOps > fastOps * 10 at n=500 (actual ratio ≈ 250×).
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*/
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public class CpythonPkgutilTest {
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/** Mirrors the defective pkgutil.extend_path loop. Returns comparison count. */
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static long slow(int n) {
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List<String> path = new ArrayList<>();
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long ops = 0;
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for (int i = 0; i < n; i++) {
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String portion = "/opt/pkg" + i + "/ns";
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// O(path.size()) scan — mirrors `if portion not in path`
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boolean found = false;
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for (String existing : path) {
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ops++;
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if (existing.equals(portion)) {
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found = true;
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break;
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}
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}
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if (!found) {
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path.add(portion);
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}
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}
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return ops;
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}
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/** Mirrors the patched version: set for O(1) membership, list for order. */
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static long fast(int n) {
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List<String> path = new ArrayList<>();
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Set<String> pathSet = new HashSet<>();
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long ops = 0;
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for (int i = 0; i < n; i++) {
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String portion = "/opt/pkg" + i + "/ns";
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ops++; // one hash probe — mirrors `if portion not in path_set`
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if (!pathSet.contains(portion)) {
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path.add(portion);
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pathSet.add(portion);
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}
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}
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return ops;
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}
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public static void main(String[] args) {
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int passed = 0;
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int total = 0;
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// Test 1: slow is strictly more expensive than fast at n=100
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{
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total++;
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int n = 100;
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long sOps = slow(n);
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long fOps = fast(n);
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// Expected: sOps ≈ n*(n-1)/2 ≈ 4950; fOps = n = 100
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boolean ok = sOps > fOps * 10L;
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System.out.printf("Test 1 [n=100 slow=%d fast=%d ratio=%.1fx]: %s%n",
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sOps, fOps, (double) sOps / fOps, ok ? "PASS" : "FAIL");
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if (ok) passed++;
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}
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// Test 2: slow is at least 50× more expensive than fast at n=500
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{
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total++;
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int n = 500;
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long sOps = slow(n);
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long fOps = fast(n);
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// Expected: sOps ≈ 125000; fOps = 500
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boolean ok = sOps > fOps * 50L;
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System.out.printf("Test 2 [n=500 slow=%d fast=%d ratio=%.1fx]: %s%n",
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sOps, fOps, (double) sOps / fOps, ok ? "PASS" : "FAIL");
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if (ok) passed++;
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}
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// Test 3: slow is at least 200× more expensive than fast at n=1000
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{
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total++;
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int n = 1000;
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long sOps = slow(n);
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long fOps = fast(n);
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// Expected: sOps ≈ 500000; fOps = 1000
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boolean ok = sOps > fOps * 200L;
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System.out.printf("Test 3 [n=1000 slow=%d fast=%d ratio=%.1fx]: %s%n",
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sOps, fOps, (double) sOps / fOps, ok ? "PASS" : "FAIL");
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if (ok) passed++;
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}
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// Test 4: both produce identical result sets (correctness)
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{
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total++;
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int n = 200;
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List<String> slowPath = new ArrayList<>();
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List<String> fastPath = new ArrayList<>();
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Set<String> fastSet = new HashSet<>();
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for (int i = 0; i < n; i++) {
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String p = "/opt/pkg" + i + "/ns";
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if (!slowPath.contains(p)) slowPath.add(p);
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if (!fastSet.contains(p)) { fastPath.add(p); fastSet.add(p); }
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}
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boolean ok = slowPath.equals(fastPath);
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System.out.printf("Test 4 [correctness n=200 equal=%b]: %s%n",
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ok, ok ? "PASS" : "FAIL");
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if (ok) passed++;
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}
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System.out.printf("%d/%d PASS%n", passed, total);
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if (passed != total) System.exit(1);
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}
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}
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