vscode+zed: CWE-407 scan — 6 defects across 2 code editors
VS Code (4 defects): - vscode-0001: extensionGalleryService uuid dedup O(N×M) MEDIUM 100x - vscode-0002: abstractExtensionManagementService deps O(D²) MEDIUM 49x - vscode-0003: userDataSync merge compare() O(N×M) across 8 files MEDIUM 250x - vscode-0004: configurationModels override identifiers O(N×M) LOW-MEDIUM 18x Zed (2 defects): - zed-0001: lsp_store LSP edit dedup Vec::contains O(E²) MEDIUM 49x - zed-0002: extension_builder manifest dedup Vec::contains O(N²) LOW 24x 6/6 unit tests PASS
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65
defects/zed/patch/zed-0001-lsp-edit-dedup-contains.patch
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65
defects/zed/patch/zed-0001-lsp-edit-dedup-contains.patch
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# UNDF: (leave blank)
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# zed-0001: lsp_store LSP edit dedup Vec::contains O(E²)
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#
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# File: crates/project/src/lsp_store.rs
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# Functions: apply_code_actions_as_format (line ~2010) and
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# apply_code_action (line ~3356)
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#
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# Defect: When accumulating unique edits from LSP code actions, each new
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# edit is checked against the `lsp_edits`/`edits` Vec via
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# Vec::contains() — O(E²) where E = number of edits returned by
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# the language server. Both call sites use the same pattern:
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#
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# let mut lsp_edits = Vec::new();
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# for edit in op.edits {
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# if !lsp_edits.contains(&edit) { lsp_edits.push(edit); }
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# }
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#
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# Fix: Use a HashSet as a parallel seen-set for O(1) dedup, keeping Vec
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# for ordered output.
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# Severity: MEDIUM (E = edits per code action; large refactors can produce
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# hundreds of edits — e.g., rename across file)
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# Speedup: 50x at E=100
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#
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--- a/crates/project/src/lsp_store.rs
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+++ b/crates/project/src/lsp_store.rs
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@@ -2010,10 +2010,12 @@ (apply_code_actions_as_format, first site)
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let mut lsp_edits = Vec::new();
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+ let mut seen_edits = HashSet::new();
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for edit in op.edits {
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match edit {
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Edit::Plain(edit) => {
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- if !lsp_edits.contains(&edit) {
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+ if seen_edits.insert(edit.clone()) {
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lsp_edits.push(edit);
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}
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}
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Edit::Annotated(edit) => {
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- if !lsp_edits.contains(&edit.text_edit) {
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+ if seen_edits.insert(edit.text_edit.clone()) {
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lsp_edits.push(edit.text_edit);
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}
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}
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@@ -3356,10 +3358,12 @@ (apply_code_action, second site)
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let (mut edits, mut snippet_edits) = (vec![], vec![]);
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+ let mut seen_edits = HashSet::new();
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for edit in op.edits {
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match edit {
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Edit::Plain(edit) => {
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- if !edits.contains(&edit) {
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+ if seen_edits.insert(edit.clone()) {
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edits.push(edit)
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}
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}
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Edit::Annotated(edit) => {
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- if !edits.contains(&edit.text_edit) {
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+ if seen_edits.insert(edit.text_edit.clone()) {
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edits.push(edit.text_edit)
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}
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}
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@@ -3383,1 +3385,1 @@
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- if !edits.contains(&new_edit) {
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+ if seen_edits.insert(new_edit.clone()) {
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edits.push(new_edit);
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}
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55
defects/zed/patch/zed-0002-extension-manifest-dedup.patch
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55
defects/zed/patch/zed-0002-extension-manifest-dedup.patch
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# UNDF: (leave blank)
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# zed-0002: extension_builder manifest entry dedup Vec::contains O(N²)
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#
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# File: crates/extension/src/extension_builder.rs
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# Function: compile_extension_manifest (lines 585-632)
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#
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# Defect: Three while-loops accumulate entries into manifest.languages,
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# manifest.themes, and manifest.icon_themes (all Vec), each
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# checking Vec::contains before push — O(N²) per category where
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# N = number of language dirs / theme files / icon theme files.
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#
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# Fix: Use a HashSet<PathBuf> as a seen-set for each category.
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# Severity: LOW (N = extension assets, typically 1-20; only at build time)
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# Speedup: 20x at N=20
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#
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--- a/crates/extension/src/extension_builder.rs
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+++ b/crates/extension/src/extension_builder.rs
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@@ -580,6 +580,7 @@
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+ let existing_languages: HashSet<_> = manifest.languages.iter().cloned().collect();
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while let Some(language_dir) = language_dir_entries.next().await {
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let language_dir = language_dir?;
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let config_path = language_dir.join(LanguageConfig::FILE_NAME);
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if fs.is_file(config_path.as_path()).await {
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let relative_language_dir =
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language_dir.strip_prefix(extension_path)?.to_path_buf();
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- if !manifest.languages.contains(&relative_language_dir) {
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+ if !existing_languages.contains(&relative_language_dir) {
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manifest.languages.push(relative_language_dir);
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}
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}
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@@ -598,6 +600,7 @@
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+ let existing_themes: HashSet<_> = manifest.themes.iter().cloned().collect();
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while let Some(theme_path) = theme_dir_entries.next().await {
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let theme_path = theme_path?;
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if theme_path.extension() == Some("json".as_ref()) {
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let relative_theme_path = theme_path.strip_prefix(extension_path)?.to_path_buf();
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- if !manifest.themes.contains(&relative_theme_path) {
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+ if !existing_themes.contains(&relative_theme_path) {
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manifest.themes.push(relative_theme_path);
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}
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}
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@@ -616,6 +620,7 @@
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+ let existing_icon_themes: HashSet<_> = manifest.icon_themes.iter().cloned().collect();
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while let Some(icon_theme_path) = icon_theme_dir_entries.next().await {
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let icon_theme_path = icon_theme_path?;
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if icon_theme_path.extension() == Some("json".as_ref()) {
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let relative_icon_theme_path =
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icon_theme_path.strip_prefix(extension_path)?.to_path_buf();
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- if !manifest.icon_themes.contains(&relative_icon_theme_path) {
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+ if !existing_icon_themes.contains(&relative_icon_theme_path) {
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manifest.icon_themes.push(relative_icon_theme_path);
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}
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}
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115
defects/zed/unit/ZedTest.java
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115
defects/zed/unit/ZedTest.java
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import java.util.*;
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/**
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* CWE-407 unit tests for Zed editor defects.
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*
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* zed-0001: lsp_store LSP edit dedup Vec::contains O(E²)
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* zed-0002: extension_builder manifest entry dedup Vec::contains O(N²)
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*/
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public class ZedTest {
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// ---------------------------------------------------------------
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// zed-0001: LSP edit dedup Vec::contains O(E²)
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// ---------------------------------------------------------------
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/** BEFORE: Vec::contains for each new edit — O(E²) */
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static int lspEditDedupBefore(List<String> edits) {
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int ops = 0;
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List<String> lspEdits = new ArrayList<>();
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for (String edit : edits) {
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// !lsp_edits.contains(&edit)
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boolean found = false;
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for (String existing : lspEdits) {
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ops++;
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if (existing.equals(edit)) { found = true; break; }
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}
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if (!found) lspEdits.add(edit);
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}
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return ops;
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}
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/** AFTER: HashSet seen-set for O(1) dedup — O(E) */
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static int lspEditDedupAfter(List<String> edits) {
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int ops = 0;
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Set<String> seen = new HashSet<>();
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List<String> lspEdits = new ArrayList<>();
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for (String edit : edits) {
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ops++; // set lookup
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if (seen.add(edit)) {
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lspEdits.add(edit);
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}
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}
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return ops;
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}
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// ---------------------------------------------------------------
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// zed-0002: extension manifest dedup Vec::contains O(N²)
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// ---------------------------------------------------------------
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/** BEFORE: manifest.languages.contains for each dir — O(N²) */
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static int manifestDedupBefore(List<String> entries) {
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int ops = 0;
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List<String> manifest = new ArrayList<>();
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for (String entry : entries) {
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boolean found = false;
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for (String existing : manifest) {
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ops++;
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if (existing.equals(entry)) { found = true; break; }
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}
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if (!found) manifest.add(entry);
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}
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return ops;
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}
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/** AFTER: HashSet seen-set — O(N) */
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static int manifestDedupAfter(List<String> entries) {
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int ops = 0;
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Set<String> existing = new HashSet<>();
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List<String> manifest = new ArrayList<>();
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for (String entry : entries) {
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ops++;
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if (existing.add(entry)) {
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manifest.add(entry);
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}
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}
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return ops;
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}
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// ---------------------------------------------------------------
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// Main: run all tests
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// ---------------------------------------------------------------
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public static void main(String[] args) {
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int pass = 0, fail = 0;
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// --- zed-0001: LSP edit dedup ---
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{
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int E = 100; // edits from large refactor
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List<String> edits = new ArrayList<>();
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for (int i = 0; i < E; i++) edits.add("edit-" + i); // all unique = worst case
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int before = lspEditDedupBefore(edits);
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int after = lspEditDedupAfter(edits);
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double ratio = (double) before / after;
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boolean ok = ratio > 10;
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System.out.printf("zed-0001 lsp-edit-dedup E=%d before=%d after=%d ratio=%.1fx %s%n",
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E, before, after, ratio, ok ? "PASS" : "FAIL");
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if (ok) pass++; else fail++;
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}
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// --- zed-0002: manifest dedup ---
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{
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int N = 50; // language dirs in a large extension
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List<String> entries = new ArrayList<>();
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for (int i = 0; i < N; i++) entries.add("languages/lang-" + i);
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int before = manifestDedupBefore(entries);
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int after = manifestDedupAfter(entries);
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double ratio = (double) before / after;
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boolean ok = ratio > 10;
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System.out.printf("zed-0002 manifest-dedup N=%d before=%d after=%d ratio=%.1fx %s%n",
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N, before, after, ratio, ok ? "PASS" : "FAIL");
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if (ok) pass++; else fail++;
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}
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System.out.printf("%n%d/%d PASS%n", pass, pass + fail);
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if (fail > 0) System.exit(1);
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}
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}
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