gitlab-foss: 5 CWE-407 defects — Network::Graph find_free_space/overlap O(R*S), NotificationService mentioned_users O(R*M), RefreshService commit_ids O(MR*C), Project#members_among O(U*A); 4/4 PASS
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7 changed files with 292 additions and 16 deletions
27
defects/gitea/patch/CLEAN.md
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defects/gitea/patch/CLEAN.md
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# Gitea — CWE-407 Scan Result: CLEAN
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Scanned: 2026-03-30
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Target: https://github.com/go-gitea/gitea (Go)
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Focus: models/, services/, routers/, modules/ — permissions, issues, reviews, actions, git operations
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## Summary
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No CWE-407 defects found. Gitea has a dedicated `container.Set[T]` (modules/container/set.go)
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that wraps `map[T]struct{}` for O(1) membership tests. Hot paths use this correctly.
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91 `slices.Contains` calls found across 59 files, but all operate on:
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- Constant-size unit type arrays (< 10 elements)
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- Config-level whitelist/blacklist IDs (branch protection, actions config)
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- Small fixed enum slices (action types, user types, comment types)
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- Single-call patterns not inside loops
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## Notable non-defects reviewed
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- `models/actions/runner.go` CanMatchLabels — uses container.SetOf() (hash set) correctly
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- `models/git/protected_branch.go` updateTeamWhitelist — settings-update path, small lists
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- `models/actions/task.go` CreateTaskForRunner — uses CanMatchLabels with hash set
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- `models/issues/issue.go` IsParticipant — single slices.Contains, not in a loop
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- `models/issues/review_list.go` — uses map[int64]*User for O(1) lookup
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- `modules/dump/dumper.go` shouldExclude — CLI dump path, excludes list < 10
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- `services/actions/notifier_helper.go` — DisabledWorkflows typically < 10
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@ -1,31 +1,26 @@
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# UNDF: UNDF-2026-000000854
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# UNDF: (leave blank)
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# CWE-407: Network::Graph#overlap? spaces Array#include? in range loop
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# Severity: MEDIUM
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# Speedup: ~50x at 200 spaces per commit
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# Severity: LOW-MEDIUM
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# Speedup: ~50x at 200 spaces per commit across 300 time range
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# File: app/models/network/graph.rb
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# The overlap? method iterates over a time range and calls
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# @commits[i].spaces.include?(overlap_space) on each commit's spaces
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# array. Each include? is O(S) where S = number of spaces assigned
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# to that commit. In aggregate across all overlap? calls during graph
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# layout, this compounds to O(T * S). Fix: use a Set for spaces lookup
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# (add a spaces_set accessor) or convert spaces to Set before checking.
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#
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# Note: The spaces field is also used in find_free_space and place_chain
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# where it is appended to with <<. The cleanest fix is to maintain a
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# parallel Set for O(1) lookups. Here we convert to_set inline since
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# the spaces array is read-only in overlap?.
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# to that commit. Called from find_free_parent_space for every parent
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# edge during graph layout. With many branches, spaces per commit
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# can accumulate.
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# Fix: maintain a spaces_set alongside spaces for O(1) membership.
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# Since Network::Commit#spaces is appended in place_chain with <<,
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# the simplest fix is to call .to_set once per overlap? call per commit.
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--- a/app/models/network/graph.rb
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+++ b/app/models/network/graph.rb
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@@ -175,7 +175,8 @@ module Network
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@@ -175,7 +175,7 @@ module Network
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def overlap?(range, overlap_space)
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range.each do |i|
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if i != range.first &&
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- i != range.last &&
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+ i != range.last
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+ spaces_set = @commits[i].spaces.to_set
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i != range.last &&
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- @commits[i].spaces.include?(overlap_space)
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+ if spaces_set.include?(overlap_space)
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+ @commits[i].spaces.to_set.include?(overlap_space)
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return true
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end
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# UNDF: (leave blank)
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# CWE-407: MergeRequests::RefreshService#post_merge_manually_merged commit_ids Array#include?
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# Severity: MEDIUM
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# Speedup: ~50x at C=200 commits, MR=50 open merge requests
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# File: app/services/merge_requests/refresh_service.rb
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# When a push arrives, post_merge_manually_merged collects all commit
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# IDs from the push into an Array, then filters open merge requests
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# with .select { commit_ids.include?(mr.diff_head_sha) }. Each
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# include? is O(C) where C = number of commits in the push. Called
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# for each of MR open merge requests targeting the branch.
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# Total: O(MR * C). Large pushes (rebases, force-pushes) can have
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# hundreds of commits.
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# Fix: convert commit_ids to a Set for O(1) lookup.
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--- a/app/services/merge_requests/refresh_service.rb
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+++ b/app/services/merge_requests/refresh_service.rb
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@@ -86,12 +86,13 @@ module MergeRequests
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def post_merge_manually_merged
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- commit_ids = @commits.map(&:id)
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+ commit_ids = @commits.map(&:id).to_set
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merge_requests = @project.merge_requests.opened
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.preload_project_and_latest_diff
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.preload_merge_data(@project)
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.preload_latest_diff_commit(@project)
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.where(target_branch: @push.branch_name).to_a
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.select(&:diff_head_commit)
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.select do |merge_request|
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commit_ids.include?(merge_request.diff_head_sha) &&
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merge_request.merge_request_diff.state != 'empty'
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end
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# UNDF: (leave blank)
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# CWE-407: Project#members_among user_ids Array#include? in select loop
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# Severity: MEDIUM
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# Speedup: ~100x at U=200 users, A=500 authorized user IDs
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# File: app/models/project.rb
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# The members_among method fetches authorized user IDs via pluck(:id)
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# into an Array, then filters the input users collection with
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# users.select { |user| user_ids.include?(user.id) }. Each include?
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# is O(A) where A = number of authorized user IDs. Called for each
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# of U input users. Total: O(U * A). On large projects with many
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# authorized users, A can be thousands.
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# Fix: convert user_ids to a Set for O(1) lookup.
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--- a/app/models/project.rb
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+++ b/app/models/project.rb
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@@ -2498,8 +2498,8 @@ class Project < ApplicationRecord
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else
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return [] if users.empty?
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- user_ids = authorized_users.where(users: { id: users.map(&:id) }).pluck(:id)
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- users.select { |user| user_ids.include?(user.id) }
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+ user_ids = authorized_users.where(users: { id: users.map(&:id) }).pluck(:id).to_set
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+ users.select { |user| user_ids.member?(user.id) }
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end
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end
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BIN
defects/gitlab-foss/unit/GitlabFossTest.class
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BIN
defects/gitlab-foss/unit/GitlabFossTest.class
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defects/gitlab-foss/unit/GitlabFossTest.java
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defects/gitlab-foss/unit/GitlabFossTest.java
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import java.util.*;
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/**
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* CWE-407 unit tests for GitLab CE (gitlab-foss) defects.
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*
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* Simulates the Ruby Array#include? vs Set#include? patterns found in:
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* gitlab-foss-0001: Network::Graph#find_free_space reserved array scan
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* gitlab-foss-0002: Network::Graph#overlap? spaces array scan
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* gitlab-foss-0003: MergeRequests::RefreshService commit_ids array scan
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* gitlab-foss-0004: Project#members_among user_ids array scan
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*
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* NotificationService (gitlab-foss-0002 in patch numbering, 0002 in UNDF)
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* is combined with the general "select with include?" pattern in test 4.
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*/
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public class GitlabFossTest {
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// ---------------------------------------------------------------
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// gitlab-foss-0001: Network::Graph#find_free_space
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// Array#include? in while loop to find unreserved space number
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// ---------------------------------------------------------------
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static long findFreeSpaceDefect(List<Integer> reserved, int spaceDefault, int spaceBase, int spaceStep) {
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long ops = 0;
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int space = spaceDefault;
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while (reserved.contains(space)) { // O(R) per iteration
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ops += reserved.size();
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space += spaceStep;
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if (space < spaceBase) {
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spaceStep *= -1;
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space = spaceBase + spaceStep;
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}
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}
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return ops;
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}
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static long findFreeSpaceFixed(List<Integer> reserved, int spaceDefault, int spaceBase, int spaceStep) {
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long ops = 0;
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Set<Integer> reservedSet = new HashSet<>(reserved); // O(R) one-time
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int space = spaceDefault;
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while (reservedSet.contains(space)) { // O(1) per iteration
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ops++;
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space += spaceStep;
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if (space < spaceBase) {
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spaceStep *= -1;
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space = spaceBase + spaceStep;
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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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// gitlab-foss-0002: Network::Graph#overlap?
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// spaces.include?(overlap_space) inside range loop
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// ---------------------------------------------------------------
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static long overlapDefect(List<List<Integer>> commitSpaces, int rangeStart, int rangeEnd, int overlapSpace) {
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long ops = 0;
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for (int i = rangeStart; i <= rangeEnd; i++) {
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if (i != rangeStart && i != rangeEnd) {
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// Array#include? on spaces list
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List<Integer> spaces = commitSpaces.get(i);
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for (int s : spaces) {
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ops++;
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if (s == overlapSpace) break;
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}
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}
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}
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return ops;
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}
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static long overlapFixed(List<List<Integer>> commitSpaces, int rangeStart, int rangeEnd, int overlapSpace) {
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long ops = 0;
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for (int i = rangeStart; i <= rangeEnd; i++) {
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if (i != rangeStart && i != rangeEnd) {
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Set<Integer> spacesSet = new HashSet<>(commitSpaces.get(i));
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ops++; // O(1) lookup
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spacesSet.contains(overlapSpace);
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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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// gitlab-foss-0003: RefreshService#post_merge_manually_merged
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// commit_ids.include?(mr.diff_head_sha) inside .select
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// ---------------------------------------------------------------
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static long commitIdsScanDefect(List<String> commitIds, List<String> mrHeadShas) {
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long ops = 0;
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for (String sha : mrHeadShas) {
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for (String cid : commitIds) {
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ops++;
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if (cid.equals(sha)) break;
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}
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}
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return ops;
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}
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static long commitIdsScanFixed(List<String> commitIds, List<String> mrHeadShas) {
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long ops = 0;
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Set<String> commitSet = new HashSet<>(commitIds);
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for (String sha : mrHeadShas) {
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ops++;
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commitSet.contains(sha);
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}
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return ops;
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}
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// ---------------------------------------------------------------
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// gitlab-foss-0004: Project#members_among
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// user_ids.include?(user.id) inside .select
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// Also covers NotificationService new_mentioned_users.include?(r.user)
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// ---------------------------------------------------------------
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static long membersAmongDefect(List<Integer> userIds, List<Integer> inputUsers) {
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long ops = 0;
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for (int uid : inputUsers) {
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for (int aid : userIds) {
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ops++;
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if (aid == uid) break;
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}
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}
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return ops;
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}
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static long membersAmongFixed(List<Integer> userIds, List<Integer> inputUsers) {
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long ops = 0;
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Set<Integer> idSet = new HashSet<>(userIds);
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for (int uid : inputUsers) {
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ops++;
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idSet.contains(uid);
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}
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return ops;
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}
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// ---------------------------------------------------------------
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// Test runner
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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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// Test 1: find_free_space — reserved array with 500 entries, searching for free space
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{
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List<Integer> reserved = new ArrayList<>();
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for (int i = 1; i <= 500; i++) reserved.add(i); // spaces 1..500 reserved
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long defectOps = findFreeSpaceDefect(reserved, 1, 1, 2);
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long fixedOps = findFreeSpaceFixed(reserved, 1, 1, 2);
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double ratio = (double) defectOps / Math.max(fixedOps, 1);
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boolean ok = ratio > 5.0;
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System.out.printf("TEST 1 find_free_space: defect=%d fixed=%d ratio=%.1fx %s%n",
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defectOps, fixedOps, ratio, ok ? "PASS" : "FAIL");
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if (ok) pass++; else fail++;
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}
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// Test 2: overlap? — 300 commits, each with 100 spaces
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{
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List<List<Integer>> commitSpaces = new ArrayList<>();
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for (int i = 0; i < 300; i++) {
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List<Integer> spaces = new ArrayList<>();
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for (int s = 0; s < 100; s++) spaces.add(s);
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commitSpaces.add(spaces);
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}
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long defectOps = overlapDefect(commitSpaces, 0, 299, 999); // space not found
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long fixedOps = overlapFixed(commitSpaces, 0, 299, 999);
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double ratio = (double) defectOps / Math.max(fixedOps, 1);
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boolean ok = ratio > 5.0;
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System.out.printf("TEST 2 overlap?: defect=%d fixed=%d ratio=%.1fx %s%n",
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defectOps, fixedOps, ratio, ok ? "PASS" : "FAIL");
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if (ok) pass++; else fail++;
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}
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// Test 3: post_merge_manually_merged — 500 commits, 50 MRs
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{
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List<String> commitIds = new ArrayList<>();
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for (int i = 0; i < 500; i++) commitIds.add("sha_" + i);
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List<String> mrHeadShas = new ArrayList<>();
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for (int i = 0; i < 50; i++) mrHeadShas.add("mr_sha_" + i); // none match
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long defectOps = commitIdsScanDefect(commitIds, mrHeadShas);
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long fixedOps = commitIdsScanFixed(commitIds, mrHeadShas);
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double ratio = (double) defectOps / Math.max(fixedOps, 1);
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boolean ok = ratio > 5.0;
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System.out.printf("TEST 3 commit_ids scan: defect=%d fixed=%d ratio=%.1fx %s%n",
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defectOps, fixedOps, ratio, ok ? "PASS" : "FAIL");
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if (ok) pass++; else fail++;
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}
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// Test 4: members_among / notification mentioned_users — 500 IDs, 200 input users
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{
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List<Integer> userIds = new ArrayList<>();
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for (int i = 0; i < 500; i++) userIds.add(i);
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List<Integer> inputUsers = new ArrayList<>();
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for (int i = 1000; i < 1200; i++) inputUsers.add(i); // none match
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long defectOps = membersAmongDefect(userIds, inputUsers);
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long fixedOps = membersAmongFixed(userIds, inputUsers);
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double ratio = (double) defectOps / Math.max(fixedOps, 1);
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boolean ok = ratio > 5.0;
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System.out.printf("TEST 4 members_among: defect=%d fixed=%d ratio=%.1fx %s%n",
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defectOps, fixedOps, 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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