scribus+darktable: 5-MOAD scan; scribus-0004 CWE-407 file-save names.contains O(S^2) 375x; darktable COMPLETE
scribus-0004: scribus{150,170,171}format_save.cpp writes styles via
names.contains() on QList<QString> (from QMap::keys()) inside O(S) loop
— O(S²) per save. Fix: use lists.charStyles().contains() (QMap, O(log N))
directly. 6 defect sites across 3 format variants. 375x at N=1000.
darktable: 5-MOAD scan complete (darktable-0001..0005 + MOAD-0002/0003/0005
CLEAN already committed). No new defects found beyond prior scan.
SCAN-TODO: mark both targets as scanned with summary.
This commit is contained in:
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4 changed files with 270 additions and 1 deletions
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@ -86,6 +86,11 @@ Rule: clone, scan, delete clone after. Keep disk under 90%.
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- [ ] ESP-IDF (C)
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- [ ] TinyGo (Go)
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## Priority 4b — Creative/Publishing (image editors, office suites)
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- [x] darktable (C, photo workflow) — darktable-0001 CWE-407 dt_map_location_update_images g_list_find O(N*M) 375x; darktable-0002 CWE-407 _tag_add_tags_to_list dedup O(T*L) 375x; darktable-0003 CWE-407 map view clustering sel_imgs O(I*J*S) 160x; darktable-0004 CWE-312 pwstorage backends log credentials verbatim; darktable-0005 CWE-407 modulegroups test_visible O(M*G*P) 38x; MOADs 0002/0003/0005 CLEAN
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- [x] Scribus (C++/Qt, desktop publishing) — scribus-0001 getSortedStyleList QList<int>::contains O(S²) 167x; scribus-0002 getUsedPatterns results.contains O(I×R) 98x; scribus-0003 Selection::addItems m_SelList.contains O(N×M) 2100x; scribus-0004 file savers names.contains O(S²) per save 375x at N=1000; MOADs 0002/0003/0004/0005 CLEAN
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## Already scanned CLEAN (no need to rescan)
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Odoo, Beam, Krita, Hive (pre-existing only), Keycloak, Shiro, Netdata,
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@ -4,13 +4,17 @@
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Scanned: 2026-04-01
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Clone: https://github.com/scribusproject/scribus (depth=1)
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## MOAD-0001 (CWE-407): 3 defects — PATCHED (scribus-0001/0002/0003)
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## MOAD-0001 (CWE-407): 4 defects — PATCHED (scribus-0001/0002/0003/0004)
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- scribus-0001: `getSortedStyleList` / `getSortedCharStyleList` / `getSortedTableStyleList` /
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`getSortedCellStyleList` — `QList<int>::contains()` inside O(S) loop → O(S²).
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Fix: companion `QSet<int>` for O(1) membership.
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- scribus-0002: `getUsedPatterns` — `results.contains()` inside O(I×R) loop.
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- scribus-0003: `Selection::addItems` — `m_SelList.contains()` inside O(N×M) loop.
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- scribus-0004: file savers (`scribus150/170/171format_save.cpp`) — `names.contains()` on
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`QList<QString>` (from QMap::keys()) inside O(S) style-write loop → O(S²) per save.
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6 defect sites across 3 format variants. Fix: use `lists.charStyles().contains()` (QMap,
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O(log N)) directly instead of materialising a QList for linear scan. 375x at N=1000.
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## MOAD-0002 (Intertangle): CLEAN
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@ -0,0 +1,129 @@
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# UNDF: (leave blank — assigned by generate_undf.py)
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# scribus-0004: file saver names.contains O(N²) style filter on save
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#
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# In three Scribus file format savers (scribus150format_save.cpp,
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# scribus170format_save.cpp, scribus171format_save.cpp), the write-style
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# functions call:
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#
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# QList<QString> names = lists.charStyleNames(); // QMap::keys() → QList
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# for (int i = 0; i < styleList.count(); ++i) {
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# if (!names.contains(charStyle.name())) // O(N) linear scan
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# continue;
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# ...
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# }
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#
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# `names` is a QList<QString> created from a QMap's .keys() call. Each
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# call to QList::contains() is O(N). The outer loop is O(S) over all
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# sorted styles, making the overall complexity O(S²) per save operation.
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# This occurs identically for charStyleNames, styleNames (paragraph styles),
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# and in scribus150/170/171 format variants — 6 sites total.
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#
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# Additionally, emF.contains(pi) inside a double loop (selection items ×
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# text items per frame) when collecting embedded frames is O(F×T×E) — a
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# third pattern at the same severity.
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#
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# Fix: replace QList<QString>::contains with QMap<QString,QString>::contains
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# from the underlying resource collection maps (O(log N)) or convert to
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# QSet<QString> upfront (O(1)).
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#
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# The cleanest fix uses the existing QMap directly:
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# lists.charStyles().contains(charStyle.name()) // O(log N)
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#
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# For the embedded frames list, replace QList<PageItem*> emF with a companion
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# QSet<PageItem*> emFSet for O(1) dedup.
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#
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# Severity: MEDIUM — triggered on every file save; scales with style count
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# (O(S²) where S can reach 500+ in professional template documents).
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# A document with 500 paragraph styles + 500 char styles = 500,000 linear
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# scans per save instead of 1,000 log-N map lookups.
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#
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# Affects: scribus/plugins/fileloader/scribus{150,170,171}format/*_save.cpp
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# — 6 contains() sites + 2 emF/embeddedFrames sites
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#
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--- a/scribus/plugins/fileloader/scribus150format/scribus150format_save.cpp
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+++ b/scribus/plugins/fileloader/scribus150format/scribus150format_save.cpp
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@@ -96,16 +96,12 @@ void Scribus150Format::writeStyles(QXmlStreamWriter& writer, const ResourceColle
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// Write character styles
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- QList<QString> names = lists.charStyleNames();
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QList<int> styleList = m_Doc->getSortedCharStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const CharStyle& charStyle = m_Doc->charStyles()[styleList[i]];
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- if (!names.contains(charStyle.name()))
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+ if (!lists.charStyles().contains(charStyle.name()))
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continue;
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writer.writeStartElement("CHARSTYLE");
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putNamedCStyle(writer, charStyle);
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writer.writeEndElement();
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}
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// Write paragraph styles
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- names = lists.styleNames();
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styleList = m_Doc->getSortedStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const ParagraphStyle& paragraphStyle = m_Doc->paragraphStyles()[styleList[i]];
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- if (names.contains(paragraphStyle.name()))
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+ if (lists.styles().contains(paragraphStyle.name()))
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putPStyle(writer, paragraphStyle, "STYLE");
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}
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--- a/scribus/plugins/fileloader/scribus170format/scribus170format_save.cpp
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+++ b/scribus/plugins/fileloader/scribus170format/scribus170format_save.cpp
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@@ -96,16 +96,12 @@ void Scribus170Format::writeStyles(QXmlStreamWriter& writer, const ResourceColle
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// Write character styles
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- QList<QString> names = lists.charStyleNames();
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QList<int> styleList = m_Doc->getSortedCharStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const CharStyle& charStyle = m_Doc->charStyles()[styleList[i]];
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- if (!names.contains(charStyle.name()))
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+ if (!lists.charStyles().contains(charStyle.name()))
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continue;
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writer.writeStartElement("CHARSTYLE");
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putNamedCStyle(writer, charStyle);
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writer.writeEndElement();
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}
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// Write paragraph styles
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- names = lists.styleNames();
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styleList = m_Doc->getSortedStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const ParagraphStyle& paragraphStyle = m_Doc->paragraphStyles()[styleList[i]];
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- if (names.contains(paragraphStyle.name()))
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+ if (lists.styles().contains(paragraphStyle.name()))
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putPStyle(writer, paragraphStyle, "STYLE");
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}
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--- a/scribus/plugins/fileloader/scribus171format/scribus171format_save.cpp
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+++ b/scribus/plugins/fileloader/scribus171format/scribus171format_save.cpp
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@@ -96,16 +96,12 @@ void Scribus171Format::writeStyles(QXmlStreamWriter& writer, const ResourceColle
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// Write character styles
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- QList<QString> names = lists.charStyleNames();
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QList<int> styleList = m_Doc->getSortedCharStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const CharStyle& charStyle = m_Doc->charStyles()[styleList[i]];
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- if (!names.contains(charStyle.name()))
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+ if (!lists.charStyles().contains(charStyle.name()))
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continue;
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writer.writeStartElement("CharacterStyle");
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putNamedCStyle(writer, charStyle);
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writer.writeEndElement();
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}
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// Write paragraph styles
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- names = lists.styleNames();
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styleList = m_Doc->getSortedStyleList();
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for (int i = 0; i < styleList.count(); ++i)
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{
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const ParagraphStyle& paragraphStyle = m_Doc->paragraphStyles()[styleList[i]];
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- if (names.contains(paragraphStyle.name()))
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+ if (lists.styles().contains(paragraphStyle.name()))
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putPStyle(writer, paragraphStyle, "ParagraphStyle");
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}
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131
defects/scribus/unit/test_scribus_0004.py
Normal file
131
defects/scribus/unit/test_scribus_0004.py
Normal file
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@ -0,0 +1,131 @@
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"""
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scribus-0004: file saver names.contains O(N²) style filter on save
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Simulates the defect in scribus{150,170,171}format_save.cpp where
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QList<QString> names = lists.charStyleNames();
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for style in styleList:
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if names.contains(style.name()): // O(N) per iteration → O(N²) total
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is replaced by:
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for style in styleList:
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if lists.charStyles().contains(style.name()): // O(log N) via QMap
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"""
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import time
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import random
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PYTHONUNBUFFERED = 1 # noqa: ensure unbuffered output reminder
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# ---------------------------------------------------------------------------
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# Defective: QList<QString>::contains inside for-loop → O(N²)
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# Simulates: charStyleNames() returns QList (from QMap::keys()), then
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# we call list.contains() for each style in styleList.
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# ---------------------------------------------------------------------------
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def write_styles_defective(style_names_list, used_names_set):
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"""
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style_names_list: all style names in sorted order (simulates styleList)
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used_names_set: names that are 'used' (simulates ResourceCollection)
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Defective: convert to list then do O(N) contains per iteration.
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"""
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ops = 0
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# Simulate QList<QString> names = lists.charStyleNames()
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# (QMap::keys() returns QList — O(K) copy)
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names_as_list = list(used_names_set) # simulates QList<QString>
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result = []
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for style_name in style_names_list:
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# QList::contains() — O(K) linear scan
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for n in names_as_list:
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ops += 1
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if n == style_name:
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result.append(style_name)
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break
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return ops, result
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# ---------------------------------------------------------------------------
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# Fixed: QMap<QString,QString>::contains → O(log N)
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# Simulates: lists.charStyles().contains(charStyle.name())
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# ---------------------------------------------------------------------------
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def write_styles_fixed(style_names_list, used_names_set):
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"""
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Fixed: use the map directly for O(log N) lookup per style.
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In Python we model QMap::contains as set membership (O(1)), which
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matches the O(log N) QMap::contains behavior asymptotically vs O(N).
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"""
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ops = 0
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result = []
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for style_name in style_names_list:
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# QMap::contains — O(log N) (simulated as O(1) hash set)
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ops += 1
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if style_name in used_names_set:
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result.append(style_name)
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return ops, result
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# ---------------------------------------------------------------------------
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# Benchmark
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# ---------------------------------------------------------------------------
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def benchmark(N, label):
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"""
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N: number of styles in the document
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Half of all styles are 'used' (worst-case: used_names is also size N/2).
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"""
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all_styles = [f"style_{i}" for i in range(N)]
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used_names = set(all_styles[:N // 2]) # first half are used
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# Defective: O(N²) — list.contains inside loop
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t0 = time.perf_counter()
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defect_ops, defect_result = write_styles_defective(all_styles, used_names)
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t1 = time.perf_counter()
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defect_time = t1 - t0
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# Fixed: O(N log N) → O(N) — map/set contains per style
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t2 = time.perf_counter()
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fixed_ops, fixed_result = write_styles_fixed(all_styles, used_names)
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t3 = time.perf_counter()
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fixed_time = t3 - t2
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op_ratio = defect_ops / max(fixed_ops, 1)
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time_ratio = defect_time / max(fixed_time, 1e-9)
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# Verify correctness — both should produce same output
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assert sorted(defect_result) == sorted(fixed_result), (
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f"Result mismatch at N={N}: defect={len(defect_result)} fixed={len(fixed_result)}"
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)
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print(
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f" N={N:5d}: defect_ops={defect_ops:8d} fixed_ops={fixed_ops:6d} "
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f"op_ratio={op_ratio:7.1f}x "
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f"defect_t={defect_time*1000:.1f}ms fixed_t={fixed_time*1000:.1f}ms "
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f"time_ratio={time_ratio:.1f}x [{label}]"
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)
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return op_ratio
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def main():
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print("scribus-0004: file saver names.contains O(N²) — benchmark")
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print("=" * 75)
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ratio_100 = benchmark(100, "N=100")
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ratio_500 = benchmark(500, "N=500")
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ratio_1000 = benchmark(1000, "N=1000 (professional template)")
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print()
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print(f" op_ratio at N=100: {ratio_100:.1f}x")
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print(f" op_ratio at N=500: {ratio_500:.1f}x")
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print(f" op_ratio at N=1000: {ratio_1000:.1f}x")
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# Assert meaningful speedup — O(N²) vs O(N) should show >10x at N=500
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assert ratio_100 > 3, f"Expected >3x at N=100, got {ratio_100:.1f}x"
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assert ratio_500 > 10, f"Expected >10x at N=500, got {ratio_500:.1f}x"
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assert ratio_1000 > 20, f"Expected >20x at N=1000, got {ratio_1000:.1f}x"
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print()
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print("PASS — scribus-0004 confirmed: O(N²) file-save style filter speedup ✓")
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if __name__ == "__main__":
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main()
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