Bug 150210 – Null dereference loading Blink layout test editing/selection/selectstart-event-crash.html

• Component: HTML Editing
• Status: RESOLVED FIXED

[Jon Honeycutt]

Created attachment 263227 [details]
crashing test

Null dereference loading Blink layout test editing/selection/selectstart-event-crash.html.

Stack trace:

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGABRT)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000020

VM Regions Near 0x20:
--> 
    __TEXT                 0000000106e12000-0000000106eac000 [  616K] r-x/rwx SM=COW  /Users/USER/*

Application Specific Information:
CRASHING TEST: blink-tests-that-are-unknown/editing/selection/selectstart-event-crash.html
================================================================
==21984==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000020 (pc 0x00010c55e1c1 bp 0x7fff58de9100 sp 0x7fff58de9100 T0)
    #0 0x10c55e1c0 in WebCore::Node::treeScope() const Node.h:405
    #1 0x10c55e188 in WebCore::Node::document() const Node.h:399
    #2 0x10ead6e80 in WebCore::VisibleSelection::firstRange() const VisibleSelection.cpp:132
    #3 0x10d00545c in WebCore::FrameSelection::respondToNodeModification(WebCore::Node&, bool, bool, bool, bool) FrameSelection.cpp:474
    #4 0x10d00527c in WebCore::FrameSelection::nodeWillBeRemoved(WebCore::Node&) FrameSelection.cpp:439
    #5 0x10cbe4285 in WebCore::Document::nodeChildrenWillBeRemoved(WebCore::ContainerNode&) Document.cpp:3936
    #6 0x10c8a7c82 in WebCore::willRemoveChildren(WebCore::ContainerNode&) ContainerNode.cpp:500
    #7 0x10c8a77a5 in WebCore::ContainerNode::removeChildren() ContainerNode.cpp:634
    #8 0x10df79963 in WebCore::Node::setTextContent(WTF::String const&, int&) Node.cpp:1466
    #9 0x10d993590 in WebCore::setJSNodeTextContent(JSC::ExecState*, JSC::JSObject*, long long, long long) JSNode.cpp:628
    #10 0x107ae0590 in JSC::JSObject::put(JSC::JSCell*, JSC::ExecState*, JSC::PropertyName, JSC::JSValue, JSC::PutPropertySlot&) JSObject.cpp:422
    #11 0x107c2c1fd in llint_slow_path_put_by_id LLIntSlowPaths.cpp:622
    #12 0x107c4096a in llint_entry (/Users/jhoneycutt/src/OpenSource/WebKitBuild2/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0xab196a)
    #13 0x107c3da0a in vmEntryToJavaScript (/Users/jhoneycutt/src/OpenSource/WebKitBuild2/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0xaaea0a)
    #14 0x10799f07d in JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) JITCode.cpp:80
    #15 0x10795c714 in JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) Interpreter.cpp:1024
    #16 0x10726d9d1 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) CallData.cpp:39
    #17 0x10726dac1 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) CallData.cpp:44
    #18 0x10d5879c7 in WebCore::JSMainThreadExecState::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) JSMainThreadExecState.h:56
    #19 0x10e544d4b in WebCore::ScheduledAction::executeFunctionInContext(JSC::JSGlobalObject*, JSC::JSValue, WebCore::ScriptExecutionContext&) ScheduledAction.cpp:104
    #20 0x10e5447b2 in WebCore::ScheduledAction::execute(WebCore::Document&) ScheduledAction.cpp:125
    #21 0x10cd73ef6 in WebCore::DOMTimer::fired() DOMTimer.cpp:356
    #22 0x10ea470e4 in WebCore::ThreadTimers::sharedTimerFiredInternal() ThreadTimers.cpp:132
    #23 0x10e6b0658 in WebCore::timerFired(__CFRunLoopTimer*, void*) SharedTimerCF.cpp:82
    #24 0x7fff96fa2c83 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x92c83)
    #25 0x7fff96fa2912 in __CFRunLoopDoTimer (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x92912)
    #26 0x7fff96fa2469 in __CFRunLoopDoTimers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x92469)
    #27 0x7fff96f99960 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x89960)
    #28 0x7fff96f98fc7 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x88fc7)
    #29 0x106e3498d in runTest(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) DumpRenderTree.mm:2030
    #30 0x106e33f39 in runTestingServerLoop() DumpRenderTree.mm:1180
    #31 0x106e33267 in dumpRenderTree(int, char const**) DumpRenderTree.mm:1288
    #32 0x106e352b1 in DumpRenderTreeMain(int, char const**) DumpRenderTree.mm:1418
    #33 0x7fff931e95ac in start (/usr/lib/system/libdyld.dylib+0x35ac)
    #34 0x1  (<unknown module>)

[Radar WebKit Bug Importer]

<rdar://problem/23137259>

[Brent Fulgham]

Our attempts to reproduce this crash on current ToT have failed. I think this was corrected by other changes we've made recently, but I can't identify what those changes are.

[Brent Fulgham]

This test case needs to be added to trunk.

[Jiewen Tan]

Created attachment 268793 [details]
Patch

[Brent Fulgham]

Comment on attachment 268793 [details]
Patch

r=me.

[WebKit Commit Bot]

Comment on attachment 268793 [details]
Patch

Clearing flags on attachment: 268793

Committed r194917: <http://trac.webkit.org/changeset/194917>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.