218132 2020-10-23 11:51:38 -0700 Null dereference in CompositeEditCommand::cloneParagraphUnderNewElement() due to not checking for top of DOM tree 2020-10-28 22:33:06 -0700 1 1 1 Unclassified WebKit HTML Editing WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 julian_a_gonzalez webkit-unassigned bfulgham ews-feeder product-security rniwa webkit-bug-importer wenson_hsieh oldest_to_newest 1701099 0 julian_a_gonzalez 2020-10-23 11:51:38 -0700 e.g. #0 0x2d60df731 in WebCore::Node::parentNode() const+0x21 #1 0x2da279932 in WebCore::CompositeEditCommand::cloneParagraphUnderNewElement(WebCore::Position const&, WebCore::Position const&, WebCore::Node*, WebCore::Element*)+0x882 #2 0x2da27a567 in WebCore::CompositeEditCommand::moveParagraphWithClones(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&, WebCore::Element*, WebCore::Node*)+0x327 #3 0x2da309ced in WebCore::IndentOutdentCommand::indentIntoBlockquote(WebCore::Position const&, WebCore::Position const&, WTF::RefPtr<WebCore::Element, WTF::DumbPtrTraits<WebCore::Element>, WTF::DefaultRefDerefTraits<WebCore::Element> >&)+0x53d #4 0x2da30b75c in WebCore::IndentOutdentCommand::formatRange(WebCore::Position const&, WebCore::Position const&, WebCore::Position const&, WTF::RefPtr<WebCore::Element, WTF::DumbPtrTraits<WebCore::Element>, WTF::DefaultRefDerefTraits<WebCore::Element> >&)+0x3c #5 0x2da256c41 in WebCore::ApplyBlockElementCommand::formatSelection(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&)+0xca1 #6 0x2da30b706 in WebCore::IndentOutdentCommand::formatSelection(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&)+0x36 #7 0x2da255a99 in WebCore::ApplyBlockElementCommand::doApply()+0x459 #8 0x2da2545c6 in WebCore::CompositeEditCommand::apply()+0x216 #9 0x2da313828 in WebCore::executeIndent(WebCore::Frame&, WebCore::Event*, WebCore::EditorCommandSource, WTF::String const&)+0xc8 #10 0x2da2d8d9b in WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const+0xdb #11 0x2d9f61aa3 in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&)+0xf3 #12 0x2d7480189 in WebCore::jsDocumentPrototypeFunction_execCommandBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDocument*)+0x469 #13 0x2d732884b in long long WebCore::IDLOperation<WebCore::JSDocument>::call<&(WebCore::jsDocumentPrototypeFunction_execCommandBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDocument*)), (WebCore::CastedThisErrorBehavior)0>(JSC::JSGlobalObject&, JSC::CallFrame&, char const*)+0xfb #14 0x2d7328748 in WebCore::jsDocumentPrototypeFunction_execCommand(JSC::JSGlobalObject*, JSC::CallFrame*)+0x8 <rdar://problem/66894117> Null Ptr Deref @ WebCore::Node::parentNode const+0 1701101 1 webkit-bug-importer 2020-10-23 11:51:52 -0700 <rdar://problem/70628729> 1701116 2 412205 julian_a_gonzalez 2020-10-23 12:28:42 -0700 Created attachment 412205 Patch 1701587 3 412348 julian_a_gonzalez 2020-10-26 13:21:06 -0700 Created attachment 412348 Patch 1701742 4 412383 rniwa 2020-10-26 20:36:12 -0700 Created attachment 412383 Reduced test case 1702123 5 julian_a_gonzalez 2020-10-27 15:10:48 -0700 Thanks for the new test case! I will incorporate it into my patch - it should hopefully eliminate the test failure I see here (which I cannot reproduce locally). 1702134 6 412471 julian_a_gonzalez 2020-10-27 15:49:15 -0700 Created attachment 412471 Patch 1702627 7 ews-feeder 2020-10-28 22:26:14 -0700 Committed r269137: <https://trac.webkit.org/changeset/269137> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412471. 1702629 8 rniwa 2020-10-28 22:33:06 -0700 There is no security implication here. 412205 2020-10-23 12:28:42 -0700 2020-10-26 13:21:04 -0700 Patch bug-218132-20201023122841.patch text/plain 2560 julian_a_gonzalez U3VidmVyc2lvbiBSZXZpc2lvbjogMjY4ODIyCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggNGM4M2RhYzI1NzlmMjJk ODA0ZTAxYzUyM2Q2YjkwYWZhZGU0MzRkOS4uNmZiMzdjMjRhYjJjMzM3Y2Y4MjMwYTY2NDJmMzE5 ZDQ4NWQ3Y2Q3NiAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDE3IEBACisyMDIwLTEwLTIzICBKdWxp YW4gR29uemFsZXogIDxqdWxpYW5fYV9nb256YWxlekBhcHBsZS5jb20+CisKKyAgICAgICAgTnVs bCBkZXJlZmVyZW5jZSBpbiBDb21wb3NpdGVFZGl0Q29tbWFuZDo6Y2xvbmVQYXJhZ3JhcGhVbmRl ck5ld0VsZW1lbnQoKSBkdWUgdG8gbm90IGNoZWNraW5nIGZvciB0b3Agb2YgRE9NIHRyZWUKKyAg ICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTIxODEzMgorCisg 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