225235 2021-04-30 09:21:34 -0700 Crash in ApplyStyleCommand::applyRelativeFontStyleChange 2021-05-07 08:24:01 -0700 1 1 1 Unclassified WebKit HTML Editing WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=223974 InRadar P2 Normal --- 1 ajuma fred.wang bfulgham ews-feeder ews-watchlist fred.wang mifenton product-security rniwa rohitrao webkit-bug-importer wenson_hsieh oldest_to_newest 1755712 0 427430 ajuma 2021-04-30 09:21:34 -0700 Created attachment 427430 Minimal test case Filing this as a security bug since it was found using a fuzzer; there's no disclosure deadline for this bug. This reproduces in an ASan build of WebKitTestRunner, and also in STP 123. Stack: ================================================================= ==29379==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000018 (pc 0x0005c83e7854 bp 0x7ffee1561650 sp 0x7ffee1561650 T0) ==29379==The signal is caused by a WRITE memory access. ==29379==Hint: address points to the zero page. #0 0x5c83e7853 in WTF::Ref<WebCore::Node, WTF::RawPtrTraits<WebCore::Node> >::Ref(WebCore::Node&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x484853) #1 0x5cb7df0bf in WebCore::ApplyStyleCommand::applyRelativeFontStyleChange(WebCore::EditingStyle*) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x387c0bf) #2 0x5cb7dda06 in WebCore::ApplyStyleCommand::doApply() (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x387aa06) #3 0x5cb7d80c4 in WebCore::CompositeEditCommand::apply() (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x38750c4) #4 0x5cb84ea01 in WebCore::Editor::applyStyle(WTF::RefPtr<WebCore::EditingStyle, WTF::RawPtrTraits<WebCore::EditingStyle>, WTF::DefaultRefDerefTraits<WebCore::EditingStyle> >&&, WebCore::EditAction, WebCore::Editor::ColorFilterMode) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x38eba01) #5 0x5cb897175 in WebCore::applyCommandToFrame(WebCore::Frame&, WebCore::EditorCommandSource, WebCore::EditAction, WTF::Ref<WebCore::EditingStyle, WTF::RawPtrTraits<WebCore::EditingStyle> >&&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3934175) #6 0x5cb897016 in WebCore::executeApplyStyle(WebCore::Frame&, WebCore::EditorCommandSource, WebCore::EditAction, WebCore::CSSPropertyID, WTF::String const&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3934016) #7 0x5cb4f96a3 in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x35966a3) #8 0x5c894120a in WebCore::jsDocumentPrototypeFunction_execCommandBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDocument*) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x9de20a) #9 0x5c8940ccb 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*) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x9ddccb) #10 0x24a3a7a011d7 (<unknown module>) #11 0x5e4a307df in llint_entry (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0xb4e7df) #12 0x5e4a307df in llint_entry (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0xb4e7df) #13 0x5e4a157f8 in vmEntryToJavaScript (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0xb337f8) #14 0x5e61b9c61 in JSC::Interpreter::executeProgram(JSC::SourceCode const&, JSC::JSGlobalObject*, JSC::JSObject*) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x22d7c61) #15 0x5e68fa7ed in JSC::evaluate(JSC::JSGlobalObject*, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x2a187ed) #16 0x5e68faa97 in JSC::profiledEvaluate(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x2a18a97) #17 0x5cae12bb9 in WebCore::JSExecState::profiledEvaluate(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x2eafbb9) #18 0x5cae123b9 in WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x2eaf3b9) #19 0x5cae11fad in WebCore::ScriptController::evaluateInWorldIgnoringException(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x2eaefad) #20 0x5cb6f93f7 in WebCore::ScriptElement::executeClassicScript(WebCore::ScriptSourceCode const&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x37963f7) #21 0x5cb6f65eb in WebCore::ScriptElement::prepareScript(WTF::TextPosition const&, WebCore::ScriptElement::LegacyTypeSupport) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x37935eb) #22 0x5cbe3196e in WebCore::HTMLScriptRunner::runScript(WebCore::ScriptElement&, WTF::TextPosition const&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ece96e) #23 0x5cbe31644 in WebCore::HTMLScriptRunner::execute(WTF::Ref<WebCore::ScriptElement, WTF::RawPtrTraits<WebCore::ScriptElement> >&&, WTF::TextPosition const&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ece644) #24 0x5cbe0a449 in WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder() (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ea7449) #25 0x5cbe0aa8d in WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ea7a8d) #26 0x5cbe09b2b in WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ea6b2b) #27 0x5cbe09f9d in WebCore::HTMLDocumentParser::resumeParsingAfterYield() (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x3ea6f9d) #28 0x5cc8aa4a4 in WebCore::ThreadTimers::sharedTimerFiredInternal() (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x49474a4) #29 0x5cc934109 in WebCore::timerFired(__CFRunLoopTimer*, void*) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebCore.framework/Versions/A/WebCore:x86_64+0x49d1109) #30 0x7fff31204467 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64+0x9f467) #31 0x7fff31203fcd in __CFRunLoopDoTimer (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64+0x9efcd) #32 0x7fff31203ab8 in __CFRunLoopDoTimers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64+0x9eab8) #33 0x7fff311e870c in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64+0x8370c) #34 0x7fff311e7952 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64+0x82952) #35 0x7fff338a51c7 in -[NSRunLoop(NSRunLoop) runMode:beforeDate:] (/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation:x86_64+0x601c7) #36 0x7fff33957c6e in -[NSRunLoop(NSRunLoop) run] (/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation:x86_64+0x112c6e) #37 0x7fff6b3c44e9 in _xpc_objc_main.cold.4 (/usr/lib/system/libxpc.dylib:x86_64+0x164e9) #38 0x7fff6b3c442f in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x1642f) #39 0x7fff6b3c3f62 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0x15f62) #40 0x5b8f119f3 in WebKit::XPCServiceMain(int, char const**) (/Users/chrome-bot/clusterfuzz/bot/builds/chrome-ios-webkit-to-fuzz_ios-webkit-to-fuzz_cb292771138f3c7c4bb12f2df778e2b1c42b4cd7/revisions/WebKitMacOS/WebKit.framework/Versions/A/WebKit:x86_64+0xf119f3) #41 0x7fff6b172cc8 in start (/usr/lib/system/libdyld.dylib:x86_64+0x1acc8) ==29379==Register values: rax = 0x0000100000000000 rbx = 0x00007ffee1561aa0 rcx = 0x0000100000000003 rdx = 0x0000000000000003 rdi = 0x00007ffee1561860 rsi = 0x0000000000000018 rbp = 0x00007ffee1561650 rsp = 0x00007ffee1561650 r8 = 0x0000000000000001 r9 = 0x0000000000000000 r10 = 0xffffffffffffffff r11 = 0x00000fffffffffff r12 = 0x00007ffee1561840 r13 = 0x00001fffdc2ac310 r14 = 0x00007ffee1561860 r15 = 0x00001fffdc2ac2cc ========================= Clusterfuzz-id: 5723658426056704 1755714 1 webkit-bug-importer 2021-04-30 09:21:44 -0700 <rdar://problem/77385816> 1755919 2 rniwa 2021-04-30 21:14:22 -0700 Frédéric, is this a duplicate of the bug 223974? 1756120 3 fred.wang 2021-05-03 02:06:32 -0700 (In reply to Ryosuke Niwa from comment #2) > Frédéric, is this a duplicate of the bug 223974? The pacth there does not fix it and the assertion failure seems different. Will take a look. 1756136 4 427548 fred.wang 2021-05-03 03:19:10 -0700 Created attachment 427548 testcase reduced a bit further 1756180 5 fred.wang 2021-05-03 08:06:42 -0700 (In reply to Frédéric Wang (:fredw) from comment #3) > The pacth there does not fix it and the assertion failure seems different. > Will take a look. Actually it's the same debug assertion https://webkit-search.igalia.com/webkit/rev/d6c003baa462e89279b24c5ebfe160082a97997e/Source/WebCore/editing/ApplyStyleCommand.cpp#384 but the reason is different. start/end are both pointing to the body with offsets 2 and 4 respectively, so we have start < end. The inversion of nodes happens at https://webkit-search.igalia.com/webkit/rev/d6c003baa462e89279b24c5ebfe160082a97997e/Source/WebCore/editing/ApplyStyleCommand.cpp#345 where "beyondEnd = NodeTraversal::next(*end.deprecatedNode());" moves to the DIV child while "start = start.upstream();" moves to the #text child. I'm not sure why we use two different functions? (rr) b Source/WebCore/editing/ApplyStyleCommand.cpp:356 (rr) rc (rr) Thread 1 hit Breakpoint 1, WebCore::ApplyStyleCommand::applyRelativeFontStyleChange (this=0x7fde709b7bc0, style=0x7fde709a3cf0) at https://webkit-search.igalia.com/webkit/rev/d6c003baa462e89279b24c5ebfe160082a97997e/Source/WebCore/editing/ApplyStyleCommand.cpp#356 (rr) p showTree(start) *BODY 0x7fdebab08010 (renderer 0x7fdebab11b40) STYLE=-webkit-text-security: disc; DIV 0x7fdebab08110 (renderer 0x7fdebab08640) #text 0x7fdebab09330 "B\n " SCRIPT 0x7fdebab093a0 (renderer (nil)) #text 0x7fdebab080a0 "\n document.body.insertBefore(document.createElement("div"),\n document.body.firstChild);\n document.execCommand("FontSizeDelta", false, 3);\n " offset, offset:2 $1 = void (rr) p showTree(end) *BODY 0x7fdebab08010 (renderer 0x7fdebab11b40) STYLE=-webkit-text-security: disc; DIV 0x7fdebab08110 (renderer 0x7fdebab08640) #text 0x7fdebab09330 "B\n " SCRIPT 0x7fdebab093a0 (renderer (nil)) #text 0x7fdebab080a0 "\n document.body.insertBefore(document.createElement("div"),\n document.body.firstChild);\n document.execCommand("FontSizeDelta", false, 3);\n " offset, offset:4 $2 = void (rr) p showTree(&*beyondEnd) BODY 0x7fdebab08010 (renderer 0x7fdebab11b40) STYLE=-webkit-text-security: disc; * DIV 0x7fdebab08110 (renderer 0x7fdebab08640) #text 0x7fdebab09330 "B\n " SCRIPT 0x7fdebab093a0 (renderer (nil)) #text 0x7fdebab080a0 "\n document.body.insertBefore(document.createElement("div"),\n document.body.firstChild);\n document.execCommand("FontSizeDelta", false, 3);\n " $3 = void (rr) n (rr) p showTree(start) BODY 0x7fdebab08010 (renderer 0x7fdebab11b40) STYLE=-webkit-text-security: disc; DIV 0x7fdebab08110 (renderer 0x7fdebab08640) * #text 0x7fdebab09330 "B\n " SCRIPT 0x7fdebab093a0 (renderer (nil)) #text 0x7fdebab080a0 "\n document.body.insertBefore(document.createElement("div"),\n document.body.firstChild);\n document.execCommand("FontSizeDelta", false, 3);\n " legacy, offset, offset:4 $4 = void 1756252 6 427582 fred.wang 2021-05-03 11:47:56 -0700 Created attachment 427582 experimental patch This ensures beyondEnd is moved to the next node, if the start & end have the same anchor node. I don't know if this is what we want or not, I'm uploading it to see whether it causes any test failures on EWS. (In any case when the anchor node is the same, using NodeTraversal::next() on the end's anchor node and Position::upstream() on the selection start seems wrong) 1756399 7 427582 rniwa 2021-05-03 18:11:43 -0700 Comment on attachment 427582 experimental patch View in context: https://bugs.webkit.org/attachment.cgi?id=427582&action=review It doesn't seem like this is a security issue? Can we add a test? > Source/WebCore/editing/ApplyStyleCommand.cpp:351 > + if (start.deprecatedNode() == end.deprecatedNode() || start.deprecatedNode()->isDescendantOf(*end.deprecatedNode())) Sounds like we want to do do: end.deprecatedNode()->contains(*start.deprecatedNode())? 1756455 8 427641 fred.wang 2021-05-04 00:05:00 -0700 Created attachment 427641 Patch (In reply to Ryosuke Niwa from comment #7) > It doesn't seem like this is a security issue? Can we add a test? Yes, the first loop will crash with a nullptr dereference when reaching the end of the DOM tree, similar to the debug assert. Here is a new version, including a test. Unfortunately, I was not able to reduce it much. 1756492 9 427649 fred.wang 2021-05-04 03:52:56 -0700 Created attachment 427649 Patch 1757519 10 427649 rniwa 2021-05-06 11:21:28 -0700 Comment on attachment 427649 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=427649&action=review > LayoutTests/editing/execCommand/font-size-delta-same-node-for-start-and-end-crash.html:19 > + document.body.insertBefore(document.createElement("div"), > + document.body.firstChild); Nit: wrong indentation. Our indentation is always 4 spaces. 1757520 11 427649 rniwa 2021-05-06 11:22:05 -0700 Comment on attachment 427649 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=427649&action=review > LayoutTests/editing/execCommand/font-size-delta-same-node-for-start-and-end-crash.html:1 > +<body style="-webkit-text-security: disc;"> Do we really need this? 1757525 12 427649 fred.wang 2021-05-06 11:27:52 -0700 Comment on attachment 427649 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=427649&action=review >> LayoutTests/editing/execCommand/font-size-delta-same-node-for-start-and-end-crash.html:1 >> +<body style="-webkit-text-security: disc;"> > > Do we really need this? Crash does not happen without that (I think it's creating text nodes). In general I was not really able to reduce further. 1757527 13 rniwa 2021-05-06 11:29:19 -0700 (In reply to Frédéric Wang (:fredw) from comment #12) > Comment on attachment 427649 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=427649&action=review > > >> LayoutTests/editing/execCommand/font-size-delta-same-node-for-start-and-end-crash.html:1 > >> +<body style="-webkit-text-security: disc;"> > > > > Do we really need this? > > Crash does not happen without that (I think it's creating text nodes). In > general I was not really able to reduce further. Okay. Interesting. I wonder how that CSS rule is affecting the editing code... 1757805 14 427977 fred.wang 2021-05-07 00:51:18 -0700 Created attachment 427977 Patch for landing 1757870 15 ews-feeder 2021-05-07 08:23:59 -0700 Committed r277174 (237460@main): <https://commits.webkit.org/237460@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 427977. 427430 2021-04-30 09:21:34 -0700 2021-04-30 09:21:34 -0700 Minimal test case applyRelativeFontStyleChange.html text/html 1383 ajuma IDwvaGVhZD48Ym9keSAiX19mXzM4NSgpOyIgc3R5bGU9ImRpc3BsYXk6IC13ZWJraXQtaW5saW5l LWJveDstd2Via2l0LWNvbHVtbi1ydWxlOiAzcHggc29saWQ7b3ZlcmZsb3ctaW5saW5lOiBzY3Jv bGw7LXdlYmtpdC10ZXh0LXNlY3VyaXR5OiBkaXNjO2RvbWluYW50LWJhc2VsaW5lOiBuby1jaGFu Z2U7Zm9udC1mYWNlOiBBcmlhbCI+CiAgPHNjcmlwdD48L3NjcmlwdD48ImJvcmRlci1pbmxpbmUt c3RhcnQtY29sb3I6IG9yYW5nZTtqdXN0aWZ5LWl0ZW1zOiBiYXNlbGluZTttc28tZ2VuZXJpYy1m b250LWZhbWlseTogYXV0bzt0ZXh0LXJlbmRlcmluZzogb3B0aW1pemVMZWdpYmlsaXR5O3BsYWNl LXNlbGY6IHN0YXJ0IGJhc2VsaW5lIj48L3A+CiAgICAgICAgX192XzE0My5wb3N0TWVzc2FnZSht c2cpOwogIDxzY3JpcHQ+CiAgICBmdW5jdGlvbiBfX2ZfMjM4KCB0YWdOYW1lKQogICAgewogICAg ICAgIF9fdl8yNjQgPSBkb2N1bWVudC5jcmVhdGVFbGVtZW50KHRhZ05hbWUpOwogICAgICAgIHZh ciBfX3ZfMjQ4ID0gZG9jdW1lbnQuYm9keSB8fCBkb2N1bWVudC5kb2N1bWVudEVsZW1lbnQ7CiAg 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