65174 2011-07-26 04:50:35 -0700 Accessibility stack exhaustion using role attribute 2011-08-17 14:35:08 -0700 1 1 1 Unclassified WebKit Accessibility 528+ (Nightly build) PC Windows Vista RESOLVED FIXED InRadar P1 Normal --- 1 skylined cfleizach bdakin cfleizach eric webkit.review.bot oldest_to_newest 442180 0 101987 skylined 2011-07-26 04:50:35 -0700 Created attachment 101987 Repro Repro: <label><q role=x><input> This causes a loop where AccessibilityRenderObjects create more AccessibilityRenderObjects until all stack space has been used and the thread is terminated. This requires you to enable accessibility to reproduce. 442181 1 skylined 2011-07-26 04:50:59 -0700 Chromium: https://code.google.com/p/chromium/issues/detail?id=90497 448622 2 cfleizach 2011-08-09 09:37:04 -0700 #16568 0x00000001028226ef in WebCore::AXObjectCache::getOrCreate (this=0x130276230, renderer=0x12a494dc8) at AXObjectCache.cpp:285 #16569 0x0000000102835d22 in WebCore::AccessibilityRenderObject::parentObject (this=0x1001cbe80) at AccessibilityRenderObject.cpp:443 #16570 0x000000010283bf26 in WebCore::AccessibilityRenderObject::ariaIsHidden (this=0x1001cbe80) at AccessibilityRenderObject.cpp:1702 #16571 0x0000000102828d97 in WebCore::AccessibilityRenderObject::accessibilityIsIgnoredBase (this=0x1001cbe80) at AccessibilityRenderObject.cpp:1753 #16572 0x000000010283c12f in WebCore::AccessibilityRenderObject::accessibilityIsIgnored (this=0x1001cbe80) at AccessibilityRenderObject.cpp:1775 #16573 0x000000010283bcde in WebCore::AccessibilityRenderObject::exposesTitleUIElement (this=0x1001cbe80) at AccessibilityRenderObject.cpp:1663 #16574 0x000000010283c2f9 in WebCore::AccessibilityRenderObject::accessibilityIsIgnored (this=0x1001cbb40) at AccessibilityRenderObject.cpp:1808 #16575 0x000000010282da10 in WebCore::AccessibilityObject::parentObjectUnignored (this=0x13391aab0) at AccessibilityObject.cpp:316 #16576 0x0000000102842cd6 in WebCore::AccessibilityRenderObject::determineAriaRoleAttribute (this=0x13391aab0) at AccessibilityRenderObject.cpp:3005 #16577 0x0000000102834517 in WebCore::AccessibilityRenderObject::determineAccessibilityRole (this=0x13391aab0) at AccessibilityRenderObject.cpp:3049 #16578 0x0000000102828a6d in WebCore::AccessibilityRenderObject::AccessibilityRenderObject (this=0x13391aab0, renderer=0x12a494dc8) at AccessibilityRenderObject.cpp:98 #16579 0x00000001028344cd in WebCore::AccessibilityRenderObject::AccessibilityRenderObject (this=0x13391aab0, renderer=0x12a494dc8) at AccessibilityRenderObject.cpp:97 #16580 0x0000000102834bce in WebCore::AccessibilityRenderObject::create (renderer=0x12a494dc8) at AccessibilityRenderObject.cpp:112 #16581 0x0000000102823ffd in createFromRenderer (renderer=0x12a494dc8) at AXObjectCache.cpp:250 #16582 0x00000001028226ef in WebCore::AXObjectCache::getOrCreate (this=0x130276230, renderer=0x12a494dc8) at AXObjectCache.cpp:285 448712 3 cfleizach 2011-08-09 11:54:33 -0700 rdar://9923054 448717 4 103381 cfleizach 2011-08-09 11:56:42 -0700 Created attachment 103381 patch 448720 5 webkit.review.bot 2011-08-09 12:03:19 -0700 Attachment 103381 did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/acce..." exit_code: 1 Source/WebCore/accessibility/AccessibilityRenderObject.cpp:3003: An else if statement should be written as an if statement when the prior "if" concludes with a return, break, continue or goto statement. [readability/control_flow] [4] Total errors found: 1 in 7 files If any of these errors are false positives, please file a bug against check-webkit-style. 448826 6 cfleizach 2011-08-09 14:55:08 -0700 FYI i will fix the style error on commit 452341 7 103381 darin 2011-08-17 10:34:41 -0700 Comment on attachment 103381 patch View in context: https://bugs.webkit.org/attachment.cgi?id=103381&action=review > Source/WebCore/accessibility/AccessibilityRenderObject.cpp:2999 > + AccessibilityObject* parent; > + for (parent = parentObject(); parent && !parent->accessibilityIsIgnored(); parent = parent->parentObject()) { I’d suggest defining this inside the for statement. > Source/WebCore/accessibility/AccessibilityRenderObject.cpp:3006 > + if (role == ListBoxOptionRole && parentAriaRole == MenuRole) > + return MenuItemRole; > + // An aria "menuitem" may map to MenuButton or MenuItem depending on its parent. > + else if (role == MenuItemRole && parentAriaRole == GroupRole) Yes, no need for else. 452579 8 cfleizach 2011-08-17 14:26:53 -0700 http://trac.webkit.org/changeset/93243 452595 9 cfleizach 2011-08-17 14:35:08 -0700 http://trac.webkit.org/changeset/93246 101987 2011-07-26 04:50:35 -0700 2011-07-26 04:50:35 -0700 Repro repro.html text/html 25 skylined PGxhYmVsPjxxIHJvbGU9eD48aW5wdXQ+Cg== 103381 2011-08-09 11:56:42 -0700 2011-08-17 10:34:41 -0700 patch patch.txt text/plain 8065 cfleizach SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDkyNjkzKQorKysgU291cmNlL1dlYkNvcmUvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMjIgQEAKKzIwMTEtMDgtMDkgIENocmlzIEZs ZWl6YWNoICA8Y2ZsZWl6YWNoQGFwcGxlLmNvbT4KKworICAgICAgICBBY2Nlc3NpYmlsaXR5IHN0 YWNrIGV4aGF1c3Rpb24gdXNpbmcgcm9sZSBhdHRyaWJ1dGUKKyAgICAgICAgaHR0cHM6Ly9idWdz LndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTY1MTc0CisKKyAgICAgICAgTWFrZSBzdXJlIHdl 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