21063 2008-09-24 10:01:21 -0700 NULL pointer crash in dispatchEvent(null); 2008-11-29 14:34:05 -0800 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) All All RESOLVED FIXED P1 Normal --- 1 deanm webkit-unassigned ap mihnea sam skylined oldest_to_newest 92545 0 deanm 2008-09-24 10:01:21 -0700 We found this a while ago, looks like it never got filed: var xhr = new XMLHttpRequest(); xhr.dispatchEvent(null); I don't have a mac, or a webkit build where I can test and make a layout test. However, it should be trivial to turn the above into a layout test, and apply and test this patch: diff --git a/WebCore/xml/XMLHttpRequest.cpp b/WebCore/xml/XMLHttpRequest.cpp index 4b4bc96..0303d01 100644 --- a/WebCore/xml/XMLHttpRequest.cpp +++ b/WebCore/xml/XMLHttpRequest.cpp @@ -309,7 +309,7 @@ void XMLHttpRequest::removeEventListener(const AtomicString& bool XMLHttpRequest::dispatchEvent(PassRefPtr<Event> evt, ExceptionCode& ec, bo { // FIXME: check for other error conditions enumerated in the spec. - if (evt->type().isEmpty()) { + if (!evt || evt->type().isEmpty()) { ec = EventException::UNSPECIFIED_EVENT_TYPE_ERR; return true; } 92720 1 ap 2008-09-25 08:21:18 -0700 We seem to have the same issue in other dispatchEvent() implementations (why are there so many?). E.g. XMLHttpRequestUpload::dispatchEvent, DOMApplicationCache::dispatchEvent, MessagePort::dispatchEvent. 92761 2 sam 2008-09-25 11:10:04 -0700 (In reply to comment #1) > We seem to have the same issue in other dispatchEvent() implementations (why > are there so many?). E.g. XMLHttpRequestUpload::dispatchEvent, > DOMApplicationCache::dispatchEvent, MessagePort::dispatchEvent. Anders and I just discussed this yesterday. The functions seem generic enough that we should be able to factor them up to EventTarget (or elsewhere). 100146 3 deanm 2008-11-24 20:51:24 -0800 Any word on this? Could we check in the simple NULL checks for now until it gets refactored? 100177 4 ap 2008-11-25 00:10:10 -0800 Yes. Would you be willing to make a patch with test cases? 100733 5 25601 sam 2008-11-29 14:06:18 -0800 Created attachment 25601 patch 100734 6 25601 ap 2008-11-29 14:09:48 -0800 Comment on attachment 25601 patch r=me 100739 7 sam 2008-11-29 14:34:05 -0800 Fixed in r38845. 25601 2008-11-29 14:06:18 -0800 2008-11-29 14:09:48 -0800 patch patch.diff text/plain 7787 sam SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiAzODg0MykKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMjYgQEAKKzIwMDgtMTEtMjggIFNhbSBXZWluaWcgIDxzYW1Ad2Via2l0Lm9yZz4K KworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBGaXggZm9y IGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0yMTA2MworICAgICAgICBO VUxMIHBvaW50ZXIgY3Jhc2ggaW4gZGlzcGF0Y2hFdmVudChudWxsKTsKKworICAgICAgICBUZXN0 OiBmYXN0L2V2ZW50cy9kaXNwYXRjaEV2ZW50LWNyYXNoLmh0bWwKKworICAgICAgICAqIFdlYkNv 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