226640 2021-06-04 05:12:55 -0700 FileReader.readAsArrayBuffer misses checking for the type of blob param 2021-06-16 12:58:44 -0700 1 1 1 Unclassified WebKit WebCore Misc. WebKit Local Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 zyscoder cdumez achristensen aestes bugs-noreply cdumez darin esprehn+autocc ews-watchlist ggaren kondapallykalyan mcatanzaro rniwa sam webkit-bug-importer youennf oldest_to_newest 1766741 0 zyscoder 2021-06-04 05:12:55 -0700 Steps to reproduce: (1) Open a tab and navigate to any URL; (2) Run the following code in the Console of Devtools: ``` new FileReader().readAsArrayBuffer(undefined); ``` (3) Then this code would be evaluated successfully without throwing any exception. Actual results: This code is evaluated successfully without throwing any exception. Expected results: FileReader.readAsArrayBuffer asks a Blob type object as its parameter, but Webkit doesn't check the type of the param in this code. A TypeError should be thrown in this code. BTW, both Chrome and Firefox throw exceptions: Chrome: `VM1217:1 Uncaught TypeError: Failed to execute 'readAsArrayBuffer' on 'FileReader': parameter 1 is not of type 'Blob'.` Firefox: `Uncaught TypeError: FileReader.readAsArrayBuffer: Argument 1 is not an object.` 1766747 1 mcatanzaro 2021-06-04 06:49:54 -0700 Hi, please don't use the WebKitGTK component for these general web content bugs. It's for known or suspected platform-specific issues only. You can use the Hardware field to indicate that you're using Linux. 1768911 2 webkit-bug-importer 2021-06-11 05:13:18 -0700 <rdar://problem/79193198> 1770282 3 431567 cdumez 2021-06-16 11:07:48 -0700 Created attachment 431567 WIP Patch 1770324 4 431583 cdumez 2021-06-16 12:01:19 -0700 Created attachment 431583 Patch 1770333 5 431583 youennf 2021-06-16 12:25:32 -0700 Comment on attachment 431583 Patch Strange that we do not have any WPT test 1770337 6 cdumez 2021-06-16 12:43:57 -0700 (In reply to youenn fablet from comment #5) > Comment on attachment 431583 [details] > Patch > > Strange that we do not have any WPT test Indeed. I'll resync the WPT tests in a follow-up as we seem a bit out of sync. 1770347 7 ews-feeder 2021-06-16 12:58:39 -0700 Committed r278951 (238880@main): <https://commits.webkit.org/238880@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 431583. 431567 2021-06-16 11:07:48 -0700 2021-06-16 12:01:16 -0700 WIP Patch 226640_FileReader_wip.patch text/plain 4609 cdumez ZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJDb3JlL2ZpbGVhcGkvRmlsZVJlYWRlci5jcHAgYi9Tb3Vy Y2UvV2ViQ29yZS9maWxlYXBpL0ZpbGVSZWFkZXIuY3BwCmluZGV4IGZiZWUwNzJhNWI5MS4uYmMw NmRiNWRiN2QwIDEwMDY0NAotLS0gYS9Tb3VyY2UvV2ViQ29yZS9maWxlYXBpL0ZpbGVSZWFkZXIu Y3BwCisrKyBiL1NvdXJjZS9XZWJDb3JlL2ZpbGVhcGkvRmlsZVJlYWRlci5jcHAKQEAgLTg5LDQ1 ICs4OSwzMyBAQCBib29sIEZpbGVSZWFkZXI6OnZpcnR1YWxIYXNQZW5kaW5nQWN0aXZpdHkoKSBj b25zdAogICAgIHJldHVybiBtX3N0YXRlID09IExPQURJTkc7CiB9CiAKLUV4Y2VwdGlvbk9yPHZv aWQ+IEZpbGVSZWFkZXI6OnJlYWRBc0FycmF5QnVmZmVyKEJsb2IqIGJsb2IpCitFeGNlcHRpb25P cjx2b2lkPiBGaWxlUmVhZGVyOjpyZWFkQXNBcnJheUJ1ZmZlcihCbG9iJiBibG9iKQogewotICAg IGlmICghYmxvYikKLSAgICAgICAgcmV0dXJuIHsgfTsKKyAgICBMT0coRmlsZUFQSSwgIkZpbGVS ZWFkZXI6IHJlYWRpbmcgYXMgYXJyYXkgYnVmZmVyOiAlcyAlc1xuIiwgYmxvYi51cmwoKS5zdHJp 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