212214 2020-05-21 08:52:16 -0700 Serious canvas memory leak in Safari (both iOS / macOS) 2021-10-18 09:08:11 -0700 1 1 1 Unclassified WebKit Canvas Safari 13 All All NEW https://bugs.webkit.org/show_bug.cgi?id=203990 https://bugs.webkit.org/show_bug.cgi?id=134355 https://gist.github.com/kulikala/039d7c94f46ee860f1f9e2714104cb90 InRadar P2 Critical --- 1 kaz.namba webkit-unassigned cdumez davy.de.durpel dino simon.fraser webkit-bug-importer oldest_to_newest 1654935 0 399958 kaz.namba 2020-05-21 08:52:16 -0700 Created attachment 399958 An HTML code to reproduce Safari crashes because of memory leak. This issue occurs both on iOS and macOS. I attached the reproduction code, also put it on the Gist. https://gist.github.com/kulikala/039d7c94f46ee860f1f9e2714104cb90 Trigger condition is same with the following issue: https://bugs.webkit.org/show_bug.cgi?id=134355 > ctx.drawImage(anotherCanvas, clipX, clipY, clipW, clipH, x, y, w, h) --> memory leak. > ctx.drawImage(anotherCanvas, x, y, w, h) --> no memory leak. There's a slight difference with my reproduction code: the image source is switched to HTMLVideoElement. I confirmed this memory leak via Web Inspector's Timelines tab. Page category of memory instrument keeps growing and reaches 3GB (my MacBook Pro has 16GB memory). 1654996 1 ap 2020-05-21 10:53:46 -0700 Safari kills the page for using too much memory in a few seconds. 1654997 2 webkit-bug-importer 2020-05-21 10:53:57 -0700 <rdar://problem/63500557> 1655054 3 simon.fraser 2020-05-21 13:31:15 -0700 What macOS/iOS versions are you reproducing this on? 1655060 4 kaz.namba 2020-05-21 13:46:12 -0700 I confirmed the reproduction on macOS: Catalina v10.15.4 Safari: v13.1 (15609.1.20.111.8) iOS: v13.5 399958 2020-05-21 08:52:16 -0700 2020-05-21 13:30:37 -0700 An HTML code to reproduce file_212214.txt text/html 1986 kaz.namba PCFET0NUWVBFIGh0bWw+DQo8aHRtbD4NCiAgPGhlYWQ+DQogICAgPG1ldGEgY2hhcnNldD0idXRm LTgiPg0KICAgIDx0aXRsZT5TYWZhcmkgTWVtb3J5IExlYWs8L3RpdGxlPg0KICA8L2hlYWQ+DQog IDxib2R5Pg0KICAgIDxkaXYgaWQ9IndyYXBwZXIiPg0KICAgICAgPGRpdiBpZD0iY29udHJvbHMi Pg0KICAgICAgICA8YnV0dG9uIGlkPSJwbGF5Ij5QbGF5PC9idXR0b24+DQogICAgICAgIDxidXR0 b24gaWQ9InBhdXNlIj5QYXVzZTwvYnV0dG9uPg0KICAgICAgICA8bGFiZWwgZm9yPSJ0b2dnbGUi Pg0KICAgICAgICAgIDxpbnB1dCB0eXBlPSJjaGVja2JveCIgaWQ9InRvZ2dsZSI+DQogICAgICAg ICAgSW52b2tlIG1lbW9yeSBsZWFrDQogICAgICAgIDwvbGFiZWw+DQogICAgICA8L2Rpdj4NCiAg ICAgIDxkaXYgaWQ9ImNvbnRhaW5lciI+DQogICAgICAgIDxjYW52YXMgaWQ9ImNhbnZhcyI+PC9j YW52YXM+DQogICAgICA8L2Rpdj4NCiAgICA8L2Rpdj4NCg0KICAgIDxzY3JpcHQ+DQogICAgICBj b25zdCB1cmwgPSAnaHR0cHM6Ly93d3cucGV4ZWxzLmNvbS92aWRlby8yMDk4OTg5L2Rvd25sb2Fk Lz9zZWFyY2hfcXVlcnk9JnRyYWNraW5nX2lkPWFhY2U3MmJpYzJzJnc9Mzg0MCZoPTIxNjAnDQoN CiAgICAgIGNvbnN0IHZpZGVvID0gZG9jdW1lbnQuY3JlYXRlRWxlbWVudCgndmlkZW8nKQ0KDQog ICAgICB2aWRlby5zZXRBdHRyaWJ1dGUoJ3BsYXlzaW5saW5lJywgJycpDQogICAgICB2aWRlby5z ZXRBdHRyaWJ1dGUoJ3ByZWxvYWQnLCAnYXV0bycpDQogICAgICB2aWRlby5zcmMgPSB1cmwNCg0K ICAgICAgY29uc3QgY2FudmFzID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoJ2NhbnZhcycpDQog ICAgICBjb25zdCB0b2dnbGUgPSBkb2N1bWVudC5nZXRFbGVtZW50QnlJZCgndG9nZ2xlJykNCiAg ICAgIGxldCByZXF1ZXN0SWQgPSAwDQoNCiAgICAgIGRvY3VtZW50LmdldEVsZW1lbnRCeUlkKCdw bGF5JykuYWRkRXZlbnRMaXN0ZW5lcignY2xpY2snLCBhc3luYyAoKSA9PiB7DQogICAgICAgIGF3 YWl0IHZpZGVvLnBsYXkoKQ0KDQogICAgICAgIGNhbnZhcy53aWR0aCA9IHZpZGVvLnZpZGVvV2lk dGggLyA4DQogICAgICAgIGNhbnZhcy5oZWlnaHQgPSB2aWRlby52aWRlb0hlaWdodCAvIDgNCg0K ICAgICAgICBkcmF3SW1hZ2UoKQ0KICAgICAgfSkNCg0KICAgICAgZG9jdW1lbnQuZ2V0RWxlbWVu dEJ5SWQoJ3BhdXNlJykuYWRkRXZlbnRMaXN0ZW5lcignY2xpY2snLCAoKSA9PiB7DQogICAgICAg IHZpZGVvLnBhdXNlKCkNCg0KICAgICAgICBjYW5jZWxBbmltYXRpb25GcmFtZShyZXF1ZXN0SWQp DQogICAgICB9KQ0KDQogICAgICBmdW5jdGlvbiBkcmF3SW1hZ2UgKCkgew0KICAgICAgICBjb25z dCBjdHggPSBjYW52YXMuZ2V0Q29udGV4dCgnMmQnKQ0KDQogICAgICAgIGlmICh0b2dnbGUuY2hl Y2tlZCkgew0KICAgICAgICAgIGN0eC5kcmF3SW1hZ2UoDQogICAgICAgICAgICB2aWRlbywNCiAg ICAgICAgICAgIHZpZGVvLnZpZGVvV2lkdGggLyA0LCB2aWRlby52aWRlb0hlaWdodCAvIDQsDQog ICAgICAgICAgICB2aWRlby52aWRlb1dpZHRoIC8gMiwgdmlkZW8udmlkZW9IZWlnaHQgLyAyLA0K ICAgICAgICAgICAgMCwgMCwNCiAgICAgICAgICAgIGNhbnZhcy53aWR0aCwgY2FudmFzLmhlaWdo dA0KICAgICAgICAgICkNCiAgICAgICAgfSBlbHNlIHsNCiAgICAgICAgICBjdHguZHJhd0ltYWdl KA0KICAgICAgICAgICAgdmlkZW8sDQogICAgICAgICAgICAwLCAwLA0KICAgICAgICAgICAgdmlk ZW8udmlkZW9XaWR0aCwgdmlkZW8udmlkZW9IZWlnaHQsDQogICAgICAgICAgICAwLCAwLA0KICAg ICAgICAgICAgY2FudmFzLndpZHRoLCBjYW52YXMuaGVpZ2h0DQogICAgICAgICAgKQ0KICAgICAg ICB9DQoNCiAgICAgICAgcmVxdWVzdElkID0gcmVxdWVzdEFuaW1hdGlvbkZyYW1lKGRyYXdJbWFn ZSkNCiAgICAgIH0NCiAgICA8L3NjcmlwdD4NCiAgPC9ib2R5Pg0KPC9odG1sPg0K