191393 2018-11-07 12:50:16 -0800 [iOS] WebGL leaks exact GPU type 2018-11-07 15:48:19 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 dino dino bfulgham cdumez esprehn+autocc ews-watchlist graouts gyuyoung.kim jonlee kondapallykalyan thorton webkit-bug-importer oldest_to_newest 1476137 0 dino 2018-11-07 12:50:16 -0800 [iOS] WebGL leaks exact GPU type 1476138 1 dino 2018-11-07 12:50:47 -0800 <rdar://problem/45788297> 1476139 2 dino 2018-11-07 12:51:13 -0800 From the radar: WebKit Per https://dieulot.fr/idevice, it's possible to get the exact GPU model via JavaScript. This can be combined with other techniques to fingerprint users (a privacy concern). Is there any reason for websites to have access to this information? Could this string simply return "Apple GPU"? 1476145 3 354132 dino 2018-11-07 12:56:15 -0800 Created attachment 354132 Patch 1476150 4 dino 2018-11-07 13:13:20 -0800 Committed r237940: <https://trac.webkit.org/changeset/237940> 1476164 5 jonlee 2018-11-07 13:27:24 -0800 Is there a reason we are only doing this for iOS? 1476170 6 bfulgham 2018-11-07 13:31:39 -0800 (In reply to Jon Lee from comment #5) > Is there a reason we are only doing this for iOS? I think that title is wrong -- the change should apply to desktop as well. 1476172 7 thorton 2018-11-07 13:35:42 -0800 (In reply to Brent Fulgham from comment #6) > (In reply to Jon Lee from comment #5) > > Is there a reason we are only doing this for iOS? > > I think that title is wrong -- the change should apply to desktop as well. The title and the code change agree. But perhaps you mean the code change should go further? 1476195 8 bfulgham 2018-11-07 13:57:45 -0800 (In reply to Tim Horton from comment #7) > (In reply to Brent Fulgham from comment #6) > > (In reply to Jon Lee from comment #5) > > > Is there a reason we are only doing this for iOS? > > > > I think that title is wrong -- the change should apply to desktop as well. > > The title and the code change agree. But perhaps you mean the code change > should go further? Oh -- I see. This is about "case WebGLDebugRendererInfo::UNMASKED_RENDERER_WEBGL:" Under what circumstances is that active? Does the user need to take any particular action on a macOS system for such a value to be anything beside the default setting for all macOS builds? It seems like this might be an issue if you installed debug frameworks of some kind, but not for normal macOS users. Is that accurate? Or are there other things that might cause this to produce an interesting value? 1476202 9 thorton 2018-11-07 14:04:25 -0800 (In reply to Brent Fulgham from comment #8) > (In reply to Tim Horton from comment #7) > > (In reply to Brent Fulgham from comment #6) > > > (In reply to Jon Lee from comment #5) > > > > Is there a reason we are only doing this for iOS? > > > > > > I think that title is wrong -- the change should apply to desktop as well. > > > > The title and the code change agree. But perhaps you mean the code change > > should go further? > > Oh -- I see. This is about "case > WebGLDebugRendererInfo::UNMASKED_RENDERER_WEBGL:" > > Under what circumstances is that active? Does the user need to take any > particular action on a macOS system for such a value to be anything beside > the default setting for all macOS builds? > > It seems like this might be an issue if you installed debug frameworks of > some kind, but not for normal macOS users. Is that accurate? Or are there > other things that might cause this to produce an interesting value? No no, the "Debug" there isn't about debug webkit, that's the name of the web exposed API. 1476206 10 bfulgham 2018-11-07 14:06:51 -0800 (In reply to Tim Horton from comment #9) > (In reply to Brent Fulgham from comment #8) > > (In reply to Tim Horton from comment #7) > > > (In reply to Brent Fulgham from comment #6) > > > > (In reply to Jon Lee from comment #5) > > > > > Is there a reason we are only doing this for iOS? > > > > > > > > I think that title is wrong -- the change should apply to desktop as well. > > > > > > The title and the code change agree. But perhaps you mean the code change > > > should go further? > > > > Oh -- I see. This is about "case > > WebGLDebugRendererInfo::UNMASKED_RENDERER_WEBGL:" > > > > Under what circumstances is that active? Does the user need to take any > > particular action on a macOS system for such a value to be anything beside > > the default setting for all macOS builds? > > > > It seems like this might be an issue if you installed debug frameworks of > > some kind, but not for normal macOS users. Is that accurate? Or are there > > other things that might cause this to produce an interesting value? > > No no, the "Debug" there isn't about debug webkit, that's the name of the > web exposed API. Yikes! Then this change is totally needed on macOS. Jon was right! 1476292 11 dino 2018-11-07 15:48:19 -0800 (In reply to Brent Fulgham from comment #10) > Yikes! Then this change is totally needed on macOS. Jon was right! I'm not so sure. We've been shipping like this for years now. It was originally put in to allow Google Maps to better tailor their experience to particular GPUs. They unofficially told me that it was more useful on Windows, which has a wide range of hardware. However, there are people using it for macOS. I wouldn't have changed it for iOS except that there really shouldn't be any difference in iOS GPUs other than performance. 354132 2018-11-07 12:56:15 -0800 2018-11-07 13:02:38 -0800 Patch bug-191393-20181108075613.patch text/plain 7629 dino U3VidmVyc2lvbiBSZXZpc2lvbjogMjM3OTMzCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggYmIyZTAxOWY3NWYyNDAx ZjE1OWI5MjQzYmFjOGZiOGRkZTE2NTZiOS4uNmUzZDc2NWNkN2Q4Y2FjM2E0NWQzNTY5MDgwMjIw ZTE0YzY4MjQxZSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDI4IEBACisyMDE4LTExLTA3ICBEZWFu IEphY2tzb24gIDxkaW5vQGFwcGxlLmNvbT4KKworICAgICAgICBbaU9TXSBXZWJHTCBsZWFrcyBl eGFjdCBHUFUgdHlwZQorICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5j Z2k/aWQ9MTkxMzkzCisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAg ICAgICAgVGhlIGZ1bGx5IGV4cG9zZWQgcmVuZGVyZXIgaW5mbyBzaG91bGRuJ3QgYmUgbmVjZXNz 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