Crash while interacting with sketchfab.com webgl content

• Component: WebGL
• Status: RESOLVED CONFIGURATION CHANGED

on 14.5.1

- goto https://sketchfab.com/3d-models/cube-test-442c548d94744641ba279ae94b5f45ec
- ping zoom - uzoom a few time
- browser crash "a problem occured on https://sketchfab.com/3d-models/cube-test-442c548d94744641ba279ae94b5f45ec"

[Kimmo Kinnunen]

Thanks for the report.
I could not immediately repro the issue.

My steps using iPhone 11 and 12:
- navigated to the site
- pinch zoomed around, doubletap zoomed around

If you have time, please specify:
- The device used?
- Frequency: deterministic or sometimes?

If you have more time and a Mac, you could see if you can obtain the crash log from ~/Library/Logs/CrashReporter/MobileDevice/ . It can be populated by syncing the device through Finder.

[James]

Created attachment 430477 [details]
video of crash

[James]

Created attachment 430479 [details]
crash log

[James]

Hello,

I'm using an iPhone 8 Plus, running iOS 14.5.1.

I can reproduce the crash very consistently. In my experiencing, pinch/zooming on any website with a Sketchfab iframe embedded (with the render running) will cause the crash. It doesn't seem related to the complexity of the render or the website where it's embedded. That cube sample is about as simple as it gets ( https://sketchfab.com/3d-models/cube-test-442c548d94744641ba279ae94b5f45ec ).

I've attached a video showing the issue. It took several zooms to happen, but sometimes less.

I've also attached the crash log. Let me know if that's not the right file.

[Kenneth Russell]

Sketchfab's a major WebGL site so raising this to P1, Major priority. Could one of the Apple engineers please try to reproduce this on a device?

If there's a way for developers external to Apple to deploy and test WebKit builds on-device that would be fantastic.

[Alexey Proskuryakov]

I can easily reproduce on iPhone 12 Pro with a recent WebKit.

Couldn't find the applicable report on my device for some reason, but given the repro steps (it's pinch zooming the whole webpage, not inside the WebGL canvas), this can only be a generic case of running out of memory. The attached log also looks like a low memory event.

[Radar WebKit Bug Importer]

<rdar://problem/79076476>

[Brent Fulgham]

QA indicates this is now progressed from other GL work this cycle.