1615786 - Crash Report [@ mozalloc_abort | abort | rlbox::rlbox_lucet_sandbox::impl_create_sandbox ]

Status: VERIFIED FIXED

(Core :: General, defect)

Description

[Kestrel]

Tab crashes when visiting the following pages with latest Nightly 75.0a1 on Ubuntu 19.10:
https://en.wikipedia.org/wiki/Mathematics
https://en.wikipedia.org/wiki/Spacecraft
https://en.wikipedia.org/wiki/Google_Maps_(app)

Crash report:
https://crash-stats.mozilla.org/report/index/97e8aa2a-0f58-4bd7-b847-3f0a90200215

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=209112ce8f8c2dcf84b1228731f22a12c3584f97&tochange=b897758a9978f45040a93789d93f5f4175ac907b

Regressed by Bug 1610991.

Comment 1

[Shravan Narayan]

Thanks for the report! Investigating now. Unfortunately, this does not seem to repro on any of my dev machines or test servers, so it looks like its environment specific.

@Kestrel: Any chance you could run this debug build (please run from terminal) and see if you can repro the crash. If you can repro, could you post the terminal logs and crash report here?

If the above does not repro, could you try this build as well and see if you can repro the crash and send the crash report (there won't be logs in this case).

Thanks for your help!

Comment 2

[Kestrel]

The debug build crashes with the following terminal log:

Loading resource://gre/res/fonts/mathfontUnicode.properties ... Done
Error LucetRuntimeError(Unsupported("Unable to obtain host CPU extended feature info!"))!
Sandbox could not be created
Redirecting call to abort() to mozalloc_abort

I tested an Intel CPU and it didn't crash, it only crashes on AMD.

Comment 3

[Shravan Narayan]

That is extremely helpful! Thanks a bunch for testing out this build. I should have a patch within 24 hours.

Comment 4

[Shravan Narayan]

Attachment: Bug 1615786 - Fix crash report about wasm library sandbox creation on AMD machines r=froydnj

Comment 5

[Shravan Narayan]

I have a fix ready. Unfortunately, I am having a tough time repro-ing the issue --- tested on AWS instances using AMD Epyc processors, and am therefore still attempting to test the fix.

@Kestrel - Would it be possible for you see if this build does not crash on your machine? If yes, this would be extremely useful. Thanks again for your help!

Comment 6

[Kestrel]

(In reply to Shravan Narayan from comment #5)

this build does not crash on your machine?

That build is good, there is no crash or error after loading mathfontUnicode.properties like the previous debug build.

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/1c3b4cc47fc8
Fix crash report about wasm library sandbox creation on AMD machines r=froydnj

Comment 8

[Shravan Narayan]

@Kestrel - Awesome! thanks for the help!

Comment 9

[Razvan Maries]

https://hg.mozilla.org/mozilla-central/rev/1c3b4cc47fc8

Comment 10

[Kestrel]

I can verify this is fixed in latest Nightly 75.0a1 (2020-02-17). Thanks!