Bug 215835 – REGRESSION (r264661): Crashes in WebCore::wrap<WebCore::Blob> in CloneDeserializer

• Component: WebKit Misc.
• Status: RESOLVED FIXED

Created attachment 407268 [details]
The property inspector of XCode when the crash happens.

commit in 7/22 in SerializedScriptValue.cpp result in crash.

!m_isDOMGlobalObject and m_isJSIDBSerializationGlobalObject are not equal. Cause a crash in a type checking.


Build Date & Hardware:
Build 2020-08-25 on Mac OS 10.15.4

run and debug in iOS 14 beta 5 simulator.

[Alexey Proskuryakov]

The closest change to this file r264661, although that was 7/21 in California. Is this what you are blaming?

Could you please attach a complete crash log, and/or steps to reproduce?

Created attachment 407373 [details]
crashreport

(In reply to Alexey Proskuryakov from comment #1)
> The closest change to this file r264661, although that was 7/21 in
> California. Is this what you are blaming?
> 
> Could you please attach a complete crash log, and/or steps to reproduce?

Yes, r264661 is the change I'm talking about.
Sorry, but I can only provide part of the crash log.See crashreport in Attachments.

[Alexey Proskuryakov]

Thank you for the confirmation. 

We cannot symbolicate a partial crash report, and this may not be actionable without a symbolicated trace, or better, a repro case. 

Keeping open in case Sihui has an idea.

Created attachment 407597 [details]
symbolicated crash report

(In reply to Alexey Proskuryakov from comment #4)
> Thank you for the confirmation. 
> 
> We cannot symbolicate a partial crash report, and this may not be actionable
> without a symbolicated trace, or better, a repro case. 
> 
> Keeping open in case Sihui has an idea.

Hi, we managed to get symbolicated crash report. Would you please take a look at it ? thanks. :-)

[Alexey Proskuryakov]

Thank you! I think that this may be enough info for an investigation.

Any details tat could help prioritization would also be appreciated (such as user impact qualification).

[Alexey Proskuryakov]

rdar://problem/68084639

[Sihui Liu]

Created attachment 407695 [details]
Patch

[Alexey Proskuryakov]

Comment on attachment 407695 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=407695&action=review

> Source/WebCore/ChangeLog:3
> +        REGRESSION (r264661): Crashes in WebCore::wrap<WebCore::Blob> in CloneDeserializer

Can a regression test be added for this?

[Sihui Liu]

Created attachment 407721 [details]
Patch

[Sihui Liu]

(In reply to Alexey Proskuryakov from comment #10)
> Comment on attachment 407695 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=407695&action=review
> 
> > Source/WebCore/ChangeLog:3
> > +        REGRESSION (r264661): Crashes in WebCore::wrap<WebCore::Blob> in CloneDeserializer
> 
> Can a regression test be added for this?

Test added.

[youenn fablet]

Comment on attachment 407721 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=407721&action=review

> Source/WebCore/bindings/js/SerializedScriptValue.cpp:2042
> +        , m_isValidDOMGlobalObject(m_isDOMGlobalObject && !globalObject->inherits<JSIDBSerializationGlobalObject>(globalObject->vm()))

I would rename it to something like m_canCreateDOMObject.

[Sihui Liu]

Created attachment 407772 [details]
Patch for landing

[EWS]

Committed r266470: <https://trac.webkit.org/changeset/266470>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 407772 [details].