[iOS][WP] Restrict image decoders

[Per Arne Vollan]

Restrict image decoders in order to enable further sandbox strengthening.

[Per Arne Vollan]

Created attachment 446815 [details]
Patch

[Per Arne Vollan]

Created attachment 446980 [details]
Patch

[Per Arne Vollan]

Created attachment 446983 [details]
Patch

[Radar WebKit Bug Importer]

<rdar://problem/86650455>

[Brent Fulgham]

Comment on attachment 446983 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=446983&action=review

r=me

> Source/WebKit/UIProcess/Cocoa/WebProcessPoolCocoa.mm:-451
> -        parameters.videoDecoderExtensionHandles = SandboxExtension::createHandlesForMachLookup({ "com.apple.coremedia.decompressionsession"_s }, std::nullopt);

Nice!

[Per Arne Vollan]

Created attachment 450338 [details]
Patch

[Per Arne Vollan]

Comment on attachment 450338 [details]
Patch

Thanks for reviewing!

[EWS]

Committed r288817 (246593@main): <https://commits.webkit.org/246593@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 450338 [details].

[Simon Fraser (smfr)]

Comment on attachment 450338 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=450338&action=review

> Source/WebKit/Shared/WebProcessCreationParameters.cpp:484
> +    parameters.restrictImageAndVideoDecoders = WTFMove(*restrictImageAndVideoDecoders);

Not necessary to WTFMove a bool

> Source/WebKit/Shared/WebProcessCreationParameters.h:207
>      Vector<SandboxExtension::Handle> videoDecoderExtensionHandles;

Should this be #if PLATFORM(MAC) now?

[Per Arne Vollan]

(In reply to Simon Fraser (smfr) from comment #9)
> Comment on attachment 450338 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=450338&action=review
> 
> > Source/WebKit/Shared/WebProcessCreationParameters.cpp:484
> > +    parameters.restrictImageAndVideoDecoders = WTFMove(*restrictImageAndVideoDecoders);
> 
> Not necessary to WTFMove a bool
> 
> > Source/WebKit/Shared/WebProcessCreationParameters.h:207
> >      Vector<SandboxExtension::Handle> videoDecoderExtensionHandles;
> 
> Should this be #if PLATFORM(MAC) now?

Yes, that is a very good point; I'll upload a follow-up patch.

Thanks for reviewing!

[Per Arne Vollan]

Reopening to attach new patch.

[Per Arne Vollan]

Created attachment 450419 [details]
Patch

[EWS]

Committed r288826 (246596@main): <https://commits.webkit.org/246596@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 450419 [details].