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and

The security patch level still appears to be 2021-10-05. The month listed on the factory images page doesn't correspond to the patch level. It would be very strange if they somehow got half a year of firmware and driver security updates previously not developed / available.

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and

It seemed odd to me that the kernel hasn't been updated but the SPL has - makes sense that the patches aren't new. I was waiting for a dump of the firmware to finish before confirming.

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and

They build from exactly the same code they publish to AOSP so checking there is quite reliable unless they made a mistake and pushed the wrong code. We've seen them make mistakes with the kernel tags before which we've had to report to get fixed but never for the main AOSP tags.

10:42 PM · Jun 27, 2022Twitter Web App

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and

Stock OS is built from the same AOSP source tree with additional device repositories providing the full build targets without the aosp_ prefix where they replace various AOSP modules with Google modules, include Google Play + other Google apps/services and build more vendor code.

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and

Dropping in additional code works because AOSP doesn't define raven, oriole, barbet, redfin, bramble, etc. but rather only aosp_raven, aosp_oriole, aosp_barbet, aosp_redfin, aosp_bramble, etc. so they can drop in private device repositories which source the AOSP code as a base.

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