Creating and applying OTA on Android 9 AOSP

[Fernando Medina]

We build our own internal distro of AOSP software and have always created OTA files in the following manner for previous AOSP versions:

./build/tools/releasetools/ota_from_target_files dist_output/tardis-target_files.zip ota_update.zip as per documentation.

We have never had issues applying those OTA files, either manually in recovery or using our internal FOTA tool.

In Android 9, we build the OTA files and they work when doing it manually in recovery, but it fails with our custom FOTA tool that has worked all the way through AOSP 8.

We get the following error when our FOTA client tries to apply OTA package.

W/System.err: java.io.FileNotFoundException: /cache/recovery/uncrypt_file (Permission denied)

We are not sure if the building of the OTA file has changed or if we are missing some new permission we need on FOTA client?  Any ideas?

Thanks,

[Tao Bao]

The error message looks like a runtime denial (possibly due to a SELinux denial), instead of a change to the package itself. But I can't tell if it's a known issue based on that line alone. The logs prior to the exception could be helpful, in particular something with "avc: denied" plus the name of the FOTA tool. Do you mind filing a bug (public or partner issue tracker) with more info?