Android 7.1 - Unable to set adequate mmap entropy value!

[sylvainpearson]

I have the following error while booting Android 7.1 on a custom board, based on iMX6q:

init: Unable to set adequate mmap entropy value!

init: Security failure; rebooting into recovery mode...

The error occurs in the set_mmap_rnd_bits_action() functions of the system/core/init/init.cpp.

By looking at the code, I see that the file “/proc/sys/vm/mmap_rnd_bits” either does not exist or is not writable.

We are in the process of migrating our Android 4.4 product to Android 7.1

I have followed the instruction android_N7.1.1_1.0.0_docs user manual and applied the Freescal patches, as requested.

I have attached to startup traces.

Any help will be greatly appreciated!

Original Attachment has been moved to: boot.log.zip

[Yuri]

Hello,

  Perhaps the issue, described in section 3.3.2 (RNG Trim fuses) of app note AN4581

takes place in Your case.

http://www.nxp.com/assets/documents/data/en/application-notes/AN4581.pdf 

Have a great day,

Yuri

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