getrandom() ENOSYS (Function not implemented)

DTL · n00b Joined: 23 Oct 2015 Posts: 8

Long story short - I have 2 arm boards - BananaPi and OrangePi. Both have the same settings and config with the only major difference that OrangePi uses LibreSSL.
The kernels are prebuilt (because I don't want to deal with cross-compiling), BananaPi kernel 3.4.103, OrangePi 3.4.39.

The problem is that since April I'm unable to connect to OrangePi. Initially I saw that dhcpcd failed to finish setting the IP ( I receive it, but fails after this). I'm able to set an IP manually and have connection. Then I decided to leave it with static IP, but I figured out sshd couldn't start either.

After days of different attempts I ended up using strace and I saw the error from the subject - "getrandom(…..) ENOSYS (Function not implemented)". Actually everything which requires any cryptography fails to start.

My further research showed that getrandom() has something to do with the kernel and glibc(https://old.lwn.net/Articles/711013/) - things, which I don't fully understand.

The fact that BananaPi works and OrangePi doesn't makes me thing it could be because of LibreSSL as this is the only major difference.

How can I fix this? Should I downgrade glibc? Or there are other ways.

I'm able to use portage and download/update/recompile packages, but because I can't connect remotely to the OrangePi it is hard for me to get any output of it and I'm sorry I don't post any.

If the output is really needed I can try to setup some web server and try to POST/PUT something using http. I'd appreciate any other ideas how to get output out of the box to post here.

khayyam · Posted: Mon Jun 04, 2018 6:38 pm Post subject:

DTL ...

DTL · n00b Joined: 23 Oct 2015 Posts: 8

Well, this is what I'm avoiding all the time

I don't have anything with Linux for cross-compiling and I really don't want to do it.

So my two options are - downgrade of glibc and kernel compilation.

I may try to find compiled kernel and try with it.