NRF9160 SDK 1.4 crash in random number generation

RE: NRF9160 SDK 1.4 crash in random number generation

Amanda Hsieh — Thu, 19 Nov 2020 14:06:20 GMT

Hi,

See this https://github.com/nrfconnect/sdk-nrf/commit/2291ddb833869ba15f2705da7e6c13851440ad68 on how to increases SPM stack size.

-Amanda H.

RE: NRF9160 SDK 1.4 crash in random number generation

fastfox — Thu, 19 Nov 2020 12:47:26 GMT

I am sorry, I don't understand your hint. So how do you increase the SPM stack size?

RE: NRF9160 SDK 1.4 crash in random number generation

Amanda Hsieh — Thu, 19 Nov 2020 12:35:17 GMT

yes, and this https://github.com/nrfconnect/sdk-nrf/blob/master/drivers/entropy/entropy_cc310.c

-Amanda H.

RE: NRF9160 SDK 1.4 crash in random number generation

fastfox — Wed, 18 Nov 2020 09:02:36 GMT

If I just could figure out how to exactly do that... Increasing the SPM stack that is. They look pretty identical with master, but I am probably looking at the wrong place. I should be looking at the stuff in https://github.com/nrfconnect/sdk-nrf/tree/master/subsys/spm right?

RE: NRF9160 SDK 1.4 crash in random number generation

fastfox — Tue, 17 Nov 2020 12:09:36 GMT

I asked about the workaround in github https://github.com/nrfconnect/sdk-nrf/pull/2997

unfortunately SPM entropy issue is still being investigated internally.
There were some fixes in 1.4. but apparently, they weren't enough.
It is suspected it might be a stack overflow in SPM, 
increasing the stack prevents the crash. The SPM stack is already increased on the master.

So I'll try the stack size change and see what happens