CLI mode uninitialization is causing hardfault

[nabeela]

I have a setup what startups up a device in CLI mode (UART + RTT) when certain test condition set at bootup. 

However, I implemented a command to "uninitialize" CLI mode for UART and RTT when sent a certain command - say "set_cli_inactive" - a custom CLI command. 

When this command is called, the following lines are executed:

/// Process any pending CLI
nrf_cli_process(&m_cli_uart);
/// Stop CLI
ret = nrf_cli_stop(&m_cli_uart);
APP_ERROR_CHECK(ret);
/// Uninit CLI
ret = nrf_cli_uninit(&m_cli_uart);
APP_ERROR_CHECK(ret);

However - deep inside the function call 'nrf_cli_uninit(...)' , going inside 'nrf_cli_instance_uninit(p_cli);' and then I see that the last line exectud before hardfault is 'nrf_log_backend_disable(p_cli->p_log_backend);'

Resulting in:

Hard Fault at address: 0x00000000

No order of operation changes help, I don't see what is missing. Is there a bug in the SDK code?

Using SDK 15.3

[Sigurd]

Hi,

Using SDK 15.3

Do you see the same issue using SDK v17.1.0 ?

Latest version of the nRF5 SDK is v17.1.0. I recommend that you upgrade to the latest SDK version

[nabeela]

Hi,

I have not tried with latest SDK version as our project was built with 15.3 over the last 3 years.
Is this a known issue/bug with SDK 15.3? - I didn't find a mention in the release notes of the SDK versions.

[Sigurd]

nabeela said:

I have not tried with latest SDK version as our project was built with 15.3 over the last 3 years.

I see, but it would be interesting to know if you are able to reproduce this on latest SDK version or not.

nabeela said:

Is this a known issue/bug with SDK 15.3? - I didn't find a mention in the release notes of the SDK versions.

I didn't find anything that matches either. 

Here are the known CLI related bugs in SDK 15.3 I found:

 nrf_memobj_put not called if log message exceeds serial buffer len in nrf_log_backend_flash.c 

 Potential bug in nrf_cli.c (SDK 15.3.0)