nRF54L15 MPSL init stack corruption

RE: nRF54L15 MPSL init stack corruption

Kenneth — Mon, 17 Mar 2025 15:33:43 GMT

Hi,

https://github.com/nrfconnect/sdk-nrfxlib/pull/1679 should fix the issue on ncs main in case you can try and verify.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Kenneth — Thu, 13 Mar 2025 12:06:07 GMT

Just want you to know we have not forgotten this case, but they are still working on it.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Kenneth — Thu, 06 Mar 2025 13:47:02 GMT

Hi,

There have been other ongoing activities at the moment, but I got confirmation someone will start look into this now. Sorry for the delay.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Remi.G — Thu, 06 Mar 2025 00:44:19 GMT

Any update on this? It became a blocker when I was implementing OTA, because the reset would occur before the app confirmed the image, causing it to revert some of the time.

I added this temporary workaround for now, in my application:

static int boot_workaround(void)

{

__disable_irq();

return 0;

}

// This needs to be higher priority than CONFIG_KERNEL_INIT_PRIORITY_DEFAULT=40

SYS_INIT(boot_workaround, PRE_KERNEL_1, 39);

That runs before mpsl init and disables interrupts globally. When scheduler is initialized after PRE_KERNEL inits, they get globally re-enabled.

Perhaps interrupts should have been globally disabled during inits, in Zephyr? I didn't test whether disabling them very early has any impact, only just before mpsl init, which is late in the PRE_KERNEL inits.

RE: nRF54L15 MPSL init stack corruption

Kenneth — Tue, 18 Feb 2025 17:18:12 GMT

Thanks for the clarification, checking internally.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Remi.G — Tue, 18 Feb 2025 15:29:17 GMT

This is all very early in kernel startup, none of my code has run yet. If there is an issue, it's in Zephyr or Nordic code.

Configuring overlapping stacks with interrupts enabled is a bug. Counting on the interrupt to not occur is not very robust, it's an accident waiting to happen.

RE: nRF54L15 MPSL init stack corruption

Kenneth — Tue, 18 Feb 2025 12:31:07 GMT

It's not quite clear to me.

It may seem you are triggering one of the interrupts reserved by mpsl, which is not supported. The workaround should be to disable/clear the reserved interrupts before mpsl_init runs.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Kenneth — Mon, 17 Feb 2025 16:16:25 GMT

Thanks for the additional details, I will ask internally now.

Kenneth

RE: nRF54L15 MPSL init stack corruption

Remi.G — Mon, 17 Feb 2025 15:39:01 GMT

Sorry, this is NCS 2.9.0 (the latest) and the DK is PCS10156 v0.9.2 2024.49.

RE: nRF54L15 MPSL init stack corruption

Kenneth — Mon, 17 Feb 2025 12:57:22 GMT

Hello,

You are not writing which DK (see white label on the DK) you have of the nRF54L15 and which nRF Connect SDK version you are working on. Please state that.

Before I report this internally, can you also try latest main of nRF Connect SDK if you observe the same?

Kenneth