[BUG] RP2040 NSH console broken messages and crashes (memory corruption)

[keever50]

Description / Steps to reproduce the issue

Board: raspberrypi-pico / any RP2040 based boards
Config: usbnsh, nsh or any nsh including configs.

Symptoms: Depending on the configuration, broken messages and crashes behave differently. This looks like a typical memory corruption issue. This is seen in the NSH printing garbage or missing lines. But also crashes happen in running ostest, which also fail at random moments depending on configuration.

Reproduce broken messages:

1. Run commands like help or ls /dev
2. Console shows broken messages

Reproduce crash and garbage:

1. Press up without history
2. Garbage, OS hang or program crashes at a later stage.

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1. Run ostest on random configurations
2. ostest fails at random locations

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1. use syslog
2. fails at random moments and prints garbage

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A screenshot of broken messages:

Cross check

• This is tested with the NuttX simulation where this cannot be replicated.
• This appears to get worse when syslog is enabled.
• Any output, serial, RAM or USB produces these results
• STM32 F446RE does not have this issue. It also has no history feature.

Attempts to fix issue

• Updated the Pico SDK. No effect.
• Clean NuttX install. No effect.

On which OS does this issue occur?

[OS: Linux]

What is the version of your OS?

Arch Linux 6.13.7-arch1-1

NuttX Version

Master

Issue Architecture

[Arch: arm]

Issue Area

[Area: OS Components]

Host information

Any configuration with NSH will produce this.

Verification

• I have verified before submitting the report.

[keever50]

I filled in OS Components but this could be an RP2040 specific issue as well. I'm not sure how NSH works.

[keever50]

I also ran ostest and it looks fine. Also contains broken messages, but completes successfully.

[keever50]

Confirmed that STM32 F446RE does not have this issue. It does not even let me go back in history

[keever50]

Now RP2040 fails the ostest. This is something that is quite new.

[keever50]

I did narrowed the crashes down to SYSLOG. When this is enabled, it does not pass the ostest and randomly crashes the OS when logging is used.

If i disable SYSLOG or atleast do not let it output to anything, it does not crash the system.

[keever50]

I somehow fixed the entire problem by enabling kernel address sanitizer... I am not sure why? Everything is printing correctly now.

[keever50]

Nevermind this makes it fail on different ways.
Okay, so this looks like memory corruption. So this problem is way worse.

[keever50]

I found the problem.

If i use my RP2040 on my desktop PC. It crashes.
If i use it on my laptop, it works. Always.
Same firmware.

This is not nuttx related then...
However if anyone has any idea why this happens let me know.