keever50 opened a new issue, #16038:
URL: https://github.com/apache/nuttx/issues/16038

   ### Description / Steps to reproduce the issue
   
   Board: raspberrypi-pico / any RP2040 based boards
   Config: usbnsh, nsh or any nsh including configs.
   
   Symptoms: When using the nsh console, the messages are randomly missing 
characters or entire lines. When you press UP to get your old commands, it has 
no limit and happily recover random garbage from memory and crash the OS.
   
   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.
   
   A screenshot of broken messages:
   
   
![Image](https://github.com/user-attachments/assets/3bcc3f01-5d06-47d0-a7d6-56df6eea5739)
   
   **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
   
   ### 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
   
   - [x] I have verified before submitting the report.


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