You see kernel: Lockdown: ktag: restricted operation in dmesg .
At of the reading/writing process does the error pop up?
It sounds like you're encountering an error related to (a tool used for reading/writing ECUs via BDM/JTAG in automotive tuning).
If you work with ECU tuning, remapping, or chip tuning, you have likely encountered the frustrating error on your KTAG master or slave tool. This error completely halts the reading or writing process, leaving you stranded mid-job.
Most often, the error is resolved by ensuring the file you are writing matches what was read (Full Backup vs. separate files) or by using an original, unmodified file to break a previous tuner's lock. If these steps fail, verifying the tool's compatibility with the ECU and ensuring a stable power supply are the next best actions.
or
System boots with UEFI Secure Boot enabled; mokutil --sb-state shows Secure Boot on.
UBIFS is a popular filesystem for raw NAND flash memory used in embedded systems, routers, and IoT devices. UBIFS maintains "node tags" that contain CRC checksums, sequence numbers, and length information.
I can provide specific pinouts, protocol numbers, or software fixes based on your setup. Share public link
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Use a dedicated laptop for your tuning tools. Keep its Wi-Fi turned off permanently if you primarily use clone tools, ensuring no automatic updates occur.