Duet 3 Mini WiFi crash in network interface code

[dc42]

Duet Forum Discussion Thread

https://forum.duet3d.com/topic/32537/extruder-stops-extruding-again-reboots-randomly-rrf-3-5b3

Which Duet products are you using?

• [ ] Duet2-Wifi
• [ ] Duet2-Ethernet
• [ ] Duet Expansion Breakout Board
• [ ] Duex2
• [ ] Duex5
• [ ] Duet2-Maestro
• [ ] Maestro Dual Driver Expansion
• [ ] Duet3-6HC
• [ ] Duet3-3HC
• [ ] Duet3-1XD
• [ ] Duet3-1LC
• [ ] Duet3-Tool Distribution Board
• [X] Duet3-Mini5+
• [ ] Duet3-Mini2+
• [ ] Raspberry Pi or other SBC
• [ ] SmartEffector
• [ ] Magnetic Filament Sensor
• [ ] Laser Filament Sensor
• [ ] PT100 Daughterboard
• [ ] Thermocouple Daughterboard
• [ ] PanelDue
• [ ] Other
• [ ] None

Firmware Version

3.5beta3+

Duet Web Control Version

3.5beta3

Are you using a Single Board Computer (RaspberryPi) with your Duet?

• [ ] Yes I use a SBC.
• [X] No I do not use a SBC.

What happened?

Duet is resetting randomly within the WiFi code with an imprecise hard fault.

[dc42]

Traced it to writing data via a null buffer pointer in WiFiSocket::ReceiveData. However, RRF already guards that code with a check for a null pointer. Temporarily added checks on the value of the register concerned around the calls made by that function.

[T3P3]

updated thread here: https://forum.duet3d.com/topic/33998/reboots-crashes-rrf-3-5-0-rc1/135