Dear linux-can Members, I hope this message finds you well. My name is Stefan Schmidt, and I am reaching out to seek your guidance regarding the "echo socket buffer occupied error". Context: Recently, we updated our kernel from 4.14 to 6.1.43 and our Debian from 10 to 12. The system runs on an Altera Cyclone V, which has two Bosch D_CAN CAN Controllers on board. We use both. Additionally, it is a dual core system with two Arm cores. Issue: After the update, I saw that both CAN devices sporadically print the message "BUG! echo_skb %d is occupied!" once into the syslog, with %d always being index 0.
