kernel: protection fault trap, code=0

Stopped at      witness_checkorder+0xa9:        movl    0x18(%r14),%r15d

ddb{0}> serialport: Connected to syzkaller.us-central1-b.ci-openbsd-setuid-5 port 1 (session ID: 5c5cbcbf4ec8391390757522be4b59f1590380ea03630a7a9f358421d4b5e71c, active connections: 1).