kernel: protection fault trap, code=0

Stopped at      vio_populate_rx_mbufs+0xae:     movl    0x8(%r13),%esi

ddb> serialport: Connected to syzkaller.us-central1-b.ci-openbsd-main-test-2 port 1 (session ID: decc6ecb395c8bf68ff3c2a544395e77bb515a8eb98e4b5b62c6782099cecbcc, active connections: 1).