login: === DF-5733 harness: PN response MTU=0 -> divide by zero ===
[harness] rfcomm_connect -> 0; dlc 0xfffff8008d445f70 dlci 6 mtu 127 state 1
[harness] == L2CAP connected ==
[l2cap-stub] send: 4 bytes (first octet 0x3)
[harness] <- UA(0)  [session up] (4 bytes): 03 73 01 d7
[l2cap-stub] send: 11 bytes (first octet 0x3)
[harness] <- UIH(0) PN response mtu=0 (14 bytes): 03 ef 15 81 11 06 e0 00 00 00 00 00 00 70
[l2cap-stub] send: 4 bytes (first octet 0x1b)
[harness] after PN response: dlc->rd_mtu = 127  (poisoned!)
[harness] session CFC = 0, dlc state = 7
[harness] <- UA(6)  [dlc up] (4 bytes): 1b 73 01 18
[upper] disconnected (0)
[l2cap-stub] send: 4 bytes (first octet 0x3)
[harness] <- UIH(0) MSC response (8 bytes): 03 ef 09 e1 05 1b 8d 70
[harness] dlc state = 0 (6 = OPEN), rd_mtu = 127
[harness] app sends 1 byte -> rfcomm_dlc_start()
[harness] NOTREACHED (expected divide-by-zero panic)