Hi Kim, On Fri, Nov 4, 2022 at 9:13 AM Sungwoo Kim <iam@xxxxxxxxxxxx> wrote: > > Hello, > > Our fuzzer found a BT spec violation, illegal state transition on L2cap. > Specifically, l2cap_chan::state is transitioned from BT_CONFIG to > BT_DISCONN by CONFIG_RSP by following trace: > > l2cap_config_rsp l2cap_core.c:4498 > l2cap_send_disconn_req l2cap_core.c:4585 > l2cap_state_change l2cap_core.c:1618 > > According to the spec 5.3 vol.3 part A 6.1.4, CONFIG_RSP cannot cause > that transition, i.e., CONFIG -> DISCONN by CONFIG_RSP is illegal. > It'd be great if we could discuss. Can you include some btmon traces? -- Luiz Augusto von Dentz
