Messages in this thread | | | From | Luiz Augusto von Dentz <> | Date | Mon, 14 Nov 2022 14:05:24 -0800 | Subject | Re: L2CAP: Spec violation |
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Hi Kim,
On Fri, Nov 4, 2022 at 9:13 AM Sungwoo Kim <iam@sung-woo.kim> 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
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