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[128.10.127.250]) by smtp.googlemail.com with ESMTPSA id k18-20020a92c9d2000000b00302632f0d20sm1752096ilq.67.2022.11.14.21.03.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Nov 2022 21:03:02 -0800 (PST) From: Sungwoo Kim X-Google-Original-From: Sungwoo Kim To: luiz.dentz@gmail.com Cc: davem@davemloft.net, edumazet@google.com, iam@sung-woo.kim, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org, pabeni@redhat.com Subject: Re: L2CAP: Spec violation Date: Tue, 15 Nov 2022 00:02:57 -0500 Message-Id: <20221115050257.3818178-1-git@sung-woo.kim> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Sure, btmon trace: (...) > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 17.083174 invalid packet size (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ @ MGMT Event: Device Connected (0x000b) plen 13 {0x0002} [hci0] 17.104462 BR/EDR Address: 10:AA:AA:AA:AA:AA (OUI 10-AA-AA) Flags: 0x00000000 Data length: 0 @ MGMT Event: Device Connected (0x000b) plen 13 {0x0001} [hci0] 17.104462 BR/EDR Address: 10:AA:AA:AA:AA:AA (OUI 10-AA-AA) Flags: 0x00000000 Data length: 0 < ACL Data TX: Handle 200 flags 0x02 dlen 16 #33 [hci0] 17.149691 L2CAP: Connection Response (0x03) ident 1 len 8 Destination CID: 64 Source CID: 65535 Result: Connection pending (0x0001) Status: No further information available (0x0000) < ACL Data TX: Handle 200 flags 0x02 dlen 10 #34 [hci0] 17.154828 L2CAP: Information Request (0x0a) ident 2 len 2 Type: Extended features supported (0x0002) > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 17.145762 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 01 02 00 00 ........@....... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #36 [hci0] 17.146654 invalid packet size (16 != 2061) 0c 00 01 00 03 01 08 00 00 00 00 00 00 00 00 00 ................ > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #37 [hci0] 17.147190 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 05 00 00 00 ........@....... > ACL Data RX: Handle 200 flags 0x00 dlen 1804 #38 [hci0] 17.148090 invalid packet size (15 != 1804) 0b 00 01 00 04 01 07 00 40 00 00 00 05 00 00 ........@...... > ACL Data RX: Handle 200 flags 0x00 dlen 1547 #39 [hci0] 17.148708 invalid packet size (14 != 1547) (...) The last ACL data packet invokes: l2cap_bredr_sig_cmd l2cap_config_rsp l2cap_send_disconn_req l2cap_state_change_and_error Bluetooth: chan 00000000205763be BT_CONFIG -> BT_DISCONN This is the code and whole log: https://gist.github.com/swkim101/82bc694f9427f008c14e91307b3355b6 Thanks.