From 1f029b4e30a602db33dedee5ac676e9236ad193c Mon Sep 17 00:00:00 2001 From: Yang Li Date: Thu, 19 Jun 2025 11:01:07 +0800 Subject: [PATCH 1/5] Bluetooth: Prevent unintended pause by checking if advertising is active When PA Create Sync is enabled, advertising resumes unexpectedly. Therefore, it's necessary to check whether advertising is currently active before attempting to pause it. < HCI Command: LE Add Device To... (0x08|0x0011) plen 7 #1345 [hci0] 48.306205 Address type: Random (0x01) Address: 4F:84:84:5F:88:17 (Resolvable) Identity type: Random (0x01) Identity: FC:5B:8C:F7:5D:FB (Static) < HCI Command: LE Set Address Re.. (0x08|0x002d) plen 1 #1347 [hci0] 48.308023 Address resolution: Enabled (0x01) ... < HCI Command: LE Set Extended A.. (0x08|0x0039) plen 6 #1349 [hci0] 48.309650 Extended advertising: Enabled (0x01) Number of sets: 1 (0x01) Entry 0 Handle: 0x01 Duration: 0 ms (0x00) Max ext adv events: 0 ... < HCI Command: LE Periodic Adve.. (0x08|0x0044) plen 14 #1355 [hci0] 48.314575 Options: 0x0000 Use advertising SID, Advertiser Address Type and address Reporting initially enabled SID: 0x02 Adv address type: Random (0x01) Adv address: 4F:84:84:5F:88:17 (Resolvable) Identity type: Random (0x01) Identity: FC:5B:8C:F7:5D:FB (Static) Skip: 0x0000 Sync timeout: 20000 msec (0x07d0) Sync CTE type: 0x0000 Fixes: ad383c2c65a5 ("Bluetooth: hci_sync: Enable advertising when LL privacy is enabled") Signed-off-by: Yang Li Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_sync.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 6687f2a4d1eb..42d3696227af 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -2481,6 +2481,10 @@ static int hci_pause_advertising_sync(struct hci_dev *hdev) int err; int old_state; + /* If controller is not advertising we are done. */ + if (!hci_dev_test_flag(hdev, HCI_LE_ADV)) + return 0; + /* If already been paused there is nothing to do. */ if (hdev->advertising_paused) return 0; From 46c0d947b64ac8efcf89dd754213dab5d1bd00aa Mon Sep 17 00:00:00 2001 From: Christian Eggers Date: Wed, 25 Jun 2025 15:09:29 +0200 Subject: [PATCH 2/5] Bluetooth: hci_sync: revert some mesh modifications This reverts minor parts of the changes made in commit b338d91703fa ("Bluetooth: Implement support for Mesh"). It looks like these changes were only made for development purposes but shouldn't have been part of the commit. Fixes: b338d91703fa ("Bluetooth: Implement support for Mesh") Cc: stable@vger.kernel.org Signed-off-by: Christian Eggers Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_sync.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 42d3696227af..106862d47964 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -1970,13 +1970,10 @@ static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk) static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force) { struct adv_info *adv, *n; - int err = 0; if (ext_adv_capable(hdev)) /* Remove all existing sets */ - err = hci_clear_adv_sets_sync(hdev, sk); - if (ext_adv_capable(hdev)) - return err; + return hci_clear_adv_sets_sync(hdev, sk); /* This is safe as long as there is no command send while the lock is * held. @@ -2004,13 +2001,11 @@ static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force) static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance, struct sock *sk) { - int err = 0; + int err; /* If we use extended advertising, instance has to be removed first. */ if (ext_adv_capable(hdev)) - err = hci_remove_ext_adv_instance_sync(hdev, instance, sk); - if (ext_adv_capable(hdev)) - return err; + return hci_remove_ext_adv_instance_sync(hdev, instance, sk); /* This is safe as long as there is no command send while the lock is * held. @@ -2109,16 +2104,13 @@ int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type) int hci_disable_advertising_sync(struct hci_dev *hdev) { u8 enable = 0x00; - int err = 0; /* If controller is not advertising we are done. */ if (!hci_dev_test_flag(hdev, HCI_LE_ADV)) return 0; if (ext_adv_capable(hdev)) - err = hci_disable_ext_adv_instance_sync(hdev, 0x00); - if (ext_adv_capable(hdev)) - return err; + return hci_disable_ext_adv_instance_sync(hdev, 0x00); return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable, HCI_CMD_TIMEOUT); From e5af67a870f738bb8a4594b6c60c2caf4c87a3c9 Mon Sep 17 00:00:00 2001 From: Christian Eggers Date: Wed, 25 Jun 2025 15:09:30 +0200 Subject: [PATCH 3/5] Bluetooth: MGMT: set_mesh: update LE scan interval and window According to the message of commit b338d91703fa ("Bluetooth: Implement support for Mesh"), MGMT_OP_SET_MESH_RECEIVER should set the passive scan parameters. Currently the scan interval and window parameters are silently ignored, although user space (bluetooth-meshd) expects that they can be used [1] [1] https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/mesh/mesh-io-mgmt.c#n344 Fixes: b338d91703fa ("Bluetooth: Implement support for Mesh") Cc: stable@vger.kernel.org Signed-off-by: Christian Eggers Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/mgmt.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index d540f7b4f75f..5d0f772c7a99 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -2153,6 +2153,9 @@ static int set_mesh_sync(struct hci_dev *hdev, void *data) else hci_dev_clear_flag(hdev, HCI_MESH); + hdev->le_scan_interval = __le16_to_cpu(cp->period); + hdev->le_scan_window = __le16_to_cpu(cp->window); + len -= sizeof(*cp); /* If filters don't fit, forward all adv pkts */ @@ -2167,6 +2170,7 @@ static int set_mesh(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { struct mgmt_cp_set_mesh *cp = data; struct mgmt_pending_cmd *cmd; + __u16 period, window; int err = 0; bt_dev_dbg(hdev, "sock %p", sk); @@ -2180,6 +2184,23 @@ static int set_mesh(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_MESH_RECEIVER, MGMT_STATUS_INVALID_PARAMS); + /* Keep allowed ranges in sync with set_scan_params() */ + period = __le16_to_cpu(cp->period); + + if (period < 0x0004 || period > 0x4000) + return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_MESH_RECEIVER, + MGMT_STATUS_INVALID_PARAMS); + + window = __le16_to_cpu(cp->window); + + if (window < 0x0004 || window > 0x4000) + return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_MESH_RECEIVER, + MGMT_STATUS_INVALID_PARAMS); + + if (window > period) + return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_MESH_RECEIVER, + MGMT_STATUS_INVALID_PARAMS); + hci_dev_lock(hdev); cmd = mgmt_pending_add(sk, MGMT_OP_SET_MESH_RECEIVER, hdev, data, len); @@ -6432,6 +6453,7 @@ static int set_scan_params(struct sock *sk, struct hci_dev *hdev, return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS, MGMT_STATUS_NOT_SUPPORTED); + /* Keep allowed ranges in sync with set_mesh() */ interval = __le16_to_cpu(cp->interval); if (interval < 0x0004 || interval > 0x4000) From f3cb5676e5c11c896ba647ee309a993e73531588 Mon Sep 17 00:00:00 2001 From: Christian Eggers Date: Wed, 25 Jun 2025 15:09:31 +0200 Subject: [PATCH 4/5] Bluetooth: MGMT: mesh_send: check instances prior disabling advertising The unconditional call of hci_disable_advertising_sync() in mesh_send_done_sync() also disables other LE advertisings (non mesh related). I am not sure whether this call is required at all, but checking the adv_instances list (like done at other places) seems to solve the problem. Fixes: b338d91703fa ("Bluetooth: Implement support for Mesh") Cc: stable@vger.kernel.org Signed-off-by: Christian Eggers Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/mgmt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 5d0f772c7a99..1485b455ade4 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1080,7 +1080,8 @@ static int mesh_send_done_sync(struct hci_dev *hdev, void *data) struct mgmt_mesh_tx *mesh_tx; hci_dev_clear_flag(hdev, HCI_MESH_SENDING); - hci_disable_advertising_sync(hdev); + if (list_empty(&hdev->adv_instances)) + hci_disable_advertising_sync(hdev); mesh_tx = mgmt_mesh_next(hdev, NULL); if (mesh_tx) From 89fb8acc38852116d38d721ad394aad7f2871670 Mon Sep 17 00:00:00 2001 From: Christian Eggers Date: Fri, 27 Jun 2025 09:05:08 +0200 Subject: [PATCH 5/5] Bluetooth: HCI: Set extended advertising data synchronously Currently, for controllers with extended advertising, the advertising data is set in the asynchronous response handler for extended adverstising params. As most advertising settings are performed in a synchronous context, the (asynchronous) setting of the advertising data is done too late (after enabling the advertising). Move setting of adverstising data from asynchronous response handler into synchronous context to fix ordering of HCI commands. Signed-off-by: Christian Eggers Fixes: a0fb3726ba55 ("Bluetooth: Use Set ext adv/scan rsp data if controller supports") Cc: stable@vger.kernel.org v2: https://lore.kernel.org/linux-bluetooth/20250626115209.17839-1-ceggers@arri.de/ Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_event.c | 36 ------- net/bluetooth/hci_sync.c | 207 ++++++++++++++++++++++++-------------- 2 files changed, 130 insertions(+), 113 deletions(-) diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 66052d6aaa1d..4d5ace9d245d 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -2150,40 +2150,6 @@ static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data, return rp->status; } -static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data, - struct sk_buff *skb) -{ - struct hci_rp_le_set_ext_adv_params *rp = data; - struct hci_cp_le_set_ext_adv_params *cp; - struct adv_info *adv_instance; - - bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); - - if (rp->status) - return rp->status; - - cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS); - if (!cp) - return rp->status; - - hci_dev_lock(hdev); - hdev->adv_addr_type = cp->own_addr_type; - if (!cp->handle) { - /* Store in hdev for instance 0 */ - hdev->adv_tx_power = rp->tx_power; - } else { - adv_instance = hci_find_adv_instance(hdev, cp->handle); - if (adv_instance) - adv_instance->tx_power = rp->tx_power; - } - /* Update adv data as tx power is known now */ - hci_update_adv_data(hdev, cp->handle); - - hci_dev_unlock(hdev); - - return rp->status; -} - static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data, struct sk_buff *skb) { @@ -4164,8 +4130,6 @@ static const struct hci_cc { HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS, hci_cc_le_read_num_adv_sets, sizeof(struct hci_rp_le_read_num_supported_adv_sets)), - HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param, - sizeof(struct hci_rp_le_set_ext_adv_params)), HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE, hci_cc_le_set_ext_adv_enable), HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR, diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 106862d47964..77b3691f3423 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -1205,9 +1205,126 @@ static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance, sizeof(cp), &cp, HCI_CMD_TIMEOUT); } +static int +hci_set_ext_adv_params_sync(struct hci_dev *hdev, struct adv_info *adv, + const struct hci_cp_le_set_ext_adv_params *cp, + struct hci_rp_le_set_ext_adv_params *rp) +{ + struct sk_buff *skb; + + skb = __hci_cmd_sync(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(*cp), + cp, HCI_CMD_TIMEOUT); + + /* If command return a status event, skb will be set to -ENODATA */ + if (skb == ERR_PTR(-ENODATA)) + return 0; + + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", + HCI_OP_LE_SET_EXT_ADV_PARAMS, PTR_ERR(skb)); + return PTR_ERR(skb); + } + + if (skb->len != sizeof(*rp)) { + bt_dev_err(hdev, "Invalid response length for 0x%4.4x: %u", + HCI_OP_LE_SET_EXT_ADV_PARAMS, skb->len); + kfree_skb(skb); + return -EIO; + } + + memcpy(rp, skb->data, sizeof(*rp)); + kfree_skb(skb); + + if (!rp->status) { + hdev->adv_addr_type = cp->own_addr_type; + if (!cp->handle) { + /* Store in hdev for instance 0 */ + hdev->adv_tx_power = rp->tx_power; + } else if (adv) { + adv->tx_power = rp->tx_power; + } + } + + return rp->status; +} + +static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + DEFINE_FLEX(struct hci_cp_le_set_ext_adv_data, pdu, data, length, + HCI_MAX_EXT_AD_LENGTH); + u8 len; + struct adv_info *adv = NULL; + int err; + + if (instance) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv || !adv->adv_data_changed) + return 0; + } + + len = eir_create_adv_data(hdev, instance, pdu->data, + HCI_MAX_EXT_AD_LENGTH); + + pdu->length = len; + pdu->handle = adv ? adv->handle : instance; + pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE; + pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG; + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA, + struct_size(pdu, data, len), pdu, + HCI_CMD_TIMEOUT); + if (err) + return err; + + /* Update data if the command succeed */ + if (adv) { + adv->adv_data_changed = false; + } else { + memcpy(hdev->adv_data, pdu->data, len); + hdev->adv_data_len = len; + } + + return 0; +} + +static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_adv_data cp; + u8 len; + + memset(&cp, 0, sizeof(cp)); + + len = eir_create_adv_data(hdev, instance, cp.data, sizeof(cp.data)); + + /* There's nothing to do if the data hasn't changed */ + if (hdev->adv_data_len == len && + memcmp(cp.data, hdev->adv_data, len) == 0) + return 0; + + memcpy(hdev->adv_data, cp.data, sizeof(cp.data)); + hdev->adv_data_len = len; + + cp.length = len; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) + return 0; + + if (ext_adv_capable(hdev)) + return hci_set_ext_adv_data_sync(hdev, instance); + + return hci_set_adv_data_sync(hdev, instance); +} + int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance) { struct hci_cp_le_set_ext_adv_params cp; + struct hci_rp_le_set_ext_adv_params rp; bool connectable; u32 flags; bdaddr_t random_addr; @@ -1316,8 +1433,12 @@ int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance) cp.secondary_phy = HCI_ADV_PHY_1M; } - err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, - sizeof(cp), &cp, HCI_CMD_TIMEOUT); + err = hci_set_ext_adv_params_sync(hdev, adv, &cp, &rp); + if (err) + return err; + + /* Update adv data as tx power is known now */ + err = hci_set_ext_adv_data_sync(hdev, cp.handle); if (err) return err; @@ -1822,79 +1943,6 @@ int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason) sizeof(cp), &cp, HCI_CMD_TIMEOUT); } -static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance) -{ - DEFINE_FLEX(struct hci_cp_le_set_ext_adv_data, pdu, data, length, - HCI_MAX_EXT_AD_LENGTH); - u8 len; - struct adv_info *adv = NULL; - int err; - - if (instance) { - adv = hci_find_adv_instance(hdev, instance); - if (!adv || !adv->adv_data_changed) - return 0; - } - - len = eir_create_adv_data(hdev, instance, pdu->data, - HCI_MAX_EXT_AD_LENGTH); - - pdu->length = len; - pdu->handle = adv ? adv->handle : instance; - pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE; - pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG; - - err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA, - struct_size(pdu, data, len), pdu, - HCI_CMD_TIMEOUT); - if (err) - return err; - - /* Update data if the command succeed */ - if (adv) { - adv->adv_data_changed = false; - } else { - memcpy(hdev->adv_data, pdu->data, len); - hdev->adv_data_len = len; - } - - return 0; -} - -static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance) -{ - struct hci_cp_le_set_adv_data cp; - u8 len; - - memset(&cp, 0, sizeof(cp)); - - len = eir_create_adv_data(hdev, instance, cp.data, sizeof(cp.data)); - - /* There's nothing to do if the data hasn't changed */ - if (hdev->adv_data_len == len && - memcmp(cp.data, hdev->adv_data, len) == 0) - return 0; - - memcpy(hdev->adv_data, cp.data, sizeof(cp.data)); - hdev->adv_data_len = len; - - cp.length = len; - - return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA, - sizeof(cp), &cp, HCI_CMD_TIMEOUT); -} - -int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance) -{ - if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) - return 0; - - if (ext_adv_capable(hdev)) - return hci_set_ext_adv_data_sync(hdev, instance); - - return hci_set_adv_data_sync(hdev, instance); -} - int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance, bool force) { @@ -6273,6 +6321,7 @@ static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev, struct hci_conn *conn) { struct hci_cp_le_set_ext_adv_params cp; + struct hci_rp_le_set_ext_adv_params rp; int err; bdaddr_t random_addr; u8 own_addr_type; @@ -6314,8 +6363,12 @@ static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev, if (err) return err; - err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, - sizeof(cp), &cp, HCI_CMD_TIMEOUT); + err = hci_set_ext_adv_params_sync(hdev, NULL, &cp, &rp); + if (err) + return err; + + /* Update adv data as tx power is known now */ + err = hci_set_ext_adv_data_sync(hdev, cp.handle); if (err) return err;