Merge tag 'for-net-2023-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - Fix MGMT add advmon with RSSI command
 - L2CAP: Fix responding with wrong PDU type
 - Fix race condition in hci_cmd_sync_clear
 - ISO: Fix timestamped HCI ISO data packet parsing
 - HCI: Fix global-out-of-bounds
 - hci_sync: Resume adv with no RPA when active scan

* tag 'for-net-2023-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: HCI: Fix global-out-of-bounds
  Bluetooth: mgmt: Fix MGMT add advmon with RSSI command
  Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work
  Bluetooth: L2CAP: Fix responding with wrong PDU type
  Bluetooth: btqcomsmd: Fix command timeout after setting BD address
  Bluetooth: btinel: Check ACPI handle for NULL before accessing
  Bluetooth: Remove "Power-on" check from Mesh feature
  Bluetooth: Fix race condition in hci_cmd_sync_clear
  Bluetooth: btintel: Iterate only bluetooth device ACPI entries
  Bluetooth: ISO: fix timestamped HCI ISO data packet parsing
  Bluetooth: btusb: Remove detection of ISO packets over bulk
  Bluetooth: hci_core: Detect if an ACL packet is in fact an ISO packet
  Bluetooth: hci_sync: Resume adv with no RPA when active scan
====================

Link: https://lore.kernel.org/r/20230323202335.3380841-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

drivers/bluetooth/btintel.c

@@ -26,7 +26,14 @@
 #define ECDSA_HEADER_LEN	320
 
 #define BTINTEL_PPAG_NAME   "PPAG"
-#define BTINTEL_PPAG_PREFIX "\\_SB_.PCI0.XHCI.RHUB"
+
+/* structure to store the PPAG data read from ACPI table */
+struct btintel_ppag {
+	u32	domain;
+	u32     mode;
+	acpi_status status;
+	struct hci_dev *hdev;
+};
 
 #define CMD_WRITE_BOOT_PARAMS	0xfc0e
 struct cmd_write_boot_params {
@@ -1295,17 +1302,16 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
 
 	status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
 	if (ACPI_FAILURE(status)) {
-		bt_dev_warn(hdev, "ACPI Failure: %s", acpi_format_exception(status));
+		bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
 		return status;
 	}
 
-	if (strncmp(BTINTEL_PPAG_PREFIX, string.pointer,
-		    strlen(BTINTEL_PPAG_PREFIX))) {
+	len = strlen(string.pointer);
+	if (len < strlen(BTINTEL_PPAG_NAME)) {
 		kfree(string.pointer);
 		return AE_OK;
 	}
 
-	len = strlen(string.pointer);
 	if (strncmp((char *)string.pointer + len - 4, BTINTEL_PPAG_NAME, 4)) {
 		kfree(string.pointer);
 		return AE_OK;
@@ -1314,7 +1320,8 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
 
 	status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
 	if (ACPI_FAILURE(status)) {
-		bt_dev_warn(hdev, "ACPI Failure: %s", acpi_format_exception(status));
+		ppag->status = status;
+		bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
 		return status;
 	}
 
@@ -1323,8 +1330,9 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
 
 	if (p->type != ACPI_TYPE_PACKAGE || p->package.count != 2) {
 		kfree(buffer.pointer);
-		bt_dev_warn(hdev, "Invalid object type: %d or package count: %d",
+		bt_dev_warn(hdev, "PPAG-BT: Invalid object type: %d or package count: %d",
 			    p->type, p->package.count);
+		ppag->status = AE_ERROR;
 		return AE_ERROR;
 	}
 
@@ -1335,6 +1343,7 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
 
 	ppag->domain = (u32)p->package.elements[0].integer.value;
 	ppag->mode = (u32)p->package.elements[1].integer.value;
+	ppag->status = AE_OK;
 	kfree(buffer.pointer);
 	return AE_CTRL_TERMINATE;
 }
@@ -2314,42 +2323,48 @@ static int btintel_configure_offload(struct hci_dev *hdev)
 
 static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver)
 {
-	acpi_status status;
 	struct btintel_ppag ppag;
 	struct sk_buff *skb;
 	struct btintel_loc_aware_reg ppag_cmd;
+	acpi_handle handle;
 
-    /* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
+	/* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
 	switch (ver->cnvr_top & 0xFFF) {
 	case 0x504:     /* Hrp2 */
 	case 0x202:     /* Jfp2 */
 	case 0x201:     /* Jfp1 */
 		return;
 	}
 
+	handle = ACPI_HANDLE(GET_HCIDEV_DEV(hdev));
+	if (!handle) {
+		bt_dev_info(hdev, "No support for BT device in ACPI firmware");
+		return;
+	}
+
 	memset(&ppag, 0, sizeof(ppag));
 
 	ppag.hdev = hdev;
-	status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
-				     ACPI_UINT32_MAX, NULL,
-				     btintel_ppag_callback, &ppag, NULL);
+	ppag.status = AE_NOT_FOUND;
+	acpi_walk_namespace(ACPI_TYPE_PACKAGE, handle, 1, NULL,
+			    btintel_ppag_callback, &ppag, NULL);
 
-	if (ACPI_FAILURE(status)) {
-		/* Do not log warning message if ACPI entry is not found */
-		if (status == AE_NOT_FOUND)
+	if (ACPI_FAILURE(ppag.status)) {
+		if (ppag.status == AE_NOT_FOUND) {
+			bt_dev_dbg(hdev, "PPAG-BT: ACPI entry not found");
 			return;
-		bt_dev_warn(hdev, "PPAG: ACPI Failure: %s", acpi_format_exception(status));
+		}
 		return;
 	}
 
 	if (ppag.domain != 0x12) {
-		bt_dev_warn(hdev, "PPAG-BT Domain disabled");
+		bt_dev_warn(hdev, "PPAG-BT: domain is not bluetooth");
 		return;
 	}
 
 	/* PPAG mode, BIT0 = 0 Disabled, BIT0 = 1 Enabled */
 	if (!(ppag.mode & BIT(0))) {
-		bt_dev_dbg(hdev, "PPAG disabled");
+		bt_dev_dbg(hdev, "PPAG-BT: disabled");
 		return;
 	}
 

drivers/bluetooth/btintel.h

@@ -137,13 +137,6 @@ struct intel_offload_use_cases {
 	__u8	preset[8];
 } __packed;
 
-/* structure to store the PPAG data read from ACPI table */
-struct btintel_ppag {
-	u32	domain;
-	u32     mode;
-	struct hci_dev *hdev;
-};
-
 struct btintel_loc_aware_reg {
 	__le32 mcc;
 	__le32 sel;

drivers/bluetooth/btqcomsmd.c

@@ -122,6 +122,21 @@ static int btqcomsmd_setup(struct hci_dev *hdev)
 	return 0;
 }
 
+static int btqcomsmd_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	int ret;
+
+	ret = qca_set_bdaddr_rome(hdev, bdaddr);
+	if (ret)
+		return ret;
+
+	/* The firmware stops responding for a while after setting the bdaddr,
+	 * causing timeouts for subsequent commands. Sleep a bit to avoid this.
+	 */
+	usleep_range(1000, 10000);
+	return 0;
+}
+
 static int btqcomsmd_probe(struct platform_device *pdev)
 {
 	struct btqcomsmd *btq;
@@ -162,7 +177,7 @@ static int btqcomsmd_probe(struct platform_device *pdev)
 	hdev->close = btqcomsmd_close;
 	hdev->send = btqcomsmd_send;
 	hdev->setup = btqcomsmd_setup;
-	hdev->set_bdaddr = qca_set_bdaddr_rome;
+	hdev->set_bdaddr = btqcomsmd_set_bdaddr;
 
 	ret = hci_register_dev(hdev);
 	if (ret < 0)

drivers/bluetooth/btsdio.c

@@ -354,6 +354,7 @@ static void btsdio_remove(struct sdio_func *func)
 
 	BT_DBG("func %p", func);
 
+	cancel_work_sync(&data->work);
 	if (!data)
 		return;
 

drivers/bluetooth/btusb.c

@@ -1050,21 +1050,11 @@ static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
 		hci_skb_expect(skb) -= len;
 
 		if (skb->len == HCI_ACL_HDR_SIZE) {
-			__u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
 			__le16 dlen = hci_acl_hdr(skb)->dlen;
-			__u8 type;
 
 			/* Complete ACL header */
 			hci_skb_expect(skb) = __le16_to_cpu(dlen);
 
-			/* Detect if ISO packet has been sent over bulk */
-			if (hci_conn_num(data->hdev, ISO_LINK)) {
-				type = hci_conn_lookup_type(data->hdev,
-							    hci_handle(handle));
-				if (type == ISO_LINK)
-					hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
-			}
-
 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 				kfree_skb(skb);
 				skb = NULL;

include/net/bluetooth/hci_core.h

@@ -1613,6 +1613,7 @@ void hci_conn_add_sysfs(struct hci_conn *conn);
 void hci_conn_del_sysfs(struct hci_conn *conn);
 
 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
+#define GET_HCIDEV_DEV(hdev) ((hdev)->dev.parent)
 
 /* ----- LMP capabilities ----- */
 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)

net/bluetooth/hci_core.c

@@ -2871,10 +2871,25 @@ int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
 		return -ENXIO;
 	}
 
-	if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
-	    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
-	    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
-	    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
+	switch (hci_skb_pkt_type(skb)) {
+	case HCI_EVENT_PKT:
+		break;
+	case HCI_ACLDATA_PKT:
+		/* Detect if ISO packet has been sent as ACL */
+		if (hci_conn_num(hdev, ISO_LINK)) {
+			__u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
+			__u8 type;
+
+			type = hci_conn_lookup_type(hdev, hci_handle(handle));
+			if (type == ISO_LINK)
+				hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
+		}
+		break;
+	case HCI_SCODATA_PKT:
+		break;
+	case HCI_ISODATA_PKT:
+		break;
+	default:
 		kfree_skb(skb);
 		return -EINVAL;
 	}

net/bluetooth/hci_sync.c

@@ -643,13 +643,15 @@ void hci_cmd_sync_clear(struct hci_dev *hdev)
 	cancel_work_sync(&hdev->cmd_sync_work);
 	cancel_work_sync(&hdev->reenable_adv_work);
 
+	mutex_lock(&hdev->cmd_sync_work_lock);
 	list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
 		if (entry->destroy)
 			entry->destroy(hdev, entry->data, -ECANCELED);
 
 		list_del(&entry->list);
 		kfree(entry);
 	}
+	mutex_unlock(&hdev->cmd_sync_work_lock);
 }
 
 void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
@@ -2367,6 +2369,45 @@ static int hci_resume_advertising_sync(struct hci_dev *hdev)
 	return err;
 }
 
+static int hci_pause_addr_resolution(struct hci_dev *hdev)
+{
+	int err;
+
+	if (!use_ll_privacy(hdev))
+		return 0;
+
+	if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
+		return 0;
+
+	/* Cannot disable addr resolution if scanning is enabled or
+	 * when initiating an LE connection.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+	    hci_lookup_le_connect(hdev)) {
+		bt_dev_err(hdev, "Command not allowed when scan/LE connect");
+		return -EPERM;
+	}
+
+	/* Cannot disable addr resolution if advertising is enabled. */
+	err = hci_pause_advertising_sync(hdev);
+	if (err) {
+		bt_dev_err(hdev, "Pause advertising failed: %d", err);
+		return err;
+	}
+
+	err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
+	if (err)
+		bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
+			   err);
+
+	/* Return if address resolution is disabled and RPA is not used. */
+	if (!err && scan_use_rpa(hdev))
+		return err;
+
+	hci_resume_advertising_sync(hdev);
+	return err;
+}
+
 struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
 					     bool extended, struct sock *sk)
 {
@@ -2402,7 +2443,7 @@ static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
 	u8 filter_policy;
 	int err;
 
-	/* Pause advertising if resolving list can be used as controllers are
+	/* Pause advertising if resolving list can be used as controllers
 	 * cannot accept resolving list modifications while advertising.
 	 */
 	if (use_ll_privacy(hdev)) {
@@ -3319,6 +3360,7 @@ static const struct hci_init_stage amp_init1[] = {
 	HCI_INIT(hci_read_flow_control_mode_sync),
 	/* HCI_OP_READ_LOCATION_DATA */
 	HCI_INIT(hci_read_location_data_sync),
+	{}
 };
 
 static int hci_init1_sync(struct hci_dev *hdev)
@@ -3353,6 +3395,7 @@ static int hci_init1_sync(struct hci_dev *hdev)
 static const struct hci_init_stage amp_init2[] = {
 	/* HCI_OP_READ_LOCAL_FEATURES */
 	HCI_INIT(hci_read_local_features_sync),
+	{}
 };
 
 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
@@ -5394,27 +5437,12 @@ static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
 
 	cancel_interleave_scan(hdev);
 
-	/* Pause advertising since active scanning disables address resolution
-	 * which advertising depend on in order to generate its RPAs.
-	 */
-	if (use_ll_privacy(hdev) && hci_dev_test_flag(hdev, HCI_PRIVACY)) {
-		err = hci_pause_advertising_sync(hdev);
-		if (err) {
-			bt_dev_err(hdev, "pause advertising failed: %d", err);
-			goto failed;
-		}
-	}
-
-	/* Disable address resolution while doing active scanning since the
-	 * accept list shall not be used and all reports shall reach the host
-	 * anyway.
+	/* Pause address resolution for active scan and stop advertising if
+	 * privacy is enabled.
 	 */
-	err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
-	if (err) {
-		bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
-			   err);
+	err = hci_pause_addr_resolution(hdev);
+	if (err)
 		goto failed;
-	}
 
 	/* All active scans will be done with either a resolvable private
 	 * address (when privacy feature has been enabled) or non-resolvable

net/bluetooth/iso.c

@@ -1620,7 +1620,6 @@ static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason)
 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
 {
 	struct iso_conn *conn = hcon->iso_data;
-	struct hci_iso_data_hdr *hdr;
 	__u16 pb, ts, len;
 
 	if (!conn)
@@ -1642,22 +1641,28 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
 		}
 
 		if (ts) {
+			struct hci_iso_ts_data_hdr *hdr;
+
 			/* TODO: add timestamp to the packet? */
 			hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE);
 			if (!hdr) {
 				BT_ERR("Frame is too short (len %d)", skb->len);
 				goto drop;
 			}
 
+			len = __le16_to_cpu(hdr->slen);
 		} else {
+			struct hci_iso_data_hdr *hdr;
+
 			hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE);
 			if (!hdr) {
 				BT_ERR("Frame is too short (len %d)", skb->len);
 				goto drop;
 			}
+
+			len = __le16_to_cpu(hdr->slen);
 		}
 
-		len    = __le16_to_cpu(hdr->slen);
 		flags  = hci_iso_data_flags(len);
 		len    = hci_iso_data_len(len);