This is a note to let you know that I've just added the patch titled
Bluetooth: Make handle of hci_conn be unique
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-make-handle-of-hci_conn-be-unique.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dc5aa311dcd06571dd8b48c778c43e5134f8c75c
Author: Ziyang Xuan <william.xuanziyang@xxxxxxxxxx>
Date: Wed Oct 11 17:57:31 2023 +0800
Bluetooth: Make handle of hci_conn be unique
[ Upstream commit 181a42edddf51d5d9697ecdf365d72ebeab5afb0 ]
The handle of new hci_conn is always HCI_CONN_HANDLE_MAX + 1 if
the handle of the first hci_conn entry in hci_dev->conn_hash->list
is not HCI_CONN_HANDLE_MAX + 1. Use ida to manage the allocation of
hci_conn->handle to make it be unique.
Fixes: 9f78191cc9f1 ("Bluetooth: hci_conn: Always allocate unique handles")
Signed-off-by: Ziyang Xuan <william.xuanziyang@xxxxxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index f36c1fd5d64ed..7fa95b72e5c85 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -350,6 +350,8 @@ struct hci_dev {
struct list_head list;
struct mutex lock;
+ struct ida unset_handle_ida;
+
const char *name;
unsigned long flags;
__u16 id;
@@ -1449,7 +1451,9 @@ int hci_le_create_cis_pending(struct hci_dev *hdev);
int hci_conn_check_create_cis(struct hci_conn *conn);
struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
- u8 role);
+ u8 role, u16 handle);
+struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
+ bdaddr_t *dst, u8 role);
void hci_conn_del(struct hci_conn *conn);
void hci_conn_hash_flush(struct hci_dev *hdev);
void hci_conn_check_pending(struct hci_dev *hdev);
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 2134f92bd7ac2..5d698f19868c5 100644
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -109,7 +109,7 @@ struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
struct hci_conn *hcon;
u8 role = out ? HCI_ROLE_MASTER : HCI_ROLE_SLAVE;
- hcon = hci_conn_add(hdev, AMP_LINK, dst, role);
+ hcon = hci_conn_add(hdev, AMP_LINK, dst, role, __next_handle(mgr));
if (!hcon)
return NULL;
@@ -117,7 +117,6 @@ struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
hcon->state = BT_CONNECT;
hcon->attempt++;
- hcon->handle = __next_handle(mgr);
hcon->remote_id = remote_id;
hcon->amp_mgr = amp_mgr_get(mgr);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index c476154f3a5d2..7450b550cff6d 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -153,6 +153,9 @@ static void hci_conn_cleanup(struct hci_conn *conn)
hci_conn_hash_del(hdev, conn);
+ if (HCI_CONN_HANDLE_UNSET(conn->handle))
+ ida_free(&hdev->unset_handle_ida, conn->handle);
+
if (conn->cleanup)
conn->cleanup(conn);
@@ -928,31 +931,18 @@ static void cis_cleanup(struct hci_conn *conn)
hci_le_remove_cig(hdev, conn->iso_qos.ucast.cig);
}
-static u16 hci_conn_hash_alloc_unset(struct hci_dev *hdev)
+static int hci_conn_hash_alloc_unset(struct hci_dev *hdev)
{
- struct hci_conn_hash *h = &hdev->conn_hash;
- struct hci_conn *c;
- u16 handle = HCI_CONN_HANDLE_MAX + 1;
-
- rcu_read_lock();
-
- list_for_each_entry_rcu(c, &h->list, list) {
- /* Find the first unused handle */
- if (handle == 0xffff || c->handle != handle)
- break;
- handle++;
- }
- rcu_read_unlock();
-
- return handle;
+ return ida_alloc_range(&hdev->unset_handle_ida, HCI_CONN_HANDLE_MAX + 1,
+ U16_MAX, GFP_ATOMIC);
}
struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
- u8 role)
+ u8 role, u16 handle)
{
struct hci_conn *conn;
- BT_DBG("%s dst %pMR", hdev->name, dst);
+ bt_dev_dbg(hdev, "dst %pMR handle 0x%4.4x", dst, handle);
conn = kzalloc(sizeof(*conn), GFP_KERNEL);
if (!conn)
@@ -960,7 +950,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
bacpy(&conn->dst, dst);
bacpy(&conn->src, &hdev->bdaddr);
- conn->handle = hci_conn_hash_alloc_unset(hdev);
+ conn->handle = handle;
conn->hdev = hdev;
conn->type = type;
conn->role = role;
@@ -1045,6 +1035,20 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
return conn;
}
+struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
+ bdaddr_t *dst, u8 role)
+{
+ int handle;
+
+ bt_dev_dbg(hdev, "dst %pMR", dst);
+
+ handle = hci_conn_hash_alloc_unset(hdev);
+ if (unlikely(handle < 0))
+ return NULL;
+
+ return hci_conn_add(hdev, type, dst, role, handle);
+}
+
static void hci_conn_cleanup_child(struct hci_conn *conn, u8 reason)
{
if (!reason)
@@ -1275,6 +1279,9 @@ u8 hci_conn_set_handle(struct hci_conn *conn, u16 handle)
if (conn->abort_reason)
return conn->abort_reason;
+ if (HCI_CONN_HANDLE_UNSET(conn->handle))
+ ida_free(&hdev->unset_handle_ida, conn->handle);
+
conn->handle = handle;
return 0;
@@ -1382,7 +1389,7 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
if (conn) {
bacpy(&conn->dst, dst);
} else {
- conn = hci_conn_add(hdev, LE_LINK, dst, role);
+ conn = hci_conn_add_unset(hdev, LE_LINK, dst, role);
if (!conn)
return ERR_PTR(-ENOMEM);
hci_conn_hold(conn);
@@ -1547,7 +1554,7 @@ static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
memcmp(conn->le_per_adv_data, base, base_len)))
return ERR_PTR(-EADDRINUSE);
- conn = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
+ conn = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
if (!conn)
return ERR_PTR(-ENOMEM);
@@ -1591,7 +1598,7 @@ struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
BT_DBG("requesting refresh of dst_addr");
- conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
+ conn = hci_conn_add_unset(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
if (!conn)
return ERR_PTR(-ENOMEM);
@@ -1639,7 +1646,7 @@ struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
if (!acl) {
- acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
+ acl = hci_conn_add_unset(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
if (!acl)
return ERR_PTR(-ENOMEM);
}
@@ -1699,7 +1706,7 @@ struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
sco = hci_conn_hash_lookup_ba(hdev, type, dst);
if (!sco) {
- sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
+ sco = hci_conn_add_unset(hdev, type, dst, HCI_ROLE_MASTER);
if (!sco) {
hci_conn_drop(acl);
return ERR_PTR(-ENOMEM);
@@ -1891,7 +1898,7 @@ struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type, qos->ucast.cig,
qos->ucast.cis);
if (!cis) {
- cis = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
+ cis = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
if (!cis)
return ERR_PTR(-ENOMEM);
cis->cleanup = cis_cleanup;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 195aea2198a96..65601aa52e0d8 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2535,6 +2535,8 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
mutex_init(&hdev->lock);
mutex_init(&hdev->req_lock);
+ ida_init(&hdev->unset_handle_ida);
+
INIT_LIST_HEAD(&hdev->mesh_pending);
INIT_LIST_HEAD(&hdev->mgmt_pending);
INIT_LIST_HEAD(&hdev->reject_list);
@@ -2789,6 +2791,7 @@ void hci_release_dev(struct hci_dev *hdev)
hci_codec_list_clear(&hdev->local_codecs);
hci_dev_unlock(hdev);
+ ida_destroy(&hdev->unset_handle_ida);
ida_simple_remove(&hci_index_ida, hdev->id);
kfree_skb(hdev->sent_cmd);
kfree_skb(hdev->recv_event);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 9b34c9f8ee02c..f6d3150bcbb03 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2335,8 +2335,8 @@ static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
}
} else {
if (!conn) {
- conn = hci_conn_add(hdev, ACL_LINK, &cp->bdaddr,
- HCI_ROLE_MASTER);
+ conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
+ HCI_ROLE_MASTER);
if (!conn)
bt_dev_err(hdev, "no memory for new connection");
}
@@ -3151,8 +3151,8 @@ static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
&ev->bdaddr,
BDADDR_BREDR)) {
- conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
- HCI_ROLE_SLAVE);
+ conn = hci_conn_add_unset(hdev, ev->link_type,
+ &ev->bdaddr, HCI_ROLE_SLAVE);
if (!conn) {
bt_dev_err(hdev, "no memory for new conn");
goto unlock;
@@ -3317,8 +3317,8 @@ static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
&ev->bdaddr);
if (!conn) {
- conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
- HCI_ROLE_SLAVE);
+ conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
+ HCI_ROLE_SLAVE);
if (!conn) {
bt_dev_err(hdev, "no memory for new connection");
goto unlock;
@@ -5890,7 +5890,7 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
if (status)
goto unlock;
- conn = hci_conn_add(hdev, LE_LINK, bdaddr, role);
+ conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
if (!conn) {
bt_dev_err(hdev, "no memory for new connection");
goto unlock;
@@ -5952,17 +5952,11 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
- if (handle > HCI_CONN_HANDLE_MAX) {
- bt_dev_err(hdev, "Invalid handle: 0x%4.4x > 0x%4.4x", handle,
- HCI_CONN_HANDLE_MAX);
- status = HCI_ERROR_INVALID_PARAMETERS;
- }
-
/* All connection failure handling is taken care of by the
* hci_conn_failed function which is triggered by the HCI
* request completion callbacks used for connecting.
*/
- if (status)
+ if (status || hci_conn_set_handle(conn, handle))
goto unlock;
/* Drop the connection if it has been aborted */
@@ -5986,7 +5980,6 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
mgmt_device_connected(hdev, conn, NULL, 0);
conn->sec_level = BT_SECURITY_LOW;
- conn->handle = handle;
conn->state = BT_CONFIG;
/* Store current advertising instance as connection advertising instance
@@ -6622,8 +6615,8 @@ static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
if (ev->status) {
/* Add connection to indicate the failed PA sync event */
- pa_sync = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
- HCI_ROLE_SLAVE);
+ pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
+ HCI_ROLE_SLAVE);
if (!pa_sync)
goto unlock;
@@ -7019,12 +7012,12 @@ static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
if (!cis) {
- cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE);
+ cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
+ cis_handle);
if (!cis) {
hci_le_reject_cis(hdev, ev->cis_handle);
goto unlock;
}
- cis->handle = cis_handle;
}
cis->iso_qos.ucast.cig = ev->cig_id;
@@ -7139,10 +7132,9 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
bis = hci_conn_hash_lookup_handle(hdev, handle);
if (!bis) {
bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
- HCI_ROLE_SLAVE);
+ HCI_ROLE_SLAVE, handle);
if (!bis)
continue;
- bis->handle = handle;
}
if (ev->status != 0x42)
@@ -7208,8 +7200,8 @@ static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
goto unlock;
/* Add connection to indicate the PA sync event */
- pa_sync = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
- HCI_ROLE_SLAVE);
+ pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
+ HCI_ROLE_SLAVE);
if (!pa_sync)
goto unlock;
