[PATCH v2 2/8] Bluetooth: hci_conn: take hdev lock in set_cig_params_sync

Pauli Virtanen
2025-11-02T16:23:05Z

Take hdev lock to prevent hci_conn from being deleted or modified
concurrently.

Fixes: a091289218202 ("Bluetooth: hci_conn: Fix hci_le_set_cig_params")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
---

Notes:
v2:
- no change

net/bluetooth/hci_conn.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index d6162a95048e..d140e5740f92 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1825,9 +1825,13 @@ static int set_cig_params_sync(struct hci_dev *hdev, void *data)
u8 aux_num_cis = 0;
u8 cis_id;

+ hci_dev_lock(hdev);
+
conn = hci_conn_hash_lookup_cig(hdev, cig_id);
- if (!conn)
+ if (!conn) {
+ hci_dev_unlock(hdev);
return 0;
+ }

qos = &conn->iso_qos;
pdu->cig_id = cig_id;
@@ -1866,6 +1870,8 @@ static int set_cig_params_sync(struct hci_dev *hdev, void *data)
}
pdu->num_cis = aux_num_cis;

+ hci_dev_unlock(hdev);
+
if (!pdu->num_cis)
return 0;

--
2.51.1