6.12-stable review patch. If anyone has any objections, please let me know.
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From: Alessandro Gasbarroni alex.gasbarroni@gmail.com
[ Upstream commit d85edab911a4c1fcbe3f08336eff5c7feec567d0 ]
Currently, the connectable flag used by the setup of an extended advertising instance drives whether we require privacy when trying to pass a random address to the advertising parameters (Own Address). If privacy is not required, then it automatically falls back to using the controller's public address. This can cause problems when using controllers that do not have a public address set, but instead use a static random address.
e.g. Assume a BLE controller that does not have a public address set. The controller upon powering is set with a random static address by default by the kernel.
< HCI Command: LE Set Random Address (0x08|0x0005) plen 6 Address: E4:AF:26:D8:3E:3A (Static) > HCI Event: Command Complete (0x0e) plen 4 LE Set Random Address (0x08|0x0005) ncmd 1 Status: Success (0x00)
Setting non-connectable extended advertisement parameters in bluetoothctl mgmt
add-ext-adv-params -r 0x801 -x 0x802 -P 2M -g 1
correctly sets Own address type as Random
< HCI Command: LE Set Extended Advertising Parameters (0x08|0x0036) plen 25 ... Own address type: Random (0x01)
Setting connectable extended advertisement parameters in bluetoothctl mgmt
add-ext-adv-params -r 0x801 -x 0x802 -P 2M -g -c 1
mistakenly sets Own address type to Public (which causes to use Public Address 00:00:00:00:00:00)
< HCI Command: LE Set Extended Advertising Parameters (0x08|0x0036) plen 25 ... Own address type: Public (0x00)
This causes either the controller to emit an Invalid Parameters error or to mishandle the advertising.
This patch makes sure that we use the already set static random address when requesting a connectable extended advertising when we don't require privacy and our public address is not set (00:00:00:00:00:00).
Fixes: 3fe318ee72c5 ("Bluetooth: move hci_get_random_address() to hci_sync") Signed-off-by: Alessandro Gasbarroni alex.gasbarroni@gmail.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/hci_sync.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index bc01135e43f3e..bbd809414b2f2 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -6789,8 +6789,8 @@ int hci_get_random_address(struct hci_dev *hdev, bool require_privacy, return 0; }
- /* No privacy so use a public address. */ - *own_addr_type = ADDR_LE_DEV_PUBLIC; + /* No privacy, use the current address */ + hci_copy_identity_address(hdev, rand_addr, own_addr_type);
return 0; }