From ec48a3d82718e9b32d9284dcda09e87641d15a38 Mon Sep 17 00:00:00 2001 From: Luiz Augusto von Dentz Date: Sun, 3 Nov 2019 23:58:15 +0200 Subject: [PATCH] Bluetooth: Fix advertising duplicated flags [ Upstream commit 6012b9346d8959194c239fd60a62dfec98d43048 ] Instances may have flags set as part of its data in which case the code should not attempt to add it again otherwise it can cause duplication: < HCI Command: LE Set Extended Advertising Data (0x08|0x0037) plen 35 Handle: 0x00 Operation: Complete extended advertising data (0x03) Fragment preference: Minimize fragmentation (0x01) Data length: 0x06 Flags: 0x04 BR/EDR Not Supported Flags: 0x06 LE General Discoverable Mode BR/EDR Not Supported Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Johan Hedberg Signed-off-by: Sasha Levin --- net/bluetooth/hci_request.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c index 7f6a581b5b7e..3d25dbf10b26 100644 --- a/net/bluetooth/hci_request.c +++ b/net/bluetooth/hci_request.c @@ -1273,6 +1273,14 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr) instance_flags = get_adv_instance_flags(hdev, instance); + /* If instance already has the flags set skip adding it once + * again. + */ + if (adv_instance && eir_get_data(adv_instance->adv_data, + adv_instance->adv_data_len, EIR_FLAGS, + NULL)) + goto skip_flags; + /* The Add Advertising command allows userspace to set both the general * and limited discoverable flags. */ @@ -1305,6 +1313,7 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr) } } +skip_flags: if (adv_instance) { memcpy(ptr, adv_instance->adv_data, adv_instance->adv_data_len);