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Bluetooth: Fix advertising duplicated flags

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[ 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 <luiz.von.dentz@intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Luiz Augusto von Dentz 2019-11-03 23:58:15 +02:00 committed by Greg Kroah-Hartman
parent 07debac18a
commit ccb2bae300
1 changed files with 9 additions and 0 deletions
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9
net/bluetooth/hci_request.c
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@ -1095,6 +1095,14 @@ 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.
*/
@ -1127,6 +1135,7 @@ 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);