From: Szymon Janc szymon.janc@codecoup.pl
commit 1d87b88ba26eabd4745e158ecfd87c93a9b51dc2 upstream.
Microsoft Surface Precision Mouse provides bogus identity address when pairing. It connects with Static Random address but provides Public Address in SMP Identity Address Information PDU. Address has same value but type is different. Workaround this by dropping IRK if ID address discrepancy is detected.
HCI Event: LE Meta Event (0x3e) plen 19
LE Connection Complete (0x01) Status: Success (0x00) Handle: 75 Role: Master (0x00) Peer address type: Random (0x01) Peer address: E0:52:33:93:3B:21 (Static) Connection interval: 50.00 msec (0x0028) Connection latency: 0 (0x0000) Supervision timeout: 420 msec (0x002a) Master clock accuracy: 0x00
....
ACL Data RX: Handle 75 flags 0x02 dlen 12
SMP: Identity Address Information (0x09) len 7 Address type: Public (0x00) Address: E0:52:33:93:3B:21
Signed-off-by: Szymon Janc szymon.janc@codecoup.pl Tested-by: Maarten Fonville maarten.fonville@gmail.com Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199461 Cc: stable@vger.kernel.org Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/bluetooth/smp.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
--- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -2580,6 +2580,19 @@ static int smp_cmd_ident_addr_info(struc goto distribute; }
+ /* Drop IRK if peer is using identity address during pairing but is + * providing different address as identity information. + * + * Microsoft Surface Precision Mouse is known to have this bug. + */ + if (hci_is_identity_address(&hcon->dst, hcon->dst_type) && + (bacmp(&info->bdaddr, &hcon->dst) || + info->addr_type != hcon->dst_type)) { + bt_dev_err(hcon->hdev, + "ignoring IRK with invalid identity address"); + goto distribute; + } + bacpy(&smp->id_addr, &info->bdaddr); smp->id_addr_type = info->addr_type;