linux-stable.git/net/bluetooth, branch v6.4.4

Bluetooth: MGMT: Fix marking SCAN_RSP as not connectable

2023-07-19T14:36:44+00:00

[ Upstream commit 73f55453ea5236a586a7f1b3d5e2ee051d655351 ]

When receiving a scan response there is no way to know if the remote
device is connectable or not, so when it cannot be merged don't
make any assumption and instead just mark it with a new flag defined as
MGMT_DEV_FOUND_SCAN_RSP so userspace can tell it is a standalone
SCAN_RSP.

Link: https://lore.kernel.org/linux-bluetooth/CABBYNZ+CYMsDSPTxBn09Js3BcdC-x7vZFfyLJ3ppZGGwJKmUTw@mail.gmail.com/
Fixes: c70a7e4cc8d2 ("Bluetooth: Add support for Not Connectable flag for Device Found events")
Signed-off-by: Luiz Augusto von Dentz 
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

Bluetooth: ISO: use hci_sync for setting CIG parameters

2023-07-19T14:36:43+00:00

[ Upstream commit 6b9545dc9f8ff01d8bc1229103960d9cd265343f ]

When reconfiguring CIG after disconnection of the last CIS, LE Remove
CIG shall be sent before LE Set CIG Parameters.  Otherwise, it fails
because CIG is in the inactive state and not configurable (Core v5.3
Vol 6 Part B Sec. 4.5.14.3). This ordering is currently wrong under
suitable timing conditions, because LE Remove CIG is sent via the
hci_sync queue and may be delayed, but Set CIG Parameters is via
hci_send_cmd.

Make the ordering well-defined by sending also Set CIG Parameters via
hci_sync.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen 
Signed-off-by: Luiz Augusto von Dentz 
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

Bluetooth: fix invalid-bdaddr quirk for non-persistent setup

2023-07-19T14:36:43+00:00

[ Upstream commit 0cb7365850bacb8c2a9975cae672d65714d8daa1 ]

Devices that lack persistent storage for the device address can indicate
this by setting the HCI_QUIRK_INVALID_BDADDR which causes the controller
to be marked as unconfigured until user space has set a valid address.

Once configured, the device address must be set on every setup for
controllers with HCI_QUIRK_NON_PERSISTENT_SETUP to avoid marking the
controller as unconfigured and requiring the address to be set again.

Fixes: 740011cfe948 ("Bluetooth: Add new quirk for non-persistent setup settings")
Signed-off-by: Johan Hovold 
Signed-off-by: Luiz Augusto von Dentz 
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

Bluetooth: L2CAP: Add missing checks for invalid DCID

2023-06-06T00:24:14+00:00

When receiving a connect response we should make sure that the DCID is
within the valid range and that we don't already have another channel
allocated for the same DCID.
Missing checks may violate the specification (BLUETOOTH CORE SPECIFICATION
Version 5.4 | Vol 3, Part A, Page 1046).

Fixes: 40624183c202 ("Bluetooth: L2CAP: Add missing checks for invalid LE DCID")
Signed-off-by: Sungwoo Kim 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: ISO: use correct CIS order in Set CIG Parameters event

2023-06-06T00:14:07+00:00

The order of CIS handle array in Set CIG Parameters response shall match
the order of the CIS_ID array in the command (Core v5.3 Vol 4 Part E Sec
7.8.97).  We send CIS_IDs mainly in the order of increasing CIS_ID (but
with "last" CIS first if it has fixed CIG_ID).  In handling of the
reply, we currently assume this is also the same as the order of
hci_conn in hdev->conn_hash, but that is not true.

Match the correct hci_conn to the correct handle by matching them based
on the CIG+CIS combination.  The CIG+CIS combination shall be unique for
ISO_LINK hci_conn at state >= BT_BOUND, which we maintain in
hci_le_set_cig_params.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: ISO: don't try to remove CIG if there are bound CIS left

2023-06-06T00:14:07+00:00

Consider existing BOUND & CONNECT state CIS to block CIG removal.
Otherwise, under suitable timing conditions we may attempt to remove CIG
while Create CIS is pending, which fails.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: Fix l2cap_disconnect_req deadlock

2023-06-06T00:13:14+00:00

L2CAP assumes that the locks conn->chan_lock and chan->lock are
acquired in the order conn->chan_lock, chan->lock to avoid
potential deadlock.
For example, l2sock_shutdown acquires these locks in the order:
  mutex_lock(&conn->chan_lock)
  l2cap_chan_lock(chan)

However, l2cap_disconnect_req acquires chan->lock in
l2cap_get_chan_by_scid first and then acquires conn->chan_lock
before calling l2cap_chan_del. This means that these locks are
acquired in unexpected order, which leads to potential deadlock:
  l2cap_chan_lock(c)
  mutex_lock(&conn->chan_lock)

This patch releases chan->lock before acquiring the conn_chan_lock
to avoid the potential deadlock.

Fixes: a2a9339e1c9d ("Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}")
Signed-off-by: Ying Hsu 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: fix debugfs registration

2023-06-06T00:13:14+00:00

Since commit ec6cef9cd98d ("Bluetooth: Fix SMP channel registration for
unconfigured controllers") the debugfs interface for unconfigured
controllers will be created when the controller is configured.

There is however currently nothing preventing a controller from being
configured multiple time (e.g. setting the device address using btmgmt)
which results in failed attempts to register the already registered
debugfs entries:

	debugfs: File 'features' in directory 'hci0' already present!
	debugfs: File 'manufacturer' in directory 'hci0' already present!
	debugfs: File 'hci_version' in directory 'hci0' already present!
	...
	debugfs: File 'quirk_simultaneous_discovery' in directory 'hci0' already present!

Add a controller flag to avoid trying to register the debugfs interface
more than once.

Fixes: ec6cef9cd98d ("Bluetooth: Fix SMP channel registration for unconfigured controllers")
Cc: stable@vger.kernel.org      # 4.0
Signed-off-by: Johan Hovold 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: hci_sync: add lock to protect HCI_UNREGISTER

2023-06-06T00:13:14+00:00

When the HCI_UNREGISTER flag is set, no jobs should be scheduled. Fix
potential race when HCI_UNREGISTER is set after the flag is tested in
hci_cmd_sync_queue.

Fixes: 0b94f2651f56 ("Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set")
Signed-off-by: Zhengping Jiang 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk

2023-06-06T00:13:14+00:00

Similar to commit 0f7d9b31ce7a ("netfilter: nf_tables: fix use-after-free
in nft_set_catchall_destroy()"). We can not access k after kfree_rcu()
call.

Cc: stable@vger.kernel.org
Signed-off-by: Min Li 
Signed-off-by: Luiz Augusto von Dentz