Lin Ma eeec325c99 bluetooth: eliminate the potential race condition when removing the HCI controller ...

commit e2cb6b891a upstream.

There is a possible race condition vulnerability between issuing a HCI
command and removing the cont.  Specifically, functions hci_req_sync()
and hci_dev_do_close() can race each other like below:

thread-A in hci_req_sync()      |   thread-B in hci_dev_do_close()
                                |   hci_req_sync_lock(hdev);
test_bit(HCI_UP, &hdev->flags); |
...                             |   test_and_clear_bit(HCI_UP, &hdev->flags)
hci_req_sync_lock(hdev);        |
                                |
In this commit we alter the sequence in function hci_req_sync(). Hence,
the thread-A cannot issue th.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Cc: Marcel Holtmann <marcel@holtmann.org>
Fixes: 7c6a329e44 ("[Bluetooth] Fix regression from using default link policy")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-05-14 09:44:10 +02:00

..

bnep

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234

2019-06-19 17:09:07 +02:00

cmtp

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

hidp

Bluetooth: hidp: Fix assumptions on the return value of hidp_send_message

2019-09-06 15:55:40 +02:00

rfcomm

Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl

2020-04-13 10:48:13 +02:00

6lowpan.c

Bluetooth: add a mutex lock to avoid UAF in do_enale_set

2020-08-19 08:15:59 +02:00

a2mp.c

Bluetooth: drop HCI device reference before return

2021-03-04 10:26:14 +01:00

a2mp.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284

2019-06-05 17:36:37 +02:00

af_bluetooth.c

net: use skb_queue_empty_lockless() in poll() handlers

2019-10-28 13:33:41 -07:00

amp.c

Bluetooth: Fix null pointer dereference in amp_read_loc_assoc_final_data

2021-03-07 12:20:45 +01:00

amp.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284

2019-06-05 17:36:37 +02:00

ecdh_helper.c

Bluetooth: let the crypto subsystem generate the ecc privkey

2017-10-06 20:35:47 +02:00

ecdh_helper.h

Fix misc new gcc warnings

2021-05-11 14:04:16 +02:00

hci_conn.c

Bluetooth: Disconnect if E0 is used for Level 4

2020-10-17 10:11:22 +02:00

hci_core.c

Bluetooth: Put HCI device if inquiry procedure interrupts

2021-03-04 10:26:14 +01:00

hci_debugfs.c

Bluetooth: Add debug setting for changing minimum encryption key size

2019-08-17 13:54:40 +03:00

hci_debugfs.h

Bluetooth: Provide option to enable/disable debugfs information

2015-02-15 18:54:13 +02:00

hci_event.c

Bluetooth: verify AMP hci_chan before amp_destroy

2021-05-14 09:44:10 +02:00

hci_request.c

bluetooth: eliminate the potential race condition when removing the HCI controller

2021-05-14 09:44:10 +02:00

hci_request.h

Bluetooth: Use controller sets when available

2019-07-06 15:38:18 +02:00

hci_sock.c

Bluetooth: Fix race condition in hci_release_sock()

2020-02-05 21:22:42 +00:00

hci_sysfs.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-11-04 09:26:51 +09:00

Kconfig

bluetooth: switch to AES library

2019-07-26 14:58:12 +10:00

l2cap_core.c

Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel

2020-10-17 10:11:22 +02:00

l2cap_sock.c

Bluetooth: Only mark socket zapped after unlocking

2020-10-29 09:58:06 +01:00

leds.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

leds.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

lib.c

Bluetooth: make baswap src const

2017-09-01 22:49:47 +02:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mgmt_util.c

networking: make skb_push & __skb_push return void pointers

2017-06-16 11:48:40 -04:00

mgmt_util.h

Bluetooth: Add generic mgmt helper API

2015-03-17 18:03:08 +01:00

mgmt.c

Bluetooth: MGMT: Fix not checking if BT_HS is enabled

2020-10-17 10:11:22 +02:00

sco.c

net: rework SIOCGSTAMP ioctl handling

2019-04-19 14:07:40 -07:00

selftest.c

Bluetooth: Fix compiler warning with selftest duration calculation

2017-10-06 21:49:13 +03:00

selftest.h

Bluetooth: Add support for self testing framework

2014-12-30 08:53:55 +02:00

smp.c

bluetooth: switch to AES library

2019-07-26 14:58:12 +10:00

smp.h

Bluetooth: SMP: fix crash in unpairing

2018-09-26 12:39:32 +03:00