Thadeu Lima de Souza Cascardo 1b364f8ede Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails ... commit 8da3a0b87f4f1c3a3bbc4bfb78cf68476e97d183 upstream. When cmtp_attach_device fails, cmtp_add_connection returns the error value which leads to the caller to doing fput through sockfd_put. But cmtp_session kthread, which is stopped in this path will also call fput, leading to a potential refcount underflow or a use-after-free. Add a refcount before we signal the kthread to stop. The kthread will try to grab the cmtp_session_sem mutex before doing the fput, which is held when get_file is called, so there should be no races there. Reported-by: Ryota Shiga Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-06-03 09:00:35 +02:00
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bnep	net: make ->{get,set}sockopt in proto_ops optional	2020-07-19 18:16:41 -07:00
cmtp	Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails	2021-06-03 09:00:35 +02:00
hidp	net: make ->{get,set}sockopt in proto_ops optional	2020-07-19 18:16:41 -07:00
rfcomm	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	2020-07-31 15:11:52 -07:00
6lowpan.c	Bluetooth: add a mutex lock to avoid UAF in do_enale_set	2020-06-23 14:30:07 +02:00
a2mp.c	Bluetooth: drop HCI device reference before return	2021-03-04 11:37:25 +01:00
a2mp.h	Bluetooth: Replace zero-length array with flexible-array member	2020-02-28 08:30:02 +01:00
af_bluetooth.c	Bluetooth: Add support for BT_PKT_STATUS CMSG data for SCO connections	2020-06-12 15:08:49 +02:00
amp.c	Bluetooth: Fix null pointer dereference in amp_read_loc_assoc_final_data	2021-03-07 12:34:10 +01:00
amp.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284	2019-06-05 17:36:37 +02:00
ecdh_helper.c	mm, treewide: rename kzfree() to kfree_sensitive()	2020-08-07 11:33:22 -07:00
ecdh_helper.h	Fix misc new gcc warnings	2021-05-11 14:47:36 +02:00
hci_conn.c	Bluetooth: avoid deadlock between hci_dev->lock and socket lock	2021-05-14 09:50:29 +02:00
hci_core.c	Bluetooth: Add new HCI_QUIRK_NO_SUSPEND_NOTIFIER quirk	2021-03-07 12:34:10 +01:00
hci_debugfs.c	Bluetooth: debugfs option to unset MITM flag	2020-04-07 18:32:21 +02:00
hci_debugfs.h	Bluetooth: Provide option to enable/disable debugfs information	2015-02-15 18:54:13 +02:00
hci_event.c	Bluetooth: Fix incorrect status handling in LE PHY UPDATE event	2021-05-19 10:12:52 +02:00
hci_request.c	bluetooth: eliminate the potential race condition when removing the HCI controller	2021-05-14 09:49:55 +02:00
hci_request.h	Bluetooth: Enable/Disable address resolution during le create conn	2020-07-30 09:34:43 +02:00
hci_sock.c	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	2020-07-31 15:11:52 -07:00
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: Disable High Speed by default	2020-09-25 20:21:55 +02:00
l2cap_core.c	Bluetooth: initialize skb_queue_head at l2cap_chan_create()	2021-05-19 10:12:53 +02:00
l2cap_sock.c	Bluetooth: check for zapped sk before connecting	2021-05-19 10:12:53 +02:00
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: Introduce debug feature when dynamic debug is disabled	2020-05-11 12:16:27 +02:00
Makefile	Bluetooth: implement read/set default system parameters mgmt	2020-06-12 21:41:07 +02:00
mgmt_config.c	Bluetooth: Adding a configurable autoconnect timeout	2020-07-07 17:37:03 +02:00
mgmt_config.h	Bluetooth: mgmt: Add commands for runtime configuration	2020-06-18 13:11:03 +03:00
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	2020-09-25 20:21:55 +02:00
msft.c	Bluetooth: Replace zero-length array with flexible-array member	2020-10-29 17:22:59 -05:00
msft.h	Bluetooth: Add handler of MGMT_OP_READ_ADV_MONITOR_FEATURES	2020-06-18 13:11:21 +03:00
sco.c	Bluetooth: sco: Fix crash when using BT_SNDMTU/BT_RCVMTU option	2020-12-30 11:53:40 +01:00
selftest.c	Bluetooth: Remove CRYPTO_ALG_INTERNAL flag	2020-07-31 16:42:04 +03:00
selftest.h	Bluetooth: Add support for self testing framework	2014-12-30 08:53:55 +02:00
smp.c	Bluetooth: SMP: Fail if remote and local public keys are identical	2021-05-26 12:06:57 +02:00
smp.h	Bluetooth: SMP: fix crash in unpairing	2018-09-26 12:39:32 +03:00