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linux/net/bluetooth
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Archie Pusaka 2033dde6aa Bluetooth: check for zapped sk before connecting 
[ Upstream commit 3af70b39fa ]

There is a possibility of receiving a zapped sock on
l2cap_sock_connect(). This could lead to interesting crashes, one
such case is tearing down an already tore l2cap_sock as is happened
with this call trace:

__dump_stack lib/dump_stack.c:15 [inline]
dump_stack+0xc4/0x118 lib/dump_stack.c:56
register_lock_class kernel/locking/lockdep.c:792 [inline]
register_lock_class+0x239/0x6f6 kernel/locking/lockdep.c:742
__lock_acquire+0x209/0x1e27 kernel/locking/lockdep.c:3105
lock_acquire+0x29c/0x2fb kernel/locking/lockdep.c:3599
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:137 [inline]
_raw_spin_lock_bh+0x38/0x47 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:307 [inline]
lock_sock_nested+0x44/0xfa net/core/sock.c:2518
l2cap_sock_teardown_cb+0x88/0x2fb net/bluetooth/l2cap_sock.c:1345
l2cap_chan_del+0xa3/0x383 net/bluetooth/l2cap_core.c:598
l2cap_chan_close+0x537/0x5dd net/bluetooth/l2cap_core.c:756
l2cap_chan_timeout+0x104/0x17e net/bluetooth/l2cap_core.c:429
process_one_work+0x7e3/0xcb0 kernel/workqueue.c:2064
worker_thread+0x5a5/0x773 kernel/workqueue.c:2196
kthread+0x291/0x2a6 kernel/kthread.c:211
ret_from_fork+0x4e/0x80 arch/x86/entry/entry_64.S:604

Signed-off-by: Archie Pusaka <apusaka@chromium.org>
Reported-by: syzbot+abfc0f5e668d4099af73@syzkaller.appspotmail.com
Reviewed-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-19 10:12:53 +02:00
..
bnep net: make ->{get,set}sockopt in proto_ops optional 2020-07-19 18:16:41 -07:00
cmtp net: make ->{get,set}sockopt in proto_ops optional 2020-07-19 18:16:41 -07:00
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
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
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
hci_debugfs.h
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
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
leds.h
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
mgmt_util.h
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
smp.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
smp.h