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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-02-10 01:59:09 (GMT) |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-02-14 21:39:30 (GMT) |
| commit | c949c224cfd7d5445ef947e8b93c0657323d5be5 (patch) | |
| tree | 99a229dec8e8b61a37ee0469aa45be3d38bfc397 /net/bluetooth/rfcomm/core.c | |
| parent | 80ea73378af46b0023eb2f400d26c2a60248ffaa (diff) | |
| download | linux-c949c224cfd7d5445ef947e8b93c0657323d5be5.tar.xz | |
Bluetooth: Fix RFCOMM tty teardown race
RFCOMM tty device teardown can race with new tty device registration
for the same device id:
CPU 0 | CPU 1
rfcomm_dev_add | rfcomm_dev_destruct
| spin_lock
| list_del <== dev_id no longer used
| spin_unlock
spin_lock | .
[search rfcomm_dev_list] | .
[dev_id not in use] | .
[initialize new rfcomm_dev] | .
spin_unlock | .
| .
tty_port_register_device | tty_unregister_device
Don't remove rfcomm_dev from the device list until after tty device
unregistration has completed.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Tested-By: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/rfcomm/core.c')
0 files changed, 0 insertions, 0 deletions