Bluetooth: Exclude released devices from RFCOMMGETDEVLIST ioctl

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When enumerating RFCOMM devices in the rfcomm_dev_list, holding
the rfcomm_dev_lock only guarantees the existence of the enumerated
rfcomm_dev in memory, and not safe access to its state. Testing
the device state (such as RFCOMM_TTY_RELEASED) does not guarantee
the device will remain in that state for the subsequent access
to the rfcomm_dev's fields, nor guarantee that teardown has not
commenced.

Obtain an rfcomm_dev reference for the duration of rfcomm_dev
access.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Tested-By: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

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Peter Hurley 2014-02-09 20:59:06 -05:00 • committed by Marcel Holtmann

parent 082a1532fc

commit 960603a54a

1 changed files with 2 additions and 1 deletions

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net/bluetooth/rfcomm/tty.c

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