From: Peter Hurley <peter@hurleysoftware.com>
Date: Mon, 10 Feb 2014 01:59:18 +0000 (-0500)
Subject: Bluetooth: Serialize RFCOMMCREATEDEV and RFCOMMRELEASEDEV ioctls
X-Git-Tag: v3.15-rc1~113^2~159^2^2~130^2~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=033ace99c444daa4141b84419f670513ce637b77;p=pandora-kernel.git

Bluetooth: Serialize RFCOMMCREATEDEV and RFCOMMRELEASEDEV ioctls

At least two different race conditions exist with multiple concurrent
RFCOMMCREATEDEV and RFCOMMRELEASEDEV ioctls:
* Multiple concurrent RFCOMMCREATEDEVs with RFCOMM_REUSE_DLC can
  mistakenly share the same DLC.
* RFCOMMRELEASEDEV can destruct the rfcomm_dev still being
  constructed by RFCOMMCREATEDEV.

Introduce rfcomm_ioctl_mutex to serialize these add/remove operations.

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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