netdev - A potential data race in drivers/isdn/hardware/eicon/diva

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Message-ID: <b5d9c5f8-7f52-c499-c5fa-68f72d88f38f@ispras.ru>
Date:	Mon, 15 Aug 2016 17:06:51 +0300
From:	Pavel Andrianov <andrianov@...ras.ru>
To:	mac@...ware.de
Cc:	Karsten Keil <isdn@...ux-pingi.de>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Vaishali Thakkar <vaishali.thakkar@...cle.com>,
	ldv-project@...uxtesting.org
Subject: A potential data race in drivers/isdn/hardware/eicon/diva_mnt.ko

Hi!

There is a potential data race in drivers/isdn/hardware/eicon/diva_mnt.ko

In diva_maint_init there is an initialization of spinlocks (debug.c: 
lines 245, 252) and a queue (debug.c: line 237). These objects are used 
in handlers of divas_main_fops, for instance, divas_maint_read. These 
ops are registered in divas_maint_register_chrdev, which is called 
(divamnt.c: line 206) before initialization (divamnt.c: line 211). Thus, 
there may occur a situation when the handlers of divas_main_fops occur 
to uninitialized resources.

-- 
Pavel Andrianov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org
e-mail: andrianov@...ras.ru