netdev - sch_atm: null dereference

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Date:	Sat, 04 Sep 2010 14:37:52 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
CC:	ML netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: sch_atm: null dereference

Hi,

stanse found a potential null dereference:
atm_tc_change
  -> if (flow)
    -> return -EBUSY;
  -> flow is NULL now
  -> if (classid)
    -> if (!list_empty(&flow->list))

Introduced probably in
    sch_atm: Convert to use standard list_head facilities.

Could you fix that?

regards,
-- 
js
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