linux-kernel - Re: [PATCH] mISDN: prevent possible NULL pointer dereference

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Date:	Thu, 18 Feb 2016 15:00:04 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	a.s.protopopov@...il.com
Cc:	isdn@...ux-pingi.de, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mISDN: prevent possible NULL pointer dereference

From: Anton Protopopov <a.s.protopopov@...il.com>
Date: Wed, 17 Feb 2016 11:19:56 -0500

> A return value of the bchannel_get_rxbuf() function is compared with the
> positive ENOMEM value instead of the negative -ENOMEM value to detect a
> memory allocation problem. Thus, after a possible memory allocation
> failure the bc->bch.rx_skb will be NULL which will lead to a NULL
> pointer dereference.
> 
> Signed-off-by: Anton Protopopov <a.s.protopopov@...il.com>

Applied.