From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20150912225608.678574987@1wt.eu> Date: Sun, 13 Sep 2015 00:56:55 +0200 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ralf Baechle , Bernard Pidoux , "David S. Miller" , Ben Hutchings , Willy Tarreau Subject: [PATCH 2.6.32 49/62] NET: ROSE: Dont dereference NULL neighbour pointer. MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 In-Reply-To: <08d3b586eb2e764308c3de9ee398a17c@local> Sender: linux-kernel-owner@vger.kernel.org List-ID: 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Ralf Baechle commit d496f7842aada20c61e6044b3395383fa972872c upstream. A ROSE socket doesn't necessarily always have a neighbour pointer so check if the neighbour pointer is valid before dereferencing it. Signed-off-by: Ralf Baechle Tested-by: Bernard Pidoux Signed-off-by: David S. Miller Signed-off-by: Ben Hutchings (cherry picked from commit 8bbe4f448c01949084ef404eded3622086f052a6) Signed-off-by: Willy Tarreau --- net/rose/af_rose.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index 7119ea6..4457e9a 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -194,7 +194,8 @@ static void rose_kill_by_device(struct net_device *dev) if (rose->device == dev) { rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); - rose->neighbour->use--; + if (rose->neighbour) + rose->neighbour->use--; rose->device = NULL; } } -- 1.7.12.2.21.g234cd45.dirty