[PATCH] NET: ROSE: Don't dereference NULL neighbour pointer.
From: Ralf Baechle <hidden>
Date: 2015-06-18 22:47:03
Also in:
linux-hams, stable
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> Tested-by: Bernard Pidoux <redacted> Cc: stable@vger.kernel.org #2.6.11+
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 8ae6030..dd304bc 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c@@ -192,7 +192,8 @@ 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; } }