From 16a4142363b11952d3aa76ac78004502c0c2fe6e Mon Sep 17 00:00:00 2001
From: Marek Lindner <mareklindner@neomailbox.ch>
Date: Thu, 24 Apr 2014 03:44:25 +0800
Subject: [PATCH] batman-adv: fix indirect hard_iface NULL dereference

If hard_iface is NULL and goto out is made batadv_hardif_free_ref()
doesn't check for NULL before dereferencing it to get to refcount.

Introduced in cb1c92ec37fb70543d133a1fa7d9b54d6f8a1ecd
("batman-adv: add debugfs support to view multiif tables").

Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Acked-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
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