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authorMarek Lindner <mareklindner@neomailbox.ch>2014-04-24 03:44:25 +0800
committerAntonio Quartulli <antonio@meshcoding.com>2014-05-15 20:03:16 +0200
commit16a4142363b11952d3aa76ac78004502c0c2fe6e (patch)
tree25f87cddc1fc4d1ac36fc28fe7f33959335d40e7 /net/batman-adv
parente84d2f8d2ae33c8215429824e1ecf24cbca9645e (diff)
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>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/originator.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 1785da37b82c..6a484514cd3e 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -1079,7 +1079,8 @@ int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface);
out:
- batadv_hardif_free_ref(hard_iface);
+ if (hard_iface)
+ batadv_hardif_free_ref(hard_iface);
return 0;
}