netdev - [PATCH 1/2] batman-adv: fix tt_local_reset

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Message-Id: <1318971669-941-2-git-send-email-lindner_marek@yahoo.de>
Date:	Tue, 18 Oct 2011 23:01:08 +0200
From:	Marek Lindner <lindner_marek@...oo.de>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	Antonio Quartulli <ordex@...istici.org>,
	Marek Lindner <lindner_marek@...oo.de>
Subject: [PATCH 1/2] batman-adv: fix tt_local_reset_flags() function

From: Antonio Quartulli <ordex@...istici.org>

Currently the counter of tt_local_entry structures (tt_local_num) is incremented
each time the tt_local_reset_flags() is invoked causing the node to send wrong
TT_REPONSE packets containing a copy of non-initialised memory thus corrupting
other nodes global translation table and making higher level communication
impossible.

Reported-by: Junkeun Song <jun361@...il.com>
Signed-off-by: Antonio Quartulli <ordex@...istici.org>
Acked-by: Junkeun Song <jun361@...il.com>
Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
---
 net/batman-adv/translation-table.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index fb6931d..f599db9 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1668,6 +1668,8 @@ static void tt_local_reset_flags(struct bat_priv *bat_priv, uint16_t flags)
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(tt_local_entry, node,
 					 head, hash_entry) {
+			if (!(tt_local_entry->flags & flags))
+				continue;
 			tt_local_entry->flags &= ~flags;
 			atomic_inc(&bat_priv->num_local_tt);
 		}
-- 
1.7.5.4

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