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authorSimon Wunderlich <sw@simonwunderlich.de>2015-09-02 20:09:55 +0200
committerAntonio Quartulli <antonio@meshcoding.com>2015-12-07 21:58:14 +0800
commita6cb390940b622eb0893519a54989222234f7c4b (patch)
treef742ae50dd6a45b8ddf0ede8e48db1761e19ea18 /net
parent437bb0e645d9286a97508d24dd9a4a7a7fa86b93 (diff)
downloadop-kernel-dev-a6cb390940b622eb0893519a54989222234f7c4b.zip
op-kernel-dev-a6cb390940b622eb0893519a54989222234f7c4b.tar.gz
batman-adv: avoid keeping false temporary entry
In the case when a temporary entry is added first and a proper tt entry is added after that, the temporary tt entry is kept in the orig list. However the temporary flag is removed at this point, and therefore the purge function can not find this temporary entry anymore. Therefore, remove the previous temp entry before adding the new proper one. This case can happen if a client behind a given originator moves before the TT announcement is sent out. Other than that, this case can also be created by bogus or malicious payload frames for VLANs which are not existent on the sending originator. Reported-by: Alessandro Bolletta <alessandro@mediaspot.net> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Acked-by: Antonio Quartulli <antonio@meshcoding.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/translation-table.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 4228b10..a3fc903 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1427,9 +1427,15 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
}
/* if the client was temporary added before receiving the first
- * OGM announcing it, we have to clear the TEMP flag
+ * OGM announcing it, we have to clear the TEMP flag. Also,
+ * remove the previous temporary orig node and re-add it
+ * if required. If the orig entry changed, the new one which
+ * is a non-temporary entry is preferred.
*/
- common->flags &= ~BATADV_TT_CLIENT_TEMP;
+ if (common->flags & BATADV_TT_CLIENT_TEMP) {
+ batadv_tt_global_del_orig_list(tt_global_entry);
+ common->flags &= ~BATADV_TT_CLIENT_TEMP;
+ }
/* the change can carry possible "attribute" flags like the
* TT_CLIENT_WIFI, therefore they have to be copied in the
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