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authorLinus Lüssing <linus.luessing@c0d3.blue>2020-07-23 15:28:08 +0300
committerSimon Wunderlich <sw@simonwunderlich.de>2020-08-18 20:40:03 +0300
commitd8bf0c01642275c7dca1e5d02c34e4199c200b1f (patch)
treefa7fe9fef5869f415c1614c240d9f12d7d00b920 /net/batman-adv
parent303216e76dcab6049c9d42390b1032f0649a8206 (diff)
downloadlinux-d8bf0c01642275c7dca1e5d02c34e4199c200b1f.tar.xz
batman-adv: Fix own OGM check in aggregated OGMs
The own OGM check is currently misplaced and can lead to the following issues: For one thing we might receive an aggregated OGM from a neighbor node which has our own OGM in the first place. We would then not only skip our own OGM but erroneously also any other, following OGM in the aggregate. For another, we might receive an OGM aggregate which has our own OGM in a place other then the first one. Then we would wrongly not skip this OGM, leading to populating the orginator and gateway table with ourself. Fixes: 9323158ef9f4 ("batman-adv: OGMv2 - implement originators logic") Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/bat_v_ogm.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
index 0f8495b9eeb1..717fe657561d 100644
--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c
@@ -881,6 +881,12 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
ntohl(ogm_packet->seqno), ogm_throughput, ogm_packet->ttl,
ogm_packet->version, ntohs(ogm_packet->tvlv_len));
+ if (batadv_is_my_mac(bat_priv, ogm_packet->orig)) {
+ batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+ "Drop packet: originator packet from ourself\n");
+ return;
+ }
+
/* If the throughput metric is 0, immediately drop the packet. No need
* to create orig_node / neigh_node for an unusable route.
*/
@@ -1008,11 +1014,6 @@ int batadv_v_ogm_packet_recv(struct sk_buff *skb,
if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
goto free_skb;
- ogm_packet = (struct batadv_ogm2_packet *)skb->data;
-
- if (batadv_is_my_mac(bat_priv, ogm_packet->orig))
- goto free_skb;
-
batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX);
batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES,
skb->len + ETH_HLEN);