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batman-adv: tt: avoid request storms during pending request

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commit 27c7d40008 upstream.

batadv_send_tt_request() allocates a tt_req_node when none exists for the
destination originator node. This should prevent that a multiple TT
requests are send at the same time to an originator.

But if allocation of the send buffer failed, this request must be cleaned
up again. But indicator for such a failure is "ret == false". But the
actual implementation is checking for "ret == true".

The check must be inverted to not loose the information about the TT
request directly after it was attempted to be sent out. This should avoid
potential request storms.

Cc: stable@vger.kernel.org
Fixes: 335fbe0f5d ("batman-adv: tvlv - convert tt query packet to use tvlv unicast packets")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sven Eckelmann
2026-07-24 16:03:33 +02:00
committed by Greg Kroah-Hartman
parent ddfea9b508
commit 067e413eec
1 changed files with 1 additions and 1 deletions
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net/batman-adv/translation-table.c
+1 -1
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@@ -3032,7 +3032,7 @@ static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
out:
batadv_hardif_put(primary_if);
if (ret && tt_req_node) {
if (!ret && tt_req_node) {
spin_lock_bh(&bat_priv->tt.req_list_lock);
if (!hlist_unhashed(&tt_req_node->list)) {
hlist_del_init(&tt_req_node->list);