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Message-Id: <20210608152700.30315-5-sw@simonwunderlich.de>
Date: Tue, 8 Jun 2021 17:26:53 +0200
From: Simon Wunderlich <sw@...onwunderlich.de>
To: kuba@...nel.org, davem@...emloft.net
Cc: netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
Linus Lüssing <linus.luessing@...3.blue>,
Sven Eckelmann <sven@...fation.org>,
Simon Wunderlich <sw@...onwunderlich.de>
Subject: [PATCH 04/11] batman-adv: bcast: avoid skb-copy for (re)queued broadcasts
From: Linus Lüssing <linus.luessing@...3.blue>
Broadcast packets send via batadv_send_outstanding_bcast_packet() were
originally copied in batadv_forw_bcast_packet_to_list() before being
queued. And after that only the ethernet header will be pushed through
batadv_send_broadcast_skb()->batadv_send_skb_packet() which works safely
on skb clones as it uses batadv_skb_head_push()->skb_cow_head().
Signed-off-by: Linus Lüssing <linus.luessing@...3.blue>
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Signed-off-by: Simon Wunderlich <sw@...onwunderlich.de>
---
net/batman-adv/send.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 07b0ba265472..0b9dd29d3b6a 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -1072,7 +1072,7 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
}
/* send a copy of the saved skb */
- skb1 = skb_copy(forw_packet->skb, GFP_ATOMIC);
+ skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC);
if (!skb1)
goto out;
--
2.20.1
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