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batman-adv: bcast: avoid skb-copy for (re)queued broadcasts 

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@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Linus Lüssing 2021-05-17 00:33:08 +02:00 committed by Simon Wunderlich
parent 3f69339068
commit 4cbf055002
1 changed files with 1 additions and 1 deletions
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2
net/batman-adv/send.c
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@ -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;