net: bridge: fix multicast-to-unicast with fraglist GSO

Calling skb_copy on a SKB_GSO_FRAGLIST skb is not valid, since it returns
an invalid linearized skb. This code only needs to change the ethernet
header, so pskb_copy is the right function to call here.

Fixes: 6db6f0eae605 ("bridge: multicast to unicast")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 7431f89e897b9549a0c35d9431e36b6de2e80022..d7c35f55bd69fb5e7d3add82a4ce7c48c83b8332 100644 (file)
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -266,7 +266,7 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
        if (skb->dev == p->dev && ether_addr_equal(src, addr))
                return;
 
-       skb = skb_copy(skb, GFP_ATOMIC);
+       skb = pskb_copy(skb, GFP_ATOMIC);
        if (!skb) {
                DEV_STATS_INC(dev, tx_dropped);
                return;