Commit 76458fae authored by Eric Dumazet's avatar Eric Dumazet Committed by Jakub Kicinski
Browse files

net: use DEBUG_NET_WARN_ON_ONCE() in dev_loopback_xmit() 



One check in dev_loopback_xmit() has not caught issues
in the past.

Keep it for CONFIG_DEBUG_NET=y builds only.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 63fbdd3c

net/core/dev.c

+1 −1
Original line number Diff line number Diff line
@@ -3925,7 +3925,7 @@ int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *skb) 
	skb->pkt_type = PACKET_LOOPBACK;

	if (skb->ip_summed == CHECKSUM_NONE)

		skb->ip_summed = CHECKSUM_UNNECESSARY;

	WARN_ON(!skb_dst(skb));

	DEBUG_NET_WARN_ON_ONCE(!skb_dst(skb));

	skb_dst_force(skb);

	netif_rx(skb);

	return 0;