linux-kernel - Re: [PATCH 1/4] veth: move loopback logic to common location

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4B0BAC97.6010000@trash.net>
Date:	Tue, 24 Nov 2009 10:51:19 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Stephen Hemminger <shemminger@...tta.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Patrick Mullaney <pmullaney@...ell.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Edge Virtual Bridging <evb@...oogroups.com>,
	Anna Fischer <anna.fischer@...com>,
	bridge@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	Jens Osterkamp <jens@...ux.vnet.ibm.com>,
	Gerhard Stenzel <gerhard.stenzel@...ibm.com>,
	Mark Smith <lk-netdev@...netdev.nosense.org>
Subject: Re: [PATCH 1/4] veth: move loopback logic to common location

Arnd Bergmann wrote:
> +int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
> +{
> +	skb_orphan(skb);
> +
> +	if (!(dev->flags & IFF_UP))
> +		return NET_RX_DROP;
> +
> +	if (skb->len > (dev->mtu + dev->hard_header_len))
> +		return NET_RX_DROP;
> +
> +	skb_dst_drop(skb);
> +	skb->tstamp.tv64 = 0;
> +	skb->pkt_type = PACKET_HOST;
> +	skb->protocol = eth_type_trans(skb, dev);
> +	skb->mark = 0;

skb->mark clearing should stay private to veth since its usually
supposed to stay intact. The only exception is packets crossing
namespaces, where they should appear like a freshly received skbs.

> +	secpath_reset(skb);
> +	nf_reset(skb);
> +	return netif_rx(skb);
> +}
> +EXPORT_SYMBOL_GPL(dev_forward_skb);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/