netdev - Re: [PATCH] vlan: remove receive checks for bonding

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: <30741.1271114396@death.nxdomain.ibm.com>
Date:	Mon, 12 Apr 2010 16:19:56 -0700
From:	Jay Vosburgh <fubar@...ibm.com>
To:	Chris Leech <christopher.leech@...el.com>
cc:	netdev@...r.kernel.org, Andy Gospodarek <andy@...yhouse.net>,
	Patrick McHardy <kaber@...sh.net>,
	bonding-devel@...ts.sourceforge.net
Subject: Re: [PATCH] vlan: remove receive checks for bonding

Chris Leech <christopher.leech@...el.com> wrote:

>The checks in the hardware accelerated receive path are not up to date
>with what's in netif_receive_skb, which will get called anyway if the
>frame is not dropped in the vlan code.
>
>Signed-off-by: Chris Leech <christopher.leech@...el.com>

NAK.

	As I explained in a reply to Chris's separate message detailing
the problem he sees, the skb_bond_should_drop logic as implemented is
dependent upon knowing the original skb->dev the packet arrived on,
prior to VLAN reassigning it.

	That's not to say there's nothing wrong here, but removing the
calls with break other things.

	-J

>---
>
> net/8021q/vlan_core.c |    6 ------
> 1 files changed, 0 insertions(+), 6 deletions(-)
>
>diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
>index c584a0a..7576f9c 100644
>--- a/net/8021q/vlan_core.c
>+++ b/net/8021q/vlan_core.c
>@@ -11,9 +11,6 @@ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
> 	if (netpoll_rx(skb))
> 		return NET_RX_DROP;
>
>-	if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
>-		goto drop;
>-
> 	skb->skb_iif = skb->dev->ifindex;
> 	__vlan_hwaccel_put_tag(skb, vlan_tci);
> 	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
>@@ -83,9 +80,6 @@ vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
> {
> 	struct sk_buff *p;
>
>-	if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
>-		goto drop;
>-
> 	skb->skb_iif = skb->dev->ifindex;
> 	__vlan_hwaccel_put_tag(skb, vlan_tci);
> 	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
>

---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@...ibm.com
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html