netdev - Re: [PATCH v3 net 1/2] net/sched: act_vlan: Push skb->data to mac_header prior calling skb_vlan

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Date:   Thu, 29 Sep 2016 12:20:35 +0300
From:   Shmulik Ladkani <shmulik.ladkani@...il.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Jamal Hadi Salim <jhs@...atatu.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Pravin Shelar <pshelar@....org>, Jiri Pirko <jiri@...lanox.com>
Subject: Re: [PATCH v3 net 1/2] net/sched: act_vlan: Push skb->data to
 mac_header prior calling skb_vlan_*() functions

David,

On Thu, 29 Sep 2016 12:10:40 +0300 Shmulik Ladkani <shmulik.ladkani@...il.com> wrote:
> This patch fixes act_vlan to point to the mac_header prior calling
> skb_vlan_*() functions, as other callers do.
> 

This 1/2 patch fixes the problem detailed in [1] for act_vlan,
last known caller of skb_vlan_*() with skb->data not at mac_header.

I think it's a good candidate for -stable; it fixes the observed bug and
it is rather focused.

Subsequent 2/2 patch hermetically seals the future possibility that one
might call skb_vlan_*() with skb->data not at mac_header.

This might go to stable as well, but not strictly required.

Thanks,
Shmulik

[1] https://patchwork.ozlabs.org/patch/676111/