From: Nikolay Aleksandrov <niko...@cumulusnetworks.com>
Date: Mon, 24 Feb 2020 18:46:22 +0200
> In br_dev_xmit() we perform vlan filtering in br_allowed_ingress() but
> if the packet has the vlan header inside (e.g. bridge with disabled
> tx-vlan-offload) then the vlan filtering code will use skb_vlan_untag()
> to extract the vid before filtering which in turn calls pskb_may_pull()
> and we may end up with a stale eth pointer. Moreover the cached eth header
> pointer will generally be wrong after that operation. Remove the eth header
> caching and just use eth_hdr() directly, the compiler does the right thing
> and calculates it only once so we don't lose anything.
>
> Fixes: 057658cb33fb ("bridge: suppress arp pkts on BR_NEIGH_SUPPRESS ports")
> Signed-off-by: Nikolay Aleksandrov <niko...@cumulusnetworks.com>
> ---
> v2: remove syzbot's reported-by tag, this seems to be a different bug
Applied and queued up for -stable, thanks Nikolay.
