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authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2017-07-13 16:09:10 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-14 08:19:23 -0700
commit31a4562d7408493c6377933ff2f7d7302dbdea80 (patch)
tree66129e7691e6c3f56c9f30457107a98c6b734fd7 /net/packet
parent40fbbce007cb458da4c15cbf53beacf6b755cedc (diff)
net: bridge: fix dest lookup when vlan proto doesn't match
With 802.1ad support the vlan_ingress code started checking for vlan protocol mismatch which causes the current tag to be inserted and the bridge vlan protocol & pvid to be set. The vlan tag insertion changes the skb mac_header and thus the lookup mac dest pointer which was loaded prior to calling br_allowed_ingress in br_handle_frame_finish is VLAN_HLEN bytes off now, pointing to the last two bytes of the destination mac and the first four of the source mac causing lookups to always fail and broadcasting all such packets to all ports. Same thing happens for locally originated packets when passing via br_dev_xmit. So load the dest pointer after the vlan checks and possible skb change. Fixes: 8580e2117c06 ("bridge: Prepare for 802.1ad vlan filtering support") Reported-by: Anitha Narasimha Murthy <anitha@cumulusnetworks.com> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Acked-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
0 files changed, 0 insertions, 0 deletions