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net: Fix potential wrong skb->protocol in skb_vlan_untag()
authorMiaohe Lin <linmiaohe@huawei.com>
Sat, 15 Aug 2020 08:44:31 +0000 (04:44 -0400)
committerDavid S. Miller <davem@davemloft.net>
Sun, 16 Aug 2020 22:33:49 +0000 (15:33 -0700)
commit55eff0eb7460c3d50716ed9eccf22257b046ca92
treec75b285de0dca2367dbe68eee0252ea49ed24eb7tree | snapshot
parentf8414a8d886b613b90d9fdf7cda6feea313b1069commit | diff
net: Fix potential wrong skb->protocol in skb_vlan_untag()

We may access the two bytes after vlan_hdr in vlan_set_encap_proto(). So
we should pull VLAN_HLEN + sizeof(unsigned short) in skb_vlan_untag() or
we may access the wrong data.

Fixes: 0d5501c1c828 ("net: Always untag vlan-tagged traffic on input.")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/skbuff.c diff | blob | blame | history
A mirror of Linus' kernel repository