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| author | Lorenzo Bianconi <lorenzo.bianconi@redhat.com> | 2019-04-06 18:16:52 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-09 02:16:47 +0300 |
| commit | 492b67e28ee5f2a2522fb72e3d3bcb990e461514 (patch) | |
| tree | 02486e4add5ae9176d978eeacc6463f5c52e9897 /net/ipv6/ip6_gre.c | |
| parent | b75bb8a5b755d0c7bf1ac071e4df2349a7644a1e (diff) | |
| download | linux-492b67e28ee5f2a2522fb72e3d3bcb990e461514.tar.xz | |
net: ip_gre: fix possible use-after-free in erspan_rcv
erspan tunnels run __iptunnel_pull_header on received skbs to remove
gre and erspan headers. This can determine a possible use-after-free
accessing pkt_md pointer in erspan_rcv since the packet will be 'uncloned'
running pskb_expand_head if it is a cloned gso skb (e.g if the packet has
been sent though a veth device). Fix it resetting pkt_md pointer after
__iptunnel_pull_header
Fixes: 1d7e2ed22f8d ("net: erspan: refactor existing erspan code")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_gre.c')
0 files changed, 0 insertions, 0 deletions