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    Subject[PATCH 5.2 14/56] ipip: validate header length in ipip_tunnel_xmit
    Date
    From: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>

    [ Upstream commit 47d858d0bdcd47cc1c6c9eeca91b091dd9e55637 ]

    We need the same checks introduced by commit cb9f1b783850
    ("ip: validate header length on virtual device xmit") for
    ipip tunnel.

    Fixes: cb9f1b783850b ("ip: validate header length on virtual device xmit")
    Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/ipv4/ipip.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/ipv4/ipip.c
    +++ b/net/ipv4/ipip.c
    @@ -275,6 +275,9 @@ static netdev_tx_t ipip_tunnel_xmit(stru
    const struct iphdr *tiph = &tunnel->parms.iph;
    u8 ipproto;

    + if (!pskb_inet_may_pull(skb))
    + goto tx_error;
    +
    switch (skb->protocol) {
    case htons(ETH_P_IP):
    ipproto = IPPROTO_IPIP;

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