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    Subject[PATCH 4.9 59/90] batman-adv: Always initialize fragment header priority
    Date
    From: Sven Eckelmann <sven.eckelmann@open-mesh.com>

    commit fe77d8257c4d838c5976557ddb87bd789f312412 upstream.

    The batman-adv unuicast fragment header contains 3 bits for the priority of
    the packet. These bits will be initialized when the skb->priority contains
    a value between 256 and 263. But otherwise, the uninitialized bits from the
    stack will be used.

    Fixes: c0f25c802b33 ("batman-adv: Include frame priority in fragment header")
    Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
    Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/batman-adv/fragmentation.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/net/batman-adv/fragmentation.c
    +++ b/net/batman-adv/fragmentation.c
    @@ -484,6 +484,8 @@ int batadv_frag_send_packet(struct sk_bu
    */
    if (skb->priority >= 256 && skb->priority <= 263)
    frag_header.priority = skb->priority - 256;
    + else
    + frag_header.priority = 0;

    ether_addr_copy(frag_header.orig, primary_if->net_dev->dev_addr);
    ether_addr_copy(frag_header.dest, orig_node->orig);

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