[B.A.T.M.A.N.] [PATCH] batman-adv: Always initialize fragment header priority

[Sven Eckelmann]

From: Sven Eckelmann <sven.eckelm...@open-mesh.com>

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: 4f241fcea704 ("batman-adv: Include frame priority in fragment header")
Signed-off-by: Sven Eckelmann <sven.eckelm...@open-mesh.com>
---
Cc: Andrew Lunn <and...@lunn.ch>
---
 net/batman-adv/fragmentation.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index 
a98cf1104a30a30e66fb6018bef59dea83dc4b7a..ebe6e38934e46ed5de4d30204e791dbe40285fcc
 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -499,6 +499,8 @@ int batadv_frag_send_packet(struct sk_buff *skb,
         */
        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);