net: fix infoleak in rtnetlink
The stack object “map” has a total size of 32 bytes. Its last 4 bytes are padding generated by compiler. These padding bytes are not initialized and sent out via “nla_put”. Signed-off-by: Kangjie Lu <kjlu@gatech.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
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