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net: fix infoleak in rtnetlink

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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”.

Change-Id: I4d8432bef1c67c4f9061f79bd6246852c801269d
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2016-05-03 16:46:24 -04:00 committed by Olivier Karasangabo
parent ae306adc03
commit ee90b7644a
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1 changed files with 1 additions and 8 deletions
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9
net/core/rtnetlink.c
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@ -899,14 +899,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
goto nla_put_failure;
if (1) {
struct rtnl_link_ifmap map = {
.mem_start = dev->mem_start,
.mem_end = dev->mem_end,
.base_addr = dev->base_addr,
.irq = dev->irq,
.dma = dev->dma,
.port = dev->if_port,
};
struct rtnl_link_ifmap map;
memset(&map, 0, sizeof(map));
map.mem_start = dev->mem_start;
map.mem_end = dev->mem_end;