[patch 34/48] can: Fix raw_getname() leak

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Eric Dumazet <eric.dumazet@xxxxxxxxx>

commit e84b90ae5eb3c112d1f208964df1d8156a538289 upstream.

raw_getname() can leak 10 bytes of kernel memory to user

(two bytes hole between can_family and can_ifindex,
8 bytes at the end of sockaddr_can structure)

Signed-off-by: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Acked-by: Oliver Hartkopp <oliver@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 net/can/raw.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -396,6 +396,7 @@ static int raw_getname(struct socket *so
 	if (peer)
 		return -EOPNOTSUPP;
 
+	memset(addr, 0, sizeof(*addr));
 	addr->can_family  = AF_CAN;
 	addr->can_ifindex = ro->ifindex;
 


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