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Subject[PATCH 3.2 11/87] farsync: fix info leak in ioctl
3.2.53-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Salva Peiró <speiro@ai2.upv.es>

[ Upstream commit 96b340406724d87e4621284ebac5e059d67b2194 ]

The fst_get_iface() code fails to initialize the two padding bytes of
struct sync_serial_settings after the ->loopback member. Add an explicit
memset(0) before filling the structure to avoid the info leak.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/wan/farsync.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c
index ebb9f24..7a4c491 100644
--- a/drivers/net/wan/farsync.c
+++ b/drivers/net/wan/farsync.c
@@ -1972,6 +1972,7 @@ fst_get_iface(struct fst_card_info *card, struct fst_port_info *port,
}

i = port->index;
+ memset(&sync, 0, sizeof(sync));
sync.clock_rate = FST_RDL(card, portConfig[i].lineSpeed);
/* Lucky card and linux use same encoding here */
sync.clock_type = FST_RDB(card, portConfig[i].internalClock) ==
--
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