farsync: fix info leak in ioctl
[ 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1972,6 +1972,7 @@ fst_get_iface(struct fst_card_info *card, struct fst_port_info *port,
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}
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i = port->index;
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memset(&sync, 0, sizeof(sync));
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sync.clock_rate = FST_RDL(card, portConfig[i].lineSpeed);
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/* Lucky card and linux use same encoding here */
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sync.clock_type = FST_RDB(card, portConfig[i].internalClock) ==
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