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wanxl: fix info leak in ioctl
The wanxl_ioctl() 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: Salva Peiró <speiro@ai2.upv.es>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Salva Peiró authored and davem330 committed Oct 18, 2013
1 parent b8bde1c commit 2b13d06
Showing 1 changed file with 1 addition and 0 deletions.
1 change: 1 addition & 0 deletions drivers/net/wan/wanxl.c
Expand Up @@ -355,6 +355,7 @@ static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
ifr->ifr_settings.size = size; /* data size wanted */
return -ENOBUFS;
}
memset(&line, 0, sizeof(line));
line.clock_type = get_status(port)->clocking;
line.clock_rate = 0;
line.loopback = 0;
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