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wanxl: fix info leak in ioctl

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[ Upstream commit 2b13d06c95 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Salva Peiró 2013-10-16 12:46:50 +02:00 committed by Greg Kroah-Hartman
parent f3ce845cfe
commit 79379b9694
1 changed files with 1 additions and 0 deletions
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drivers/net/wan/wanxl.c
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@ -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;