Bugzilla: 1053647

Upstream-status: 3.13 and 3.12.8

From foo@baz Mon Jan 13 09:44:41 PST 2014

From: =?UTF-8?q?Salva=20Peir=C3=B3?= <speiro@ai2.upv.es>

Date: Tue, 17 Dec 2013 10:06:30 +0100

Subject: hamradio/yam: fix info leak in ioctl

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From: Salva Peiró <speiro@ai2.upv.es>

[ Upstream commit 8e3fbf870481eb53b2d3a322d1fc395ad8b367ed ]

The yam_ioctl() code fails to initialise the cmd field

of the struct yamdrv_ioctl_cfg. Add an explicit memset(0)

before filling the structure to avoid the 4-byte 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>

---

 drivers/net/hamradio/yam.c |    1 +

 1 file changed, 1 insertion(+)

--- a/drivers/net/hamradio/yam.c

+++ b/drivers/net/hamradio/yam.c

@@ -1057,6 +1057,7 @@ static int yam_ioctl(struct net_device *

 		break;

 	case SIOCYAMGCFG:

+		memset(&yi, 0, sizeof(yi));

 		yi.cfg.mask = 0xffffffff;

 		yi.cfg.iobase = yp->iobase;

 		yi.cfg.irq = yp->irq;