From: Salva Peiró <speiro@ai2.upv.es>
Date: Tue, 17 Dec 2013 09:06:30 +0000 (+0100)
Subject: hamradio/yam: fix info leak in ioctl
X-Git-Tag: v3.12.8~53
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e7834c71c2cacc621ddc64bd71f83ef2054f6539;p=kernel%2Fkernel-generic.git

hamradio/yam: fix info leak in ioctl

[ 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>
---

diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index 5af1c3e..b7e9675 100644
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -1057,6 +1057,7 @@ static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		break;
 
 	case SIOCYAMGCFG:
+		memset(&yi, 0, sizeof(yi));
 		yi.cfg.mask = 0xffffffff;
 		yi.cfg.iobase = yp->iobase;
 		yi.cfg.irq = yp->irq;