commit eb2da112485dc59834cf1a87036b3a7a43fba3c4
author Salva Peiró <speiro@ai2.upv.es> Tue Dec 17 10:06:30 2013 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Wed Jan 15 15:27:11 2014 -0800
tree 2589b78c059e13d037680de270f470ca402cf665
parent b7e3762c40e1d7f7a147f7d5be9584e1603bea01

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>

drivers/net/hamradio/yam.c

diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index 5a6412e..d8faeb6 100644
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -1058,6 +1058,7 @@
 		break;
 
 	case SIOCYAMGCFG:
+		memset(&yi, 0, sizeof(yi));
 		yi.cfg.mask = 0xffffffff;
 		yi.cfg.iobase = yp->iobase;
 		yi.cfg.irq = yp->irq;