From 8e3fbf870481eb53b2d3a322d1fc395ad8b367ed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Salva=20Peir=C3=B3?= <speiro@ai2.upv.es>
Date: Tue, 17 Dec 2013 10:06:30 +0100
Subject: [PATCH] hamradio/yam: fix info leak in ioctl
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Git-commit: 8e3fbf870481eb53b2d3a322d1fc395ad8b367ed
Patch-mainline: 3.13-rc7
References: bnc#858872,CVE-2014-1446

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/hamradio/yam.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -1058,6 +1058,7 @@ 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;
