hamradio/yam: fix info leak in ioctl
authorSalva Peiró <speiro@ai2.upv.es>
Tue, 17 Dec 2013 09:06:30 +0000 (10:06 +0100)
committerDavid S. Miller <davem@davemloft.net>
Thu, 19 Dec 2013 20:09:38 +0000 (15:09 -0500)
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>
drivers/net/hamradio/yam.c

index 1971411574db1c7ae2dd6549490ab6975e816cd1..61dd2447e1bb4eedb5d8e6b72abcf21e9f273afb 100644 (file)
@@ -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;