[PATCH] hamradio/yam: fix info leak in ioctl

[Salva PeirÃ]

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 Peirà <speiro@xxxxxxxxxx>
CC: <stable@xxxxxxxxxxxxxxx>
---
 drivers/net/hamradio/yam.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index 1971411..bb02c8a 100644
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -953,6 +953,7 @@ static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	struct yamdrv_ioctl_mcs *ym;
 	int ioctl_cmd;
 
+	memset(&yi, 0, sizeof(yi));
 	if (copy_from_user(&ioctl_cmd, ifr->ifr_data, sizeof(int)))
 		 return -EFAULT;
 
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/