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@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 stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html