From: Cong Wang <[email protected]> There is a hole in struct hd_geometry, so we have to zero the struct on stack before copying it to user-space.
Cc: Jens Axboe <[email protected]> Signed-off-by: Cong Wang <[email protected]> --- diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 7c668c8..7e5d474 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -59,6 +59,7 @@ static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, if (!disk->fops->getgeo) return -ENOTTY; + memset(&geo, 0, sizeof(geo)); /* * We need to set the startsect first, the driver may * want to override it. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
