Commit 812ad3d2 authored by Kees Cook's avatar Kees Cook Committed by David S. Miller

ethtool: stats: Use struct_group() to clear all stats at once

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memset(), avoid intentionally writing across
neighboring fields.

Add struct_group() to mark region of struct stats_reply_data that should
be initialized, which can now be done in a single memset() call.
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b5d8cf0a
......@@ -14,10 +14,12 @@ struct stats_req_info {
struct stats_reply_data {
struct ethnl_reply_data base;
struct_group(stats,
struct ethtool_eth_phy_stats phy_stats;
struct ethtool_eth_mac_stats mac_stats;
struct ethtool_eth_ctrl_stats ctrl_stats;
struct ethtool_rmon_stats rmon_stats;
);
const struct ethtool_rmon_hist_range *rmon_ranges;
};
......@@ -117,10 +119,7 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base,
/* Mark all stats as unset (see ETHTOOL_STAT_NOT_SET) to prevent them
* from being reported to user space in case driver did not set them.
*/
memset(&data->phy_stats, 0xff, sizeof(data->phy_stats));
memset(&data->mac_stats, 0xff, sizeof(data->mac_stats));
memset(&data->ctrl_stats, 0xff, sizeof(data->ctrl_stats));
memset(&data->rmon_stats, 0xff, sizeof(data->rmon_stats));
memset(&data->stats, 0xff, sizeof(data->stats));
if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
dev->ethtool_ops->get_eth_phy_stats)
......
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