Commit 14a4b42b authored by Jan Engelhardt's avatar Jan Engelhardt Committed by David S. Miller

net: fix unaligned access in IFLA_STATS64

Tony Luck observes that the original IFLA_STATS64 submission causes
unaligned accesses. This is because nla_data() returns a pointer to a
memory region that is only aligned to 32 bits. Do some memcpying to
workaround this.
Signed-off-by: default avatarJan Engelhardt <jengelh@medozas.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8544b9f7
...@@ -602,36 +602,38 @@ static void copy_rtnl_link_stats(struct rtnl_link_stats *a, ...@@ -602,36 +602,38 @@ static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
a->tx_compressed = b->tx_compressed; a->tx_compressed = b->tx_compressed;
} }
static void copy_rtnl_link_stats64(struct rtnl_link_stats64 *a, static void copy_rtnl_link_stats64(void *v, const struct net_device_stats *b)
const struct net_device_stats *b)
{ {
a->rx_packets = b->rx_packets; struct rtnl_link_stats64 a;
a->tx_packets = b->tx_packets;
a->rx_bytes = b->rx_bytes; a.rx_packets = b->rx_packets;
a->tx_bytes = b->tx_bytes; a.tx_packets = b->tx_packets;
a->rx_errors = b->rx_errors; a.rx_bytes = b->rx_bytes;
a->tx_errors = b->tx_errors; a.tx_bytes = b->tx_bytes;
a->rx_dropped = b->rx_dropped; a.rx_errors = b->rx_errors;
a->tx_dropped = b->tx_dropped; a.tx_errors = b->tx_errors;
a.rx_dropped = b->rx_dropped;
a->multicast = b->multicast; a.tx_dropped = b->tx_dropped;
a->collisions = b->collisions;
a.multicast = b->multicast;
a->rx_length_errors = b->rx_length_errors; a.collisions = b->collisions;
a->rx_over_errors = b->rx_over_errors;
a->rx_crc_errors = b->rx_crc_errors; a.rx_length_errors = b->rx_length_errors;
a->rx_frame_errors = b->rx_frame_errors; a.rx_over_errors = b->rx_over_errors;
a->rx_fifo_errors = b->rx_fifo_errors; a.rx_crc_errors = b->rx_crc_errors;
a->rx_missed_errors = b->rx_missed_errors; a.rx_frame_errors = b->rx_frame_errors;
a.rx_fifo_errors = b->rx_fifo_errors;
a->tx_aborted_errors = b->tx_aborted_errors; a.rx_missed_errors = b->rx_missed_errors;
a->tx_carrier_errors = b->tx_carrier_errors;
a->tx_fifo_errors = b->tx_fifo_errors; a.tx_aborted_errors = b->tx_aborted_errors;
a->tx_heartbeat_errors = b->tx_heartbeat_errors; a.tx_carrier_errors = b->tx_carrier_errors;
a->tx_window_errors = b->tx_window_errors; a.tx_fifo_errors = b->tx_fifo_errors;
a.tx_heartbeat_errors = b->tx_heartbeat_errors;
a->rx_compressed = b->rx_compressed; a.tx_window_errors = b->tx_window_errors;
a->tx_compressed = b->tx_compressed;
a.rx_compressed = b->rx_compressed;
a.tx_compressed = b->tx_compressed;
memcpy(v, &a, sizeof(a));
} }
static inline int rtnl_vfinfo_size(const struct net_device *dev) static inline int rtnl_vfinfo_size(const struct net_device *dev)
...@@ -734,8 +736,6 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, ...@@ -734,8 +736,6 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
sizeof(struct rtnl_link_stats64)); sizeof(struct rtnl_link_stats64));
if (attr == NULL) if (attr == NULL)
goto nla_put_failure; goto nla_put_failure;
stats = dev_get_stats(dev);
copy_rtnl_link_stats64(nla_data(attr), stats); copy_rtnl_link_stats64(nla_data(attr), stats);
if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) { if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
......
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