bridge: netlink: make br_fill_info's frame size smaller

When KASAN is enabled the frame size grows > 2048 bytes and we get a
warning, so make it smaller.
net/bridge/br_netlink.c: In function 'br_fill_info':
>> net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes
>> is larger than 2048 bytes [-Wframe-larger-than=]

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 70efe2e..330abf4 100644 (file)
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -1057,28 +1057,27 @@ static size_t br_get_size(const struct net_device *brdev)
 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
 {
        struct net_bridge *br = netdev_priv(brdev);
-       u64 hello_timer, tcn_timer, topology_change_timer, gc_timer, clockval;
        u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
        u32 hello_time = jiffies_to_clock_t(br->hello_time);
        u32 age_time = jiffies_to_clock_t(br->max_age);
        u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
        u32 stp_enabled = br->stp_enabled;
        u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
-       u16 group_fwd_mask = br->group_fwd_mask;
        u8 vlan_enabled = br_vlan_enabled(br);
-       struct ifla_bridge_id root_id, bridge_id;
-
-       memset(&bridge_id, 0, sizeof(bridge_id));
-       memset(&root_id, 0, sizeof(root_id));
-       memcpy(root_id.prio, br->designated_root.prio, sizeof(root_id.prio));
-       memcpy(root_id.addr, br->designated_root.addr, sizeof(root_id.addr));
-       memcpy(bridge_id.prio, br->bridge_id.prio, sizeof(bridge_id.prio));
-       memcpy(bridge_id.addr, br->bridge_id.addr, sizeof(bridge_id.addr));
-       hello_timer = br_timer_value(&br->hello_timer);
-       tcn_timer = br_timer_value(&br->tcn_timer);
-       topology_change_timer = br_timer_value(&br->topology_change_timer);
-       gc_timer = br_timer_value(&br->gc_timer);
-       clockval = 0;
+       u64 clockval;
+
+       clockval = br_timer_value(&br->hello_timer);
+       if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
+               return -EMSGSIZE;
+       clockval = br_timer_value(&br->tcn_timer);
+       if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
+               return -EMSGSIZE;
+       clockval = br_timer_value(&br->topology_change_timer);
+       if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
+               return -EMSGSIZE;
+       clockval = br_timer_value(&br->gc_timer);
+       if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
+               return -EMSGSIZE;
 
        if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
            nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
@@ -1087,19 +1086,16 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
            nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
            nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
            nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
-           nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, group_fwd_mask) ||
-           nla_put(skb, IFLA_BR_ROOT_ID, sizeof(root_id), &root_id) ||
-           nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(bridge_id), &bridge_id) ||
+           nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
+           nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
+                   &br->bridge_id) ||
+           nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
+                   &br->designated_root) ||
            nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
            nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
            nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
            nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
                       br->topology_change_detected) ||
-           nla_put_u64(skb, IFLA_BR_HELLO_TIMER, hello_timer) ||
-           nla_put_u64(skb, IFLA_BR_TCN_TIMER, tcn_timer) ||
-           nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER,
-                       topology_change_timer) ||
-           nla_put_u64(skb, IFLA_BR_GC_TIMER, gc_timer) ||
            nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
                return -EMSGSIZE;