ipv4: use the right lock for ping_group_range

This reverts commit a681574c99be23e4d20b769bf0e543239c364af5
("ipv4: disable BH in set_ping_group_range()") because we never
read ping_group_range in BH context (unlike local_port_range).

Then, since we already have a lock for ping_group_range, those
using ip_local_ports.lock for ping_group_range are clearly typos.

We might consider to share a same lock for both ping_group_range
and local_port_range w.r.t. space saving, but that should be for
net-next.

Fixes: a681574c99be ("ipv4: disable BH in set_ping_group_range()")
Fixes: ba6b918ab234 ("ping: move ping_group_range out of CONFIG_SYSCTL")
Cc: Eric Dumazet <edumazet@google.com>
Cc: Eric Salo <salo@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 500ae40..80bc36b 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -96,11 +96,11 @@ static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low
                container_of(table->data, struct net, ipv4.ping_group_range.range);
        unsigned int seq;
        do {
-               seq = read_seqbegin(&net->ipv4.ip_local_ports.lock);
+               seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
 
                *low = data[0];
                *high = data[1];
-       } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq));
+       } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
 }
 
 /* Update system visible IP port range */
@@ -109,10 +109,10 @@ static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t hig
        kgid_t *data = table->data;
        struct net *net =
                container_of(table->data, struct net, ipv4.ping_group_range.range);
-       write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
+       write_seqlock(&net->ipv4.ping_group_range.lock);
        data[0] = low;
        data[1] = high;
-       write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
+       write_sequnlock(&net->ipv4.ping_group_range.lock);
 }
 
 /* Validate changes from /proc interface. */