X25 remove bkl in subscription ioctls

Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 8 deletions

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 2351aceb296d..45be72c3f940 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1415,17 +1415,13 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         rc = x25_route_ioctl(cmd, argp);
                         break;
                 case SIOCX25GSUBSCRIP:
-                        lock_kernel();
                         rc = x25_subscr_ioctl(cmd, argp);
-                        unlock_kernel();
                         break;
                 case SIOCX25SSUBSCRIP:
                         rc = -EPERM;
                         if (!capable(CAP_NET_ADMIN))
                                 break;
-                        lock_kernel();
                         rc = x25_subscr_ioctl(cmd, argp);
-                        unlock_kernel();
                         break;
                 case SIOCX25GFACILITIES: {
                         struct x25_facilities fac = x25->facilities;
@@ -1646,16 +1642,20 @@ static int compat_x25_subscr_ioctl(unsigned int cmd,
         dev_put(dev);
 
         if (cmd == SIOCX25GSUBSCRIP) {
+                read_lock_bh(&x25_neigh_list_lock);
                 x25_subscr.extended = nb->extended;
                 x25_subscr.global_facil_mask = nb->global_facil_mask;
+                read_unlock_bh(&x25_neigh_list_lock);
                 rc = copy_to_user(x25_subscr32, &x25_subscr,
                                 sizeof(*x25_subscr32)) ? -EFAULT : 0;
         } else {
                 rc = -EINVAL;
                 if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
                         rc = 0;
+                        write_lock_bh(&x25_neigh_list_lock);
                         nb->extended = x25_subscr.extended;
                         nb->global_facil_mask = x25_subscr.global_facil_mask;
+                        write_unlock_bh(&x25_neigh_list_lock);
                 }
         }
         x25_neigh_put(nb);
@@ -1711,17 +1711,13 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
                 rc = x25_route_ioctl(cmd, argp);
                 break;
         case SIOCX25GSUBSCRIP:
-                lock_kernel();
                 rc = compat_x25_subscr_ioctl(cmd, argp);
-                unlock_kernel();
                 break;
         case SIOCX25SSUBSCRIP:
                 rc = -EPERM;
                 if (!capable(CAP_NET_ADMIN))
                         break;
-                lock_kernel();
                 rc = compat_x25_subscr_ioctl(cmd, argp);
-                unlock_kernel();
                 break;
         case SIOCX25GFACILITIES:
         case SIOCX25SFACILITIES: