X25 remove bkl in call user data length ioctl

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

1 files changed, 6 insertions, 5 deletions

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 8cfc419cef4..ad96ee90fe2 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1562,19 +1562,20 @@ out_dtefac_release:
                 case SIOCX25SCUDMATCHLEN: {
                         struct x25_subaddr sub_addr;
                         rc = -EINVAL;
-                        lock_kernel();
+                        lock_sock(sk);
                         if(sk->sk_state != TCP_CLOSE)
-                                break;
+                                goto out_cud_release;
                         rc = -EFAULT;
                         if (copy_from_user(&sub_addr, argp,
                                         sizeof(sub_addr)))
-                                break;
+                                goto out_cud_release;
                         rc = -EINVAL;
                         if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
-                                break;
+                                goto out_cud_release;
                         x25->cudmatchlength = sub_addr.cudmatchlength;
-                        unlock_kernel();
                         rc = 0;
+out_cud_release:
+                        release_sock(sk);
                         break;
                 }