Fix possible leak of mnt/dentry references.

In error cases, we might not drop references to mnt/dentry.

Thanks to Al Viro





 ----------- Diffstat output ------------
 ./fs/nfsd/export.c |   12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

--- ./fs/nfsd/export.c	2002/03/18 01:34:47	1.2
+++ ./fs/nfsd/export.c	2002/03/18 01:35:27	1.3
@@ -221,8 +221,8 @@
 	strcpy(exp->ex_path, nxp->ex_path);
 	exp->ex_client = clp;
 	exp->ex_parent = parent;
-	exp->ex_dentry = nd.dentry;
-	exp->ex_mnt = nd.mnt;
+	exp->ex_dentry = dget(nd.dentry);
+	exp->ex_mnt = mntget(nd.mnt);
 	exp->ex_flags = nxp->ex_flags;
 	exp->ex_dev = dev;
 	exp->ex_ino = ino;
@@ -248,16 +248,12 @@
 
 	err = 0;
 
-	/* Unlock hashtable */
+finish:
+	path_release(&nd);
 out_unlock:
 	exp_unlock();
 out:
 	return err;
-
-	/* Release the dentry */
-finish:
-	path_release(&nd);
-	goto out_unlock;
 }
 
 /*