NFS: Fix potential race in nfs_fhget()

If we don't set the mode correctly in nfs_init_locked(), then there is
potential for a race with a second call to nfs_fhget that will cause
inode aliasing.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/inode.c

@@ -282,6 +282,7 @@ nfs_init_locked(struct inode *inode, void *opaque)
 	struct nfs_fattr	*fattr = desc->fattr;
 
 	set_nfs_fileid(inode, fattr->fileid);
+	inode->i_mode = fattr->mode;
 	nfs_copy_fh(NFS_FH(inode), desc->fh);
 	return 0;
 }