nfsd: reorder printk in do_probe_callback to avoid use-after-free

We're currently dereferencing the client after we drop our reference
count to it.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 0b3ffa9..4d4760e 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -419,9 +419,9 @@ static int do_probe_callback(void *data)
 out_release_client:
        rpc_shutdown_client(client);
 out_err:
-       put_nfs4_client(clp);
        dprintk("NFSD: warning: no callback path to client %.*s\n",
                (int)clp->cl_name.len, clp->cl_name.data);
+       put_nfs4_client(clp);
        return status;
 }