nfs4: fix discover_server_trunking use after free
If clp is new (cl_count = 1) and it matches another client in nfs4_discover_server_trunking, the nfs_put_client will free clp before ->cl_preserve_clid is set. Cc: stable@vger.kernel.org # 3.7+ Signed-off-by: NWeston Andros Adamson <dros@primarydata.com> Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
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