nfsd4: fix unlikely race in session replay case

[safe/jmp/linux-2.6] / fs / nfsd / nfs4state.c

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index bba9fff..737315c 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1443,11 +1443,10 @@ nfsd4_sequence(struct svc_rqst *rqstp,
        cstate->slot = slot;
        cstate->session = session;
 
-       /* Hold a session reference until done processing the compound:
-        * nfsd4_put_session called only if the cstate slot is set.
-        */
-       nfsd4_get_session(session);
 out:
+       /* Hold a session reference until done processing the compound. */
+       if (cstate->session)
+               nfsd4_get_session(cstate->session);
        spin_unlock(&sessionid_lock);
        /* Renew the clientid on success and on replay */
        if (cstate->session) {