nfsd4: fix security flavor of NFSv4.0 callback

Commit d5497fc693a446ce9100fcf4117c3f795ddfd0d2 "nfsd4: move rq_flavor
into svc_cred" forgot to remove cl_flavor from the client, leaving two
places (cl_flavor and cl_cred.cr_flavor) for the flavor to be stored.
After that patch, the latter was the one that was updated, but the
former was the one that the callback used.

Symptoms were a long delay on utime().  This is because the utime()
generated a setattr which recalled a delegation, but the cb_recall was
ignored by the client because it had the wrong security flavor.

Cc: stable@vger.kernel.org
Tested-by: Jamie Heilman <jamie@audible.transient.net>
Reported-by: Jamie Heilman <jamie@audible.transient.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index cbaf4f8..4c7bd35 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -651,12 +651,12 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
 
        if (clp->cl_minorversion == 0) {
                if (!clp->cl_cred.cr_principal &&
-                               (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
+                               (clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5))
                        return -EINVAL;
                args.client_name = clp->cl_cred.cr_principal;
                args.prognumber = conn->cb_prog,
                args.protocol = XPRT_TRANSPORT_TCP;
-               args.authflavor = clp->cl_flavor;
+               args.authflavor = clp->cl_cred.cr_flavor;
                clp->cl_cb_ident = conn->cb_ident;
        } else {
                if (!conn->cb_xprt)

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index e617314..22bd0a6 100644 (file)
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -231,7 +231,6 @@ struct nfs4_client {
        nfs4_verifier           cl_verifier;    /* generated by client */
        time_t                  cl_time;        /* time of last lease renewal */
        struct sockaddr_storage cl_addr;        /* client ipaddress */
-       u32                     cl_flavor;      /* setclientid pseudoflavor */
        struct svc_cred         cl_cred;        /* setclientid principal */
        clientid_t              cl_clientid;    /* generated by server */
        nfs4_verifier           cl_confirm;     /* generated by server */