If finding backchannel failed, nfsd should not enter setup_callback_client.
Signed-off-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
---
fs/nfsd/nfs4callback.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7f05cd1..755d6d6 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -664,7 +664,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
args.authflavor = clp->cl_cred.cr_flavor;
clp->cl_cb_ident = conn->cb_ident;
} else {
- if (!conn->cb_xprt)
+ if (!conn->cb_xprt || !ses)
return -EINVAL;
clp->cl_cb_conn.cb_xprt = conn->cb_xprt;
clp->cl_cb_session = ses;
@@ -982,7 +982,7 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
}
spin_unlock(&clp->cl_lock);
- err = setup_callback_client(clp, &conn, ses);
+ err = c ? setup_callback_client(clp, &conn, ses) : -ENOENT;
if (err) {
nfsd4_mark_cb_down(clp, err);
return;
--
1.8.4.2
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