SUNRPC: Add a missing spin_unlock to gss_mech_list_pseudoflavors

The patch "SUNRPC: Add rpcauth_list_flavors()" introduces a new error
path in gss_mech_list_pseudoflavors, but fails to release the spin lock.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
index 6ac5dfcd2928..b174fcd9ff4c 100644
--- a/net/sunrpc/auth_gss/gss_mech_switch.c
+++ b/net/sunrpc/auth_gss/gss_mech_switch.c
@@ -257,8 +257,10 @@ int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
         spin_lock(&registered_mechs_lock);
         list_for_each_entry(pos, &registered_mechs, gm_list) {
                 for (j = 0; j < pos->gm_pf_num; j++) {
-                        if (i >= size)
+                        if (i >= size) {
+                                spin_unlock(&registered_mechs_lock);
                                 return -ENOMEM;
+                        }
                         array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
                 }
         }