rpc-lib: Fixing the coverity issues

Coverity CIDs:
1210973
1124887
1124888
1124682
1124849
1124503

Change-Id: I012f6cf9d14753f572ab94aae6d442d1ef8df79a
BUG: 789278
Signed-off-by: Nandaja Varma <nandaja.varma@gmail.com>
Reviewed-on: http://review.gluster.org/9600
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

4 files changed, 14 insertions, 20 deletions

diff --git a/rpc/rpc-lib/src/rpc-clnt-ping.c b/rpc/rpc-lib/src/rpc-clnt-ping.c
index 0b32990e31e..17f8874a6a4 100644
--- a/rpc/rpc-lib/src/rpc-clnt-ping.c
+++ b/rpc/rpc-lib/src/rpc-clnt-ping.c
@@ -237,7 +237,7 @@ rpc_clnt_ping (struct rpc_clnt *rpc)
         conn = &rpc->conn;
         frame = create_frame (THIS, THIS->ctx->pool);
         if (!frame)
-                goto fail;
+                return ret;
 
         frame->local = rpc;
 
@@ -258,13 +258,6 @@ rpc_clnt_ping (struct rpc_clnt *rpc)
 
         return ret;
 
-fail:
-        if (frame) {
-                STACK_DESTROY (frame->root);
-        }
-
-        return ret;
-
 }
 
 static void
diff --git a/rpc/rpc-lib/src/rpc-clnt.c b/rpc/rpc-lib/src/rpc-clnt.c
index 20981ef9c9c..264a3120a46 100644
--- a/rpc/rpc-lib/src/rpc-clnt.c
+++ b/rpc/rpc-lib/src/rpc-clnt.c
@@ -724,7 +724,7 @@ rpc_clnt_handle_cbk (struct rpc_clnt *clnt, rpc_transport_pollin_t *msg)
         }
 
 out:
-        clnt = rpc_clnt_unref (clnt);
+        rpc_clnt_unref (clnt);
         return ret;
 }
 
@@ -774,7 +774,7 @@ out:
                 mem_put (saved_frame);
         }
 
-        clnt = rpc_clnt_unref (clnt);
+        rpc_clnt_unref (clnt);
         return ret;
 }
 
@@ -1455,11 +1455,12 @@ rpcclnt_cbk_program_register (struct rpc_clnt *clnt,
                 program->progver);
 
 out:
-        if (ret == -1) {
-                gf_log (clnt->conn.name, GF_LOG_ERROR,
-                        "Program registration failed:"
-                        " %s, Num: %d, Ver: %d", program->progname,
-                        program->prognum, program->progver);
+        if (ret == -1 && clnt) {
+                        gf_log (clnt->conn.name, GF_LOG_ERROR,
+                                        "Program registration failed:"
+                                        " %s, Num: %d, Ver: %d",
+                                        program->progname,
+                                        program->prognum, program->progver);
         }
 
         return ret;
diff --git a/rpc/rpc-lib/src/rpc-drc.c b/rpc/rpc-lib/src/rpc-drc.c
index 6adadd85b0e..036b215e0c0 100644
--- a/rpc/rpc-lib/src/rpc-drc.c
+++ b/rpc/rpc-lib/src/rpc-drc.c
@@ -462,14 +462,14 @@ rpcsvc_add_op_to_cache (rpcsvc_drc_globals_t *drc, drc_cached_op_t *reply)
                 rpcsvc_vacate_drc_entries (drc);
 
         tmp_reply = (drc_cached_op_t **)rb_probe (client->rbtree, reply);
-        if (*tmp_reply != reply) {
+        if (!tmp_reply) {
+                /* mem alloc failed */
+                return -1;
+        } else if (*tmp_reply != reply) {
                 /* should never happen */
                 gf_log (GF_RPCSVC, GF_LOG_ERROR,
                         "DRC failed to detect duplicates");
                 return -1;
-        } else if (*tmp_reply == NULL) {
-                /* mem alloc failed */
-                return -1;
         }
 
         client->op_count++;
diff --git a/rpc/rpc-lib/src/rpcsvc-auth.c b/rpc/rpc-lib/src/rpcsvc-auth.c
index 384e4a75db2..6b4c7937437 100644
--- a/rpc/rpc-lib/src/rpcsvc-auth.c
+++ b/rpc/rpc-lib/src/rpcsvc-auth.c
@@ -38,7 +38,7 @@ rpcsvc_auth_add_initer (struct list_head *list, char *idfier,
         }
 
         new->init = init;
-        strcpy (new->name, idfier);
+        strncpy (new->name, idfier, sizeof (new->name) - 1);
         INIT_LIST_HEAD (&new->authlist);
         list_add_tail (&new->authlist, list);
         return 0;