From 80169a66a9d74ea1f129b9985a6128f1d01594f9 Mon Sep 17 00:00:00 2001 From: Inga Stotland Date: Fri, 6 Nov 2020 14:22:45 -0800 Subject: [PATCH] mesh/mesh-config-json: Fix errors found by static analysis This fixes miscellaneous issues related to unchecked return status and (temporary) allocated memory leaks due to daemon's exit on startup failure. Change-Id: Icf621e459ed4f045a740a78f3252dcdde8621350 Signed-off-by: anuj.bhumiya --- mesh/mesh-config-json.c | 62 ++++++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 29 deletions(-) diff --git a/mesh/mesh-config-json.c b/mesh/mesh-config-json.c index c58348d..f3ba1a0 100644 --- a/mesh/mesh-config-json.c +++ b/mesh/mesh-config-json.c @@ -476,6 +476,7 @@ static bool read_app_keys(json_object *jobj, struct mesh_config_node *node) struct mesh_config_appkey *appkey; appkey = l_new(struct mesh_config_appkey, 1); + l_queue_push_tail(node->appkeys, appkey); jtemp = json_object_array_get_idx(jarray, i); @@ -497,8 +498,6 @@ static bool read_app_keys(json_object *jobj, struct mesh_config_node *node) if (!str2hex(str, strlen(str), appkey->key, 16)) goto fail; - - l_queue_push_tail(node->appkeys, appkey); } return true; @@ -533,6 +532,8 @@ static bool read_net_keys(json_object *jobj, struct mesh_config_node *node) netkey = l_new(struct mesh_config_netkey, 1); + l_queue_push_tail(node->netkeys, netkey); + jtemp = json_object_array_get_idx(jarray, i); if (!get_key_index(jtemp, "index", &netkey->idx)) @@ -562,8 +563,6 @@ static bool read_net_keys(json_object *jobj, struct mesh_config_node *node) if (!str2hex(str, strlen(str), netkey->key, 16)) goto fail; - - l_queue_push_tail(node->netkeys, netkey); } return true; @@ -1037,7 +1036,7 @@ static bool parse_model_subscriptions(json_object *jsubs, jvalue = json_object_array_get_idx(jsubs, i); if (!jvalue) - return false; + goto fail; str = (char *)json_object_get_string(jvalue); len = strlen(str); @@ -1046,7 +1045,7 @@ static bool parse_model_subscriptions(json_object *jsubs, case 4: if (sscanf(str, "%04hx", &subs[i].addr.grp) != 1) goto fail; - break; + break; case 32: if (!str2hex(str, len, subs[i].addr.label, 16)) goto fail; @@ -1087,6 +1086,8 @@ static bool parse_models(json_object *jmodels, struct mesh_config_element *ele) mod = l_new(struct mesh_config_model, 1); + l_queue_push_tail(ele->models, mod); + if (!json_object_object_get_ex(jmodel, "modelId", &jvalue)) goto fail; @@ -1094,13 +1095,9 @@ static bool parse_models(json_object *jmodels, struct mesh_config_element *ele) len = strlen(str); - if (len != 4 && len != 8) - goto fail; - if (len == 4) { if (sscanf(str, "%04x", &id) != 1) goto fail; - } else if (len == 8) { if (sscanf(str, "%08x", &id) != 1) goto fail; @@ -1136,8 +1133,6 @@ static bool parse_models(json_object *jmodels, struct mesh_config_element *ele) if (!parse_model_subscriptions(jarray, mod)) goto fail; } - - l_queue_push_tail(ele->models, mod); } return true; @@ -1585,16 +1580,19 @@ static void add_model(void *a, void *b) { struct mesh_config_model *mod = a; json_object *jmodels = b, *jmodel, *jval; + bool result; jmodel = json_object_new_object(); if (!jmodel) return; - if (!mod->vendor) - write_uint16_hex(jmodel, "modelId", - (uint16_t) mod->id); - else - write_uint32_hex(jmodel, "modelId", mod->id); + result = (mod->vendor) ? write_uint32_hex(jmodel, "modelId", mod->id) : + write_uint16_hex(jmodel, "modelId", (uint16_t) mod->id); + + if (!result) { + json_object_put(jmodel); + return; + } jval = json_object_new_boolean(mod->sub_enabled); json_object_object_add(jmodel, "subEnabled", jval); @@ -1672,24 +1670,24 @@ static struct mesh_config *create_config(const char *cfg_path, jelement = json_object_new_object(); - if (!jelement) { - json_object_put(jelems); - return NULL; - } + if (!jelement) + goto fail; - write_int(jelement, "elementIndex", ele->index); - write_uint16_hex(jelement, "location", ele->location); json_object_array_add(jelems, jelement); + if (!write_int(jelement, "elementIndex", ele->index)) + goto fail; + + if (!write_uint16_hex(jelement, "location", ele->location)) + goto fail; + /* Models */ if (l_queue_isempty(ele->models)) continue; jmodels = json_object_new_array(); - if (!jmodels) { - json_object_put(jelems); - return NULL; - } + if (!jmodels) + goto fail; json_object_object_add(jelement, "models", jmodels); l_queue_foreach(ele->models, add_model, jmodels); @@ -1707,6 +1705,10 @@ static struct mesh_config *create_config(const char *cfg_path, gettimeofday(&cfg->write_time, NULL); return cfg; + +fail: + json_object_put(jelems); + return NULL; } struct mesh_config *mesh_config_create(const char *cfgdir_name, @@ -2405,8 +2407,10 @@ static void idle_save_config(struct l_idle *idle, void *user_data) if (result) { remove(fname_bak); - rename(fname_cfg, fname_bak); - rename(fname_tmp, fname_cfg); + + if (rename(fname_cfg, fname_bak) < 0 || + rename(fname_tmp, fname_cfg) < 0) + result = false; } remove(fname_tmp); -- 2.7.4