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Rename json_set_object to json_steal_object to make it clear what the function does and nullify the original pointer preventing use after free.

master
Con Kolivas 8 years ago
parent
b6215001cf
commit
7a1e907fa7
4 changed files with 31 additions and 30 deletions
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  1. 8
      src/connector.c
  2. 12
      src/generator.c
  3. 9
      src/libckpool.h
  4. 32
      src/stratifier.c

8
src/connector.c
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@ -1378,7 +1378,7 @@ char *connector_stats(void *data, const int runtime)
ck_runlock(&cdata->lock);
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "clients", subval);
json_steal_object(val, "clients", subval);
ck_rlock(&cdata->lock);
DL_COUNT(cdata->dead_clients, client, objects);
@ -1387,7 +1387,7 @@ char *connector_stats(void *data, const int runtime)
memsize = objects * sizeof(client_instance_t);
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "dead", subval);
json_steal_object(val, "dead", subval);
objects = 0;
memsize = 0;
@ -1398,12 +1398,12 @@ char *connector_stats(void *data, const int runtime)
memsize += sizeof(sender_send_t) + send->len + 1;
}
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", cdata->sends_generated);
json_set_object(val, "sends", subval);
json_steal_object(val, "sends", subval);
JSON_CPACK(subval, "{si,si,si}", "count", cdata->sends_queued, "memory", cdata->sends_size, "generated", cdata->sends_delayed);
mutex_unlock(&cdata->sender_lock);
json_set_object(val, "delays", subval);
json_steal_object(val, "delays", subval);
buf = json_dumps(val, JSON_NO_UTF8 | JSON_PRESERVE_ORDER);
json_decref(val);

12
src/generator.c
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@ -2834,12 +2834,12 @@ static void send_stats(gdata_t *gdata, const int sockd)
memsize = SAFE_HASH_OVERHEAD(gdata->proxies) + sizeof(proxy_instance_t) * objects;
generated = gdata->proxies_generated;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "proxies", subval);
json_steal_object(val, "proxies", subval);
DL_COUNT(gdata->dead_proxies, proxy, objects);
memsize = sizeof(proxy_instance_t) * objects;
JSON_CPACK(subval, "{si,si}", "count", objects, "memory", memsize);
json_set_object(val, "dead_proxies", subval);
json_steal_object(val, "dead_proxies", subval);
total_objects = memsize = 0;
for (proxy = gdata->proxies; proxy; proxy=proxy->hh.next) {
@ -2852,7 +2852,7 @@ static void send_stats(gdata_t *gdata, const int sockd)
mutex_unlock(&gdata->lock);
JSON_CPACK(subval, "{si,si,si}", "count", total_objects, "memory", memsize, "generated", generated);
json_set_object(val, "subproxies", subval);
json_steal_object(val, "subproxies", subval);
mutex_lock(&gdata->notify_lock);
objects = HASH_COUNT(gdata->notify_instances);
@ -2861,7 +2861,7 @@ static void send_stats(gdata_t *gdata, const int sockd)
mutex_unlock(&gdata->notify_lock);
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "notifies", subval);
json_steal_object(val, "notifies", subval);
mutex_lock(&gdata->share_lock);
objects = HASH_COUNT(gdata->shares);
@ -2870,7 +2870,7 @@ static void send_stats(gdata_t *gdata, const int sockd)
mutex_unlock(&gdata->share_lock);
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "shares", subval);
json_steal_object(val, "shares", subval);
mutex_lock(&gdata->psend_lock);
DL_COUNT(gdata->psends, msg, objects);
@ -2879,7 +2879,7 @@ static void send_stats(gdata_t *gdata, const int sockd)
memsize = sizeof(stratum_msg_t) * objects;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "psends", subval);
json_steal_object(val, "psends", subval);
send_api_response(val, sockd);
}

9
src/libckpool.h
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@ -409,14 +409,15 @@ static inline void _json_set_bool(json_t *val, const char *key, bool boolean,
}
#define json_set_bool(val, key, boolean) _json_set_bool(val, key, boolean, __FILE__, __func__, __LINE__)
static inline void _json_set_object(json_t *val, const char *key, json_t *object,
/* Steals an object and NULLs original reference */
static inline void _json_steal_object(json_t *val, const char *key, json_t **object,
const char *file, const char *func, const int line)
{
if (unlikely(json_object_set_new_nocheck(val, key, object)))
if (unlikely(json_object_set_new_nocheck(val, key, *object)))
LOGERR("Failed to set json object from %s %s:%d", file, func, line);
*object = NULL;
}
#define json_set_object(val, key, object) _json_set_object(val, key, object, __FILE__, __func__, __LINE__)
#define json_steal_object(val, key, object) _json_steal_object(val, key, &(object), __FILE__, __func__, __LINE__)
void rename_proc(const char *name);
void create_pthread(pthread_t *thread, void *(*start_routine)(void *), void *arg);

32
src/stratifier.c
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@ -3827,32 +3827,32 @@ char *stratifier_stats(ckpool_t *ckp, void *data)
memsize = SAFE_HASH_OVERHEAD(sdata->workbases) + sizeof(workbase_t) * objects;
generated = sdata->workbases_generated;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "workbases", subval);
json_steal_object(val, "workbases", subval);
objects = HASH_COUNT(sdata->remote_workbases);
memsize = SAFE_HASH_OVERHEAD(sdata->remote_workbases) + sizeof(workbase_t) * objects;
ck_runlock(&sdata->workbase_lock);
JSON_CPACK(subval, "{si,si}", "count", objects, "memory", memsize);
json_set_object(val, "remote_workbases", subval);
json_steal_object(val, "remote_workbases", subval);
ck_rlock(&sdata->instance_lock);
objects = HASH_COUNT(sdata->user_instances);
memsize = SAFE_HASH_OVERHEAD(sdata->user_instances) + sizeof(stratum_instance_t) * objects;
JSON_CPACK(subval, "{si,si}", "count", objects, "memory", memsize);
json_set_object(val, "users", subval);
json_steal_object(val, "users", subval);
objects = HASH_COUNT(sdata->stratum_instances);
memsize = SAFE_HASH_OVERHEAD(sdata->stratum_instances);
generated = sdata->stratum_generated;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "clients", subval);
json_steal_object(val, "clients", subval);
objects = sdata->stats.disconnected;
generated = sdata->disconnected_generated;
memsize = SAFE_HASH_OVERHEAD(sdata->disconnected_sessions);
memsize += sizeof(session_t) * sdata->stats.disconnected;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "disconnected", subval);
json_steal_object(val, "disconnected", subval);
ck_runlock(&sdata->instance_lock);
mutex_lock(&sdata->share_lock);
@ -3862,27 +3862,27 @@ char *stratifier_stats(ckpool_t *ckp, void *data)
mutex_unlock(&sdata->share_lock);
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "shares", subval);
json_steal_object(val, "shares", subval);
ck_rlock(&sdata->txn_lock);
objects = HASH_COUNT(sdata->txns);
memsize = SAFE_HASH_OVERHEAD(sdata->txns) + sizeof(txntable_t) * objects;
generated = sdata->txns_generated;
JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
json_set_object(val, "transactions", subval);
json_steal_object(val, "transactions", subval);
ck_runlock(&sdata->txn_lock);
ckmsgq_stats(sdata->ssends, sizeof(smsg_t), &subval);
json_set_object(val, "ssends", subval);
json_steal_object(val, "ssends", subval);
/* Don't know exactly how big the string is so just count the pointer for now */
ckmsgq_stats(sdata->srecvs, sizeof(char *), &subval);
json_set_object(val, "srecvs", subval);
json_steal_object(val, "srecvs", subval);
if (!CKP_STANDALONE(ckp)) {
ckmsgq_stats(sdata->ckdbq, sizeof(char *), &subval);
json_set_object(val, "ckdbq", subval);
json_steal_object(val, "ckdbq", subval);
}
ckmsgq_stats(sdata->stxnq, sizeof(json_params_t), &subval);
json_set_object(val, "stxnq", subval);
json_steal_object(val, "stxnq", subval);
buf = json_dumps(val, JSON_NO_UTF8 | JSON_PRESERVE_ORDER);
json_decref(val);
@ -7539,12 +7539,12 @@ static void ssend_process(ckpool_t *ckp, smsg_t *msg)
free(msg);
}
/* json_decref on NULL is safe */
static void discard_json_params(json_params_t *jp)
{
json_decref(jp->method);
json_decref(jp->params);
if (jp->id_val)
json_decref(jp->id_val);
json_decref(jp->id_val);
free(jp);
}
@ -7618,9 +7618,9 @@ static void upstream_auth(ckpool_t *ckp, stratum_instance_t *client, json_params
ts_realtime(&now);
sprintf(cdfield, "%lu,%lu", now.tv_sec, now.tv_nsec);
json_set_object(val, "params", jp->params);
json_set_object(val, "id", jp->id_val);
json_set_object(val, "method", jp->method);
json_steal_object(val, "params", jp->params);
json_steal_object(val, "id", jp->id_val);
json_steal_object(val, "method", jp->method);
json_set_string(val, "method", stratum_msgs[SM_AUTH]);
json_set_string(val, "useragent", client->useragent ? : "");

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