utils: fix leaks for map unpacking

src/ctr_decode_msgpack.c

@@ -124,6 +124,11 @@ static int unpack_instrumentation_scope_attributes(mpack_reader_t *reader, size_
             return CTR_DECODE_MSGPACK_VARIANT_DECODE_ERROR;
         }
 
+        if (context->scope_span->instrumentation_scope->attr != NULL) {
+            ctr_attributes_destroy(context->scope_span->instrumentation_scope->attr);
+            context->scope_span->instrumentation_scope->attr = NULL;
+        }
+
         context->scope_span->instrumentation_scope->attr = attributes;
     }
 
@@ -132,6 +137,7 @@ static int unpack_instrumentation_scope_attributes(mpack_reader_t *reader, size_
 
 static int unpack_scope_span_instrumentation_scope(mpack_reader_t *reader, size_t index, void *ctx)
 {
+    int result;
     struct ctrace_instrumentation_scope  *instrumentation_scope;
     struct ctr_msgpack_decode_context    *context = ctx;
     struct ctr_mpack_map_entry_callback_t callbacks[] = \
@@ -151,7 +157,12 @@ static int unpack_scope_span_instrumentation_scope(mpack_reader_t *reader, size_
 
     ctr_scope_span_set_instrumentation_scope(context->scope_span, instrumentation_scope);
 
-    return ctr_mpack_unpack_map(reader, callbacks, ctx);
+    result = ctr_mpack_unpack_map(reader, callbacks, ctx);
+    if (result != CTR_DECODE_MSGPACK_SUCCESS) {
+        ctr_instrumentation_scope_destroy(context->scope_span->instrumentation_scope);
+        context->scope_span->instrumentation_scope = NULL;
+    }
+    return result;
 }
 
 /* Event callbacks */
@@ -541,6 +552,7 @@ static int unpack_span_status(mpack_reader_t *reader, size_t index, void *ctx)
 
 static int unpack_span(mpack_reader_t *reader, size_t index, void *ctx)
 {
+    int result;
     struct ctr_msgpack_decode_context    *context = ctx;
     struct ctr_mpack_map_entry_callback_t callbacks[] = \
         {
@@ -565,8 +577,14 @@ static int unpack_span(mpack_reader_t *reader, size_t index, void *ctx)
     if (context->span == NULL) {
         return CTR_DECODE_MSGPACK_ALLOCATION_ERROR;
     }
+    result = ctr_mpack_unpack_map(reader, callbacks, ctx);
 
-    return ctr_mpack_unpack_map(reader, callbacks, ctx);
+    if (result != CTR_DECODE_MSGPACK_SUCCESS) {
+        ctr_span_destroy(context->span);
+        context->span = NULL;
+    }
+
+    return result;
 }
 
 /* Scope span callbacks */
@@ -591,6 +609,7 @@ static int unpack_scope_span_schema_url(mpack_reader_t *reader, size_t index, vo
 
 static int unpack_scope_span(mpack_reader_t *reader, size_t index, void *ctx)
 {
+    int result;
     struct ctr_msgpack_decode_context    *context = ctx;
     struct ctr_mpack_map_entry_callback_t callbacks[] = \
         {
@@ -606,7 +625,12 @@ static int unpack_scope_span(mpack_reader_t *reader, size_t index, void *ctx)
         return CTR_DECODE_MSGPACK_ALLOCATION_ERROR;
     }
 
-    return ctr_mpack_unpack_map(reader, callbacks, ctx);
+    result = ctr_mpack_unpack_map(reader, callbacks, ctx);
+    if (result != CTR_DECODE_MSGPACK_SUCCESS) {
+	ctr_scope_span_destroy(context->scope_span);
+	context->scope_span = NULL;
+    }
+    return result;
 }
 
 /* Resource span callbacks */

src/ctr_span.c

@@ -34,7 +34,7 @@ struct ctrace_span *ctr_span_create(struct ctrace *ctx, struct ctrace_scope_span
 
     /* allocate a spanc context */
     span = calloc(1, sizeof(struct ctrace_span));
-    if (!span) {
+    if (span == NULL) {
         ctr_errno();
         return NULL;
     }
@@ -45,14 +45,14 @@ struct ctrace_span *ctr_span_create(struct ctrace *ctx, struct ctrace_scope_span
 
     /* name */
     span->name = cfl_sds_create(name);
-    if (!span->name) {
+    if (span->name == NULL) {
         free(span);
         return NULL;
     }
 
     /* attributes */
     span->attr = ctr_attributes_create();
-    if (!span->attr) {
+    if (span->attr == NULL) {
         free(span);
         return NULL;
     }
@@ -116,7 +116,9 @@ int ctr_span_set_span_id(struct ctrace_span *span, void *buf, size_t len)
     if (!buf || len <= 0) {
         return -1;
     }
-
+    if (span->span_id != NULL) {
+        ctr_id_destroy(span->span_id);
+    }
     span->span_id = ctr_id_create(buf, len);
     if (!span->span_id) {
         return -1;
@@ -294,26 +296,29 @@ void ctr_span_destroy(struct ctrace_span *span)
     struct ctrace_span_status *status;
     struct ctrace_link *link;
 
-    if (span->name) {
+    if (span->name != NULL) {
         cfl_sds_destroy(span->name);
     }
 
-    if (span->trace_id) {
+    if (span->trace_id != NULL) {
         ctr_id_destroy(span->trace_id);
     }
 
-    if (span->span_id) {
+    if (span->span_id != NULL) {
         ctr_id_destroy(span->span_id);
     }
 
-    if (span->parent_span_id) {
+    if (span->parent_span_id != NULL) {
         ctr_id_destroy(span->parent_span_id);
     }
 
     /* attributes */
-    if (span->attr) {
+    if (span->attr != NULL) {
         ctr_attributes_destroy(span->attr);
     }
+    if (span->trace_state != NULL) {
+        cfl_sds_destroy(span->trace_state);
+    }
 
     /* events */
     cfl_list_foreach_safe(head, tmp, &span->events) {
@@ -329,7 +334,7 @@ void ctr_span_destroy(struct ctrace_span *span)
 
     /* status */
     status = &span->status;
-    if (status->message) {
+    if (status->message != NULL) {
         cfl_sds_destroy(status->message);
     }
 
@@ -346,17 +351,17 @@ struct ctrace_span_event *ctr_span_event_add_ts(struct ctrace_span *span, char *
 {
     struct ctrace_span_event *ev;
 
-    if (!name) {
+    if (name == NULL) {
         return NULL;
     }
 
     ev = calloc(1, sizeof(struct ctrace_span_event));
-    if (!ev) {
+    if (ev == NULL) {
         ctr_errno();
         return NULL;
     }
     ev->name = cfl_sds_create(name);
-    if (!ev->name) {
+    if (ev->name == NULL) {
         free(ev);
         return NULL;
     }