--- ./whoopsie/lib/bson/bson.c	2020-04-18 13:52:03.030969618 +0900
+++ ./whoopsie-fixed/lib/bson/bson.c	2020-04-19 18:31:45.762772248 +0900
@@ -662,6 +662,9 @@
 static int bson_append_estart( bson *b, int type, const char *name, const uint32_t dataSize ) {
     const uint32_t len = strlen( name ) + 1;
 
+    if ( len > INT32_MAX ) 
+        return BSON_ERROR;
+
     if ( b->finished ) {
         b->err |= BSON_ALREADY_FINISHED;
         return BSON_ERROR;