Fix heap buffer overflow

1 files changed, 1 insertions, 1 deletions

diff --git a/ydb/library/yql/parser/pg_wrapper/comp_factory.cpp b/ydb/library/yql/parser/pg_wrapper/comp_factory.cpp
index c8dbff384c..fae36570fc 100644
--- a/ydb/library/yql/parser/pg_wrapper/comp_factory.cpp
+++ b/ydb/library/yql/parser/pg_wrapper/comp_factory.cpp
@@ -1792,7 +1792,7 @@ struct TToPgExec {
 
                     tmp.resize(len);
                     NUdf::ZeroMemoryContext(tmp.data() + sizeof(void*));
-                    memcpy(tmp.data() + sizeof(void*) + VARHDRSZ, item.AsStringRef().Data(), len - VARHDRSZ);
+                    memcpy(tmp.data() + sizeof(void*) + VARHDRSZ, item.AsStringRef().Data(), len - VARHDRSZ - sizeof(void*));
                     UpdateCleanVarSize((text*)(tmp.data() + sizeof(void*)), item.AsStringRef().Size());
                 }