From 7dd1d6afcc16342fecc70f667ff8ba13b0ad4372 Mon Sep 17 00:00:00 2001 From: Scott Shawcroft Date: Mon, 9 Apr 2018 15:57:16 -0700 Subject: [PATCH] Prevent a heap pointer from living on the stack longer than we need. --- lib/utils/pyexec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/utils/pyexec.c b/lib/utils/pyexec.c index f96deb9e1ce11..718c6828cca12 100644 --- a/lib/utils/pyexec.c +++ b/lib/utils/pyexec.c @@ -90,6 +90,8 @@ STATIC int parse_compile_execute(const void *source, mp_parse_input_kind_t input qstr source_name = lex->source_name; mp_parse_tree_t parse_tree = mp_parse(lex, input_kind); module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, exec_flags & EXEC_FLAG_IS_REPL); + // Clear the parse tree because it has a heap pointer we don't need anymore. + *((uint32_t volatile*) &parse_tree.chunk) = 0; #else mp_raise_msg(&mp_type_RuntimeError, "script compilation not supported"); #endif pFad - Phonifier reborn

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