From ee17493d470ae7fd7b34241f263cfa6d790ce1b3 Mon Sep 17 00:00:00 2001
From: Christian Storm <christian.storm@siemens.com>
Date: Tue, 21 May 2019 14:45:51 +0200
Subject: [PATCH] Lua: fix segfault in image property handling

table2image() calls lua_dump_table() with the 'key' parameter being
NULL and the 'img' parameter set. Subsequently, dict_insert_value() is
called with key == NULL if the Lua stack key's type is string or number,
segfaulting SWUpdate.

Signed-off-by: Christian Storm <christian.storm@siemens.com>
Reported-by: Akihiro Suzuki <akihiro27.suzuki@toshiba.co.jp>
Acked-by: Stefano Babic <sbabic@denx.de>
[Backported from: ee17493d470ae7fd7b34241f263cfa6d790ce1b3]
Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
---
 corelib/lua_interface.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/corelib/lua_interface.c b/corelib/lua_interface.c
index d4ebe4a..443f149 100644
--- a/corelib/lua_interface.c
+++ b/corelib/lua_interface.c
@@ -80,11 +80,11 @@ static void lua_dump_table(lua_State *L, char *str, struct img_type *img, const
 					lua_tostring(L, -1),
 					lua_tostring(L, -2));
 				if (img) {
-					TRACE("Inserting property %s[%s] = %s",
-							key,
-							lua_tostring(L, -1),
+					TRACE("Inserting property %s = %s",
+							key ? key : lua_tostring(L, -1),
 							lua_tostring(L, -2));
-					dict_insert_value(&img->properties, key,
+					dict_insert_value(&img->properties,
+							key ? key : lua_tostring(L, -1),
 							lua_tostring(L, -2));
 				}
 				break;
-- 
2.7.4