Fix stack overflow bug of uloop lua binding.

The static variable `state` in `lua/uloop.c` should be clean after every callback.

Signed-off-by: Xiongfei(Alex) Guo <xfguo@credosemi.com>

diff --git a/lua/uloop.c b/lua/uloop.c
index 51f53c2..5922e04 100644 (file)
--- a/lua/uloop.c
+++ b/lua/uloop.c
@@ -43,6 +43,7 @@ static void ul_timer_cb(struct uloop_timeout *t)
 
        lua_getglobal(state, "__uloop_cb");
        lua_rawgeti(state, -1, tout->r);
+       lua_remove(state, -2);
        lua_call(state, 0, 0);
 }
 
@@ -133,6 +134,7 @@ static void ul_process_cb(struct uloop_process *p, int ret)
        lua_getglobal(state, "__uloop_cb");
        lua_rawgeti(state, -1, proc->r);
        luaL_unref(state, -2, proc->r);
+       lua_remove(state, -2);
        lua_pushinteger(state, ret >> 8);
        lua_call(state, 1, 0);
 }