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Check Lua stack before pushing cons args

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Prevents a Lua stack overrun when executing absurd console commands for
local-only lua commands.
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Eidolon 2024-02-11 15:10:51 -06:00 • committed by James R
parent 6d64d15216
commit 63ff2f3f66
1 changed files with 5 additions and 0 deletions
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5
src/lua_consolelib.c
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@ -187,6 +187,11 @@ void COM_Lua_f(void)
I_Assert(lua_isfunction(gL, -1)); I_Assert(lua_isfunction(gL, -1));
lua_remove(gL, -2); // pop command info table lua_remove(gL, -2); // pop command info table
if (!lua_checkstack(gL, COM_Argc() + 1))
{
CONS_Alert(CONS_WARNING, "lua command stack overflow (%d, need %s more)\n", lua_gettop(gL), sizeu1(COM_Argc() + 1));
return;
}
LUA_PushUserdata(gL, &players[playernum], META_PLAYER); LUA_PushUserdata(gL, &players[playernum], META_PLAYER);
for (i = 1; i < COM_Argc(); i++) for (i = 1; i < COM_Argc(); i++)
lua_pushstring(gL, COM_Argv(i)); lua_pushstring(gL, COM_Argv(i));