2017-12-08 0:45 GMT+08:00 Al Viro <viro@xxxxxxxxxxxxxxxxxx>: > On Mon, Nov 27, 2017 at 08:27:55PM +0800, Greentime Hu wrote: > >> +#define start_thread(regs,pc,stack) \ >> +({ \ >> + set_fs(USER_DS); \ > > Not the job of start_thread() - its users (->load_binary() methods of > assorted binfmt) must (and do) call flush_old_exec() first. And > that will switch to USER_DS just fine. Thanks. I will remove this setting in the next version patch.