On Fri, Jul 24, 2020 at 8:38 PM Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > > open(O_TRUNC) will not kill suid/sgid on server and fuse_open_in does not > have information if caller has CAP_FSETID or not. > > So force sending setattr() which is called after open(O_TRUNC) so that > server clears setuid/setgid. I don't really like the fact that we lose atomicity if handle_killpriv_v2 is enabled. Let's just add a new flag to open as well. If a filesystem doesn't want to add the complexity of handling that it can still just disable atomic_o_trunc. Thanks, Miklos
