On Tue, Jul 14, 2020 at 06:14:11PM +0200, Christian Brauner wrote: > mount_setattr() can be expected to grow over time and is designed with > extensibility in mind. It follows the extensible syscall pattern we have > used with other syscalls such as openat2(), clone3(), > sched_{set,get}attr(), and others. I.e. it's a likely crap insertion vector; any patches around that thing will require the same level of review as addition of a brand new syscall. And they will be harder to spot - consider the likely subjects for such patches and compare to open addition of a new syscall...