On 09/09/2020 19:13, Al Viro wrote: > On Wed, Sep 09, 2020 at 09:19:11AM +0200, Mickaël Salaün wrote: >> >> On 08/09/2020 20:50, Al Viro wrote: >>> On Tue, Sep 08, 2020 at 09:59:53AM +0200, Mickaël Salaün wrote: >>>> Hi, >>>> >>>> This height patch series rework the previous O_MAYEXEC series by not >>>> adding a new flag to openat2(2) but to faccessat2(2) instead. As >>>> suggested, this enables to perform the access check on a file descriptor >>>> instead of on a file path (while opening it). This may require two >>>> checks (one on open and then with faccessat2) but it is a more generic >>>> approach [8]. >>> >>> Again, why is that folded into lookup/open/whatnot, rather than being >>> an operation applied to a file (e.g. O_PATH one)? >>> >> >> I don't understand your question. AT_INTERPRETED can and should be used >> with AT_EMPTY_PATH. The two checks I wrote about was for IMA. > > Once more, with feeling: don't hide that behind existing syscalls. > If you want to tell LSM have a look at given fs object in a special > way, *add* *a* *new* *system* *call* *for* *doing* *just* *that*. > Fine, I'll do it. It will look a lot like this one though.
