On Thu, 5 Sep 2019, Peter Zijlstra wrote: > On Thu, Sep 05, 2019 at 02:03:44PM +0200, Thomas Gleixner wrote: > > The thread clock permissions are restricted to tasks of the same thread > > group, but that also prevents a ptracer from reading them. This is > > inconsistent vs. the process restrictions and unnecessary strict. > > > > Relax it to ptrace permissions in the same way as process permissions are > > handled. > > More of a meta comment on the added permission checking; so where > clock_getcpuclockid() is allowed to return -EPERM, it doesn't because > that's in glibc and it has no clue. > > And these patches implement the ptrace checks and result in -EINVAL for > timer_create() and clock_gettime(), even though it should arguably be > -EPERM, but we're not allowed to return that here.
Yeah. Maybe we should nevertheless. Thanks, tglx