On Mon, Aug 19, 2019 at 04:31:48PM +0200, Thomas Gleixner wrote: > run_posix_cpu_timers() is called from the timer interrupt. The posix timer > expiry always affects the current task which got interrupted. > > sighand locking is only racy when done on a foreign task, which must use > lock_task_sighand(). But in case of run_posix_cpu_timers() that's > pointless. > > sighand of a task can only be dropped or changed by the task itself. Drop > happens in do_exit()
Well, that's only in case of autoreap. Otherwise this is dropped by the reaper. > changing sighand happens in execve().
