On Mon, Jan 25, 2016 at 08:09:15PM +0100, Oleg Nesterov wrote: > On 01/25, Sasha Levin wrote: > > > > A random wakeup can get us out of sigsuspend() without TIF_SIGPENDING > > being set. > > and TIF_RESTORE_SIGMASK is just wrong in this case. I'd say this is the > bugfix, not work-around ;) > > > Avoid that by making sure we were signaled, like sys_pause() does. > > > > Signed-off-by: Sasha Levin <[email protected]> > > Acked-by: Oleg Nesterov <[email protected]> > > Thanks Sasha.
Out of curiousity - where did that stray wakeup come from? PTRACE_KILL used to trigger those, but that got fixed. How does one trigger that kind of bugs on the current kernels?
