Messages in this thread | | | Date | Mon, 21 Oct 2019 17:12:55 +0200 | From | Oleg Nesterov <> | Subject | Re: [PATCH v3 1/2] clone3: add CLONE_CLEAR_SIGHAND |
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On 10/21, Oleg Nesterov wrote: > > On 10/14, Christian Brauner wrote: > > > > The child helper process on Linux posix_spawn must ensure that no signal > > handlers are enabled, so the signal disposition must be either SIG_DFL > > or SIG_IGN. However, it requires a sigprocmask to obtain the current > > signal mask and at least _NSIG sigaction calls to reset the signal > > handlers for each posix_spawn call > > Plus the caller has to block/unblock all signals around clone(VM|VFORK). ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
just in case... I meant that posix_spawn() has to block/unblock, not its caller.
> Can this justify the new CLONE_ flag? Honestly, I have no idea. But the > patch is simple and looks technically correct to me. FWIW, > > Reviewed-by: Oleg Nesterov <oleg@redhat.com>
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