Re: +c-r-prctl-add-ability-to-set-new-mm_struct-exe_file-update-after-mm-num_exe_file_vmas-removal.patch added to -mm tree

From: Cyrill Gorcunov
Date: Thu Apr 19 2012 - 18:16:06 EST

On Fri, Apr 20, 2012 at 02:08:43AM +0400, Konstantin Khlebnikov wrote:
> >>My question is: unless I missed something "it can't be changed again"
> >>is not actually true. A task does PR_SET_MM_EXE_FILE, then it forks
> >>the new child. The child can do PR_SET_MM_EXE_FILE again. Is this
> >>by design?
> >
> >Hmm, not sure, Konstantin?
> Why not? It has new pid, why it cannot change exe_file? Actually I don't care too.
> But even if we include this bit into MMF_INIT_MASK we cannot forbid exe-file change
> in childs tasks which was forked before exe-file change in parent.

OK, I see, thanks.

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