Re: [PATCH] fs: clear file set[ug]id when writing via mmap

[Willy Tarreau]

On Fri, Nov 20, 2015 at 02:00:16AM +0100, Willy Tarreau wrote:
> > diff --git a/mm/memory.c b/mm/memory.c
> > index deb679c31f2a..4c970a4e0057 100644
> > --- a/mm/memory.c
> > +++ b/mm/memory.c
> > @@ -2036,6 +2036,7 @@ static inline int wp_page_reuse(struct mm_struct *mm,
> >  
> >  		if (!page_mkwrite)
> >  			file_update_time(vma->vm_file);
> > +		file_remove_privs(vma->vm_file);
> 
> I thought you said in one of the early mails of this thread that it
> didn't work. Or maybe I misunderstood.

OK never mind for this one I just saw the other mail where you said
the test is OK now. But I'm still worried about the performance so
the other point below remains :

> Also, don't you think we should move that into the if (!page_mkwrite)
> just like for the time update ?

Thanks!
Willy

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