Messages in this thread | | | Date | Thu, 15 Jan 2015 17:15:43 -0800 | From | Andrew Morton <> | Subject | Re: [RFC][PATCH] procfs: Add /proc/<pid>/mapped_files |
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On Thu, 15 Jan 2015 00:51:50 +0100 Rasmus Villemoes <linux@rasmusvillemoes.dk> wrote:
> > There are still several flags unused in vma.vm_flags btw. > > > > I'm not sure that we can repurpose vm_pgoff (or vm_private_data) for > > this: a badly behaved thread could make its sp point at a random vma > > then trick the kernel into scribbling on that vma's vm_proff? > > Well, we could still check vm_file for being NULL before writing to > vm_pgoff/vm_stack_tid.
Yes, I guess that would work. We'd need to check that nobody else is already playing similar games with vm_pgoff.
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