Messages in this thread | | | From | Andy Lutomirski <> | Date | Thu, 15 May 2014 15:15:32 -0700 | Subject | Re: mm: NULL ptr deref handling mmaping of special mappings |
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On Thu, May 15, 2014 at 2:57 PM, Cyrill Gorcunov <gorcunov@gmail.com> wrote: > On Thu, May 15, 2014 at 02:42:48PM -0700, Andy Lutomirski wrote: >> > >> > Looking forward the question appear -- will VDSO_PREV_PAGES and rest of variables >> > be kind of immutable constants? If yes, we could calculate where the additional >> > vma lives without requiring any kind of [vdso] mark in proc/pid/maps output. >> >> Please don't! >> >> These might, in principle, even vary between tasks on the same system. >> Certainly the relative positions of the vmas will be different >> between 3.15 and 3.16, since we need almost my entire cleanup series >> to reliably put them into their 3.16 location. And I intend to change >> the number of pages in 3.16 or 3.17. > > There are other ways how to find where additional pages are laying but it > would be great if there a straightforward interface for that (ie some mark > in /proc/pid/maps output).
I'll try to write a patch in time for 3.15.
--Andy
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