On Tue, Oct 25, 2016 at 07:38:01PM +0200, Miroslav Rovis wrote: > Sorry about noticing your reply only now. > > Namely, thinking that people over at hardened ML would tell more about > it, I indirectly initiated a thread over at hardened ML: > https://archives.gentoo.org/gentoo-hardened/message/09bbf3bfe59a938f11ac044e891db77e > > Will surely check it! And am CC'ing hardened about this patch at the > hardened ML. Maybe they patch and forward the 4.4.8-r1 to 4.4.8-r2 . > --- > Only now looked at the patch. > > No, you don't get it. And I'm not CC'ing this to hardened ML. > > You can't just run the patch for a vanilla kernel onto a > grsecurity-patched kernel. Look up the hardened-sources, and how they > are patched, and what the mm.h and the gup.c in question (there are a > few of so named files in various directories) look in the > hardened-sources, and how they look in the vanilla-sources...
fernan@navi /usr/src/linux-4.4.8-hardened-r1 $ sudo patch -p1 < /home/fernan/dirtycow.patch patching file include/linux/mm.h Hunk #1 succeeded at 2131 (offset 19 lines). patching file mm/gup.c Hunk #3 succeeded at 357 (offset -5 lines). It works so I guess you can. Never say you can't do something before trying cause then you look like an idiot. And the patch says which are the files in question! > > If I'm not mistaken, and I did check it. No, I'm not mistaken, you just > sent me the Linus's patch. Yes you are mistaken, cause if you've tried it you wouldb't be asking the question. And yes, that is Linus patch. > > No, wrong. But thanks for trying to help! > > On 161025-13:16-0400, Fernando Rodriguez wrote: > > On Tue, Oct 25, 2016 at 07:11:54AM +0200, Miroslav Rovis wrote: > > > On 161021-11:04-0400, Rich Freeman wrote: > > > > On Fri, Oct 21, 2016 at 10:49 AM, Mick <michaelkintz...@gmail.com> > > > > wrote: > > > > > https://github.com/dirtycow/dirtycow.github.io/wiki/VulnerabilityDetails > > > > > > > > Not yet: > > > > https://bugs.gentoo.org/show_bug.cgi?id=597624 > > > > > > > > > > We are talking grsecurity-patched (kind of stable[*]) kernel sources, > > > the =sys-kernel/hardened-sources-4.4.8-r1 package [**]. > > > > > > I read most of the discussion, and I could easily patch the gup.c and > > > mm.h in question, but those files need to be patched before application > > > of the grsecurity patch, and that is a little more complex work. > > > > Did you tried it? > > The patch attached comes straight from the git repo, just run: > > > > # cd /usr/src/linux > > # patch -p1 < path/to/patch > > > > It'll likely work. > > > > > > > > Has anybody done this, as I have limited time available to practice user > > > patching (which in its simplest form, I was able to do here: > > > >=dev-libs/nss-3.24 - Add USE flag to enable SSL key > > > https://bugs.gentoo.org/show_bug.cgi?id=587116#c2 ), in case it can be > > > done with user patching, of course. > > > > > > Anyone? > > > > > > Regards! > > > --- > > > [*] kind of stable, because there are, since about 1 yrs ago, only > > > testing kernel available for the non-paying users ;-( > > > > > > [**] I have to use 4.4.8.r1 because recent kernel all crash with libirt > > > and qemu which I am trying to use: > > > https://bugs.gentoo.org/show_bug.cgi?id=597554 > > > -- > > > Miroslav Rovis > > > Zagreb, Croatia > > > http://www.CroatiaFidelis.hr > > > > > > > > -- > > Fernando Rodriguez > > > commit 1294d355881cc5c3421d24fee512f16974addb6c > > Author: Linus Torvalds <torva...@linux-foundation.org> > > Date: Thu Oct 13 13:07:36 2016 -0700 > > > > mm: remove gup_flags FOLL_WRITE games from __get_user_pages() > > > ... > > Thanks for trying to help! Regards! > -- > Miroslav Rovis > Zagreb, Croatia > http://www.CroatiaFidelis.hr -- Fernando Rodriguez
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