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From: "Daniel Sangorrin" <daniel.sangorrin@toshiba.co.jp>
To: "'Naresh Kamboju'" <naresh.kamboju@linaro.org>
Cc: "'Greg Kroah-Hartman'" <gregkh@linuxfoundation.org>,
        "'open list'" <linux-kernel@vger.kernel.org>,
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Subject: RE: [PATCH 4.4 011/268] Revert "ipc/shm: Fix shmat mmap nil-page protection"
Date: Mon, 4 Jun 2018 09:37:09 +0900
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> -----Original Message-----
> From: Naresh Kamboju [mailto:naresh.kamboju@linaro.org]
> Sent: Friday, June 1, 2018 12:55 AM
> To: Daniel Sangorrin <daniel.sangorrin@toshiba.co.jp>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>; open list
> <linux-kernel@vger.kernel.org>; linux- stable <stable@vger.kernel.org>;
> Davidlohr Bueso <dbueso@suse.de>; Joe Lawrence <joe.lawrence@redhat.com>;
> Andrea Arcangeli <aarcange@redhat.com>; Manfred Spraul
> <manfred@colorfullife.com>; Andrew Morton <akpm@linux-foundation.org>;
> Linus Torvalds <torvalds@linux-foundation.org>
> Subject: Re: [PATCH 4.4 011/268] Revert "ipc/shm: Fix shmat mmap nil-page
> protection"
> 
> On 31 May 2018 at 13:06, Daniel Sangorrin
> <daniel.sangorrin@toshiba.co.jp> wrote:
> >> -----Original Message-----
> >> From: 'Greg Kroah-Hartman' [mailto:gregkh@linuxfoundation.org]
> > ..
> >> Thanks for letting us know, but this was reported already.  See the
> >> emails on lkml with the subject:
> >>       Subject: Re: [PATCH 4.16 000/272] 4.16.13-stable review
> >> from Davidlohr Bueso
> >>       Message-ID: <20180528213039.yy2madue67njkmw5@linux-n805>
> >>
> >> where he discusses that the LTP test is incorrect and that the kernel
> >> change is correct and that LTP is going to be fixed because of this.
> 
> My two cents,
> If you are referring to cve-2017-5669.c
> LTP test case is been fixed few hours ago by Rafael Tinoco,
> 
> - shm_addr = shmat(shm_id, ((void *)1), SHM_RND);
> + shm_addr = shmat(shm_id, ((void *)1), SHM_RND | SHM_REMAP);
> 
> LTP patch pull request and it is been merged.
> https://github.com/linux-test-project/ltp/pull/324

Thanks a lot Naresh.
I confirmed that the latest LTP cve-2017-5669 now PASSes.

Thanks,
Daniel