Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default

From	Dan Williams <dan.j.williams@intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default
Date	2016-01-21 01:00 +0100
Message-ID	<qTaPn-5fi-1@gated-at.bofh.it> (permalink)
References	<qT9zY-4u9-5@gated-at.bofh.it> <qTacF-4ZC-13@gated-at.bofh.it> <qTaFI-5bZ-17@gated-at.bofh.it> <qTaPn-5fi-3@gated-at.bofh.it>
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On Wed, Jan 20, 2016 at 3:53 PM, Kees Cook <keescook@chromium.org> wrote:
> On Wed, Jan 20, 2016 at 3:48 PM, Dan Williams <dan.j.williams@intel.com> wrote:
>> On Wed, Jan 20, 2016 at 3:12 PM, Kees Cook <keescook@chromium.org> wrote:
>>> On Wed, Jan 20, 2016 at 2:37 PM, Dan Williams <dan.j.williams@intel.com> wrote:
>>>> Larry reports: "My PowerBook G4 Aluminum with a 32-bit PPC processor
>>>> fails to boot for the 4.4-git series".  This is likely due to X still
>>>> needing /dev/mem access on this platform.
>>>>
>>>> CONFIG_IO_STRICT_DEVMEM is not yet safe to turn on when
>>>> CONFIG_STRICT_DEVMEM=y.  Remove the default so that old configurations
>>>> do not change behavior.
>>>>
>>>> Fixes: 90a545e98126 ("restrict /dev/mem to idle io memory ranges")
>>>> Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
>>>> Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
>>>> Link: http://marc.info/?l=linux-kernel&m=145332012023825&w=2
>>>> Cc: Arnd Bergmann <arnd@arndb.de>
>>>> Cc: Ingo Molnar <mingo@redhat.com>
>>>> Cc: Kees Cook <keescook@chromium.org>
>>>> Cc: Russell King <linux@arm.linux.org.uk>
>>>> Cc: Andrew Morton <akpm@linux-foundation.org>
>>>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>>>> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
>>>
>>> Acked-by: Kees Cook <keescook@chromium.org>
>>>
>>
>> Thanks!
>>
>>> This should probably be CC: stable, yes?
>>
>> No, this breakage is new for the current merge window.
>
> Ah! Okay, I misunderstood the "4.4" comment. Should that be 4.5-git?

I believe Larry meant latest-Linus (v4.4.0+) when he said 4.4-git.

Thread

[PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default Dan Williams <dan.j.williams@intel.com> - 2016-01-20 23:40 +0100
  Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default Kees Cook <keescook@chromium.org> - 2016-01-21 00:20 +0100
    Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default Dan Williams <dan.j.williams@intel.com> - 2016-01-21 00:50 +0100
      Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default Dan Williams <dan.j.williams@intel.com> - 2016-01-21 01:00 +0100
      Re: [PATCH] fix CONFIG_IO_STRICT_DEVMEM, do not enable by default Kees Cook <keescook@chromium.org> - 2016-01-21 01:00 +0100

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