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Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file

From Kees Cook <keescook@chromium.org>
Newsgroups linux.kernel
Subject Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file
Date 2016-04-06 23:30 +0200
Message-ID <rl3bt-1Cm-25@gated-at.bofh.it> (permalink)
References <rkW9Y-4Fb-13@gated-at.bofh.it> <rkXz4-5Wf-21@gated-at.bofh.it> <rkZUd-7Dl-1@gated-at.bofh.it> <rl31M-1xP-11@gated-at.bofh.it>
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On Wed, Apr 6, 2016 at 2:19 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Wed, Apr 6, 2016 at 10:54 AM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
>>
>> So I'd find a patch like the attached to be perfectly acceptable (in
>> fact, we should have done this long ago).
>
> I just committed it, let's see if some odd program uses the iomem
> data. I doubt it, and I always enjoy improvements that remove more
> lines of code than they add.

Hrm, okay. I still think just changing the perms would be less
troublesome. Knowing where the kernel is in physical memory when
debugging physical memory issues seems important to me. But, I have
never actually used it since I prefer looking in kallsyms. :)

-Kees

-- 
Kees Cook
Chrome OS & Brillo Security

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Thread

[PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Emrah Demir <ed@abdsec.com> - 2016-04-06 16:00 +0200
  Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 17:30 +0200
    Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 20:00 +0200
      Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file ed@abdsec.com - 2016-04-06 20:10 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-06 20:30 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-06 20:40 +0200
          Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 20:50 +0200
            Re: [kernel-hardening] Re: [PATCH] KERNEL: resource: Fix bug on  leakage in /proc/iomem file Yves-Alexis Perez <corsac@debian.org> - 2016-04-06 21:00 +0200
              Re: [kernel-hardening] Re: [PATCH] KERNEL: resource: Fix bug on  leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 21:10 +0200
                Re: [kernel-hardening] Re: [PATCH] KERNEL: resource: Fix bug on  leakage in /proc/iomem file Borislav Petkov <bp@alien8.de> - 2016-04-06 21:20 +0200
                Re: [kernel-hardening] Re: [PATCH] KERNEL: resource: Fix bug on  leakage in /proc/iomem file Yves-Alexis Perez <corsac@debian.org> - 2016-04-06 21:20 +0200
                Re: [kernel-hardening] Re: [PATCH] KERNEL: resource: Fix bug on  leakage in /proc/iomem file Ingo Molnar <mingo@kernel.org> - 2016-04-06 23:50 +0200
            Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Bjørn Mork <bjorn@mork.no> - 2016-04-06 21:30 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 20:40 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-06 21:00 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem  file Christian Kujau <lists@nerdbynature.de> - 2016-04-06 21:10 +0200
      Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 23:20 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-06 23:30 +0200
          Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-06 23:40 +0200
        Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-14 06:30 +0200
          Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Emrah Demir <ed@abdsec.com> - 2016-04-14 11:40 +0200
  Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file Kees Cook <keescook@chromium.org> - 2016-04-06 20:10 +0200

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