Re: livepatch: old_name@old_addr scheme in livepatch sysfs directory

From	Jessica Yu <jeyu@redhat.com>
Newsgroups	linux.kernel
Subject	Re: livepatch: old_name@old_addr scheme in livepatch sysfs directory
Date	2015-11-02 10:10 +0100
Message-ID	<qqjhL-3tg-11@gated-at.bofh.it> (permalink)
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+++ Jiri Kosina [01/11/15 10:07 +0100]:
>On Sat, 31 Oct 2015, Chris J Arges wrote:
>
>> Makes sense to me. Is there a reason why the sysfs entries are visible
>> to non-root users?
>
>Well, kptr_restrict applies only to values printed using '%pK'. So if the
>sysfs handler is using other printk() format string to print the pointer,
>it'll be leaked out (and should eventually be fixed).

Hm, I think the func.n solution might be a good temporary fix for now.
Even if we do go with func@addr and use the '%pK' format specifier we
will run into the same problem at kptr_restrict == 2.

Jessica
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[PATCH] livepatch: old_name@old_addr scheme in livepatch sysfs directory Chris J Arges <chris.j.arges@canonical.com> - 2015-10-31 04:50 +0100
  Re: livepatch: old_name@old_addr scheme in livepatch sysfs directory Jessica Yu <jeyu@redhat.com> - 2015-11-01 03:00 +0100
    Re: livepatch: old_name@old_addr scheme in livepatch sysfs directory Chris J Arges <chris.j.arges@canonical.com> - 2015-11-01 05:10 +0100
      Re: livepatch: old_name@old_addr scheme in livepatch sysfs  directory Jiri Kosina <jikos@kernel.org> - 2015-11-01 10:10 +0100
        Re: livepatch: old_name@old_addr scheme in livepatch sysfs directory Jessica Yu <jeyu@redhat.com> - 2015-11-02 10:10 +0100

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