From: "H. Peter Anvin" <h.peter.anvin@intel.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Matthew Garrett <mjg59@srcf.ucam.org>
Subject: RFC: Tainting the kernel on raw I/O access
Date: Wed, 03 Sep 2014 14:20:59 -0700 [thread overview]
Message-ID: <5407863B.9030608@intel.com> (raw)
In a meeting earlier today, we discussed MSR access and that it could be
used to do bad things. The same applies to other forms of raw I/O
(/dev/mem, /dev/port, ioperm, iopl, etc.)
This is basically the same problem with which the secure boot people
have been struggling.
Peter Z. suggested we should taint the kernel on raw I/O access, and I
tend to concur.
So what I would like to suggest is that we create a new kernel helper
function which can return an error in secure boot mode and otherwise
taints the kernel with a raw I/O taint.
What do people think?
-hpa
next reply other threads:[~2014-09-03 21:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-03 21:20 H. Peter Anvin [this message]
2014-09-03 22:15 ` RFC: Tainting the kernel on raw I/O access Matthew Garrett
2014-09-03 22:20 ` One Thousand Gnomes
2014-09-03 22:25 ` H. Peter Anvin
2014-09-04 15:56 ` One Thousand Gnomes
2014-09-03 23:46 ` Andi Kleen
2014-09-04 14:10 ` Austin S Hemmelgarn
2014-09-04 16:43 ` One Thousand Gnomes
2014-09-04 5:07 ` Ingo Molnar
2014-09-04 16:47 ` One Thousand Gnomes
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