linux-kernel - Re: RFC: Tainting the kernel on raw I/O access

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 4 Sep 2014 07:07:39 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <h.peter.anvin@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: RFC: Tainting the kernel on raw I/O access


* H. Peter Anvin <h.peter.anvin@...el.com> wrote:

> 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.

Lets start with the 'only for developers and the crazy' 
interfaces, like /dev/msr access, and extend it step by step?

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/